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4-Speed Mission Statement 2<br />

4-Speed Transmission 3<br />

4-Speed Components 5<br />

4-Speed & 6-into-4 Components 6<br />

BAKER Tin Type Primary 7<br />

6-into-4 Transmission 9<br />

Splined Shovel Clutch & Stash Tube 11<br />

Kicker Covers 12<br />

BAKER Online 13<br />

BAKER Apparel and Spectro Oils 14<br />

BAKER’s Unbeatable Warranty:<br />

Let’s face <strong>it</strong>: when you are buying a top-of-the-line transmission, primary, or clutch you expect the best. You want to go the distance w<strong>it</strong>h<br />

years of trouble free service. The BAKER R&D department rigorously validates each and every BAKER <strong>Drivetrain</strong> product to guarantee<br />

customer satisfaction w<strong>it</strong>hin our warranty periods. Because of the work we do in advance and our ongoing qual<strong>it</strong>y control measures, <strong>it</strong><br />

is rare that customers have problems w<strong>it</strong>h our products. That’s why BAKER <strong>Drivetrain</strong> offers one of the best warranties in the business.<br />

Complete transmissions and gearsets carry a 5 year 50,000 mile warranty. Clutches, primaries, and ancillary parts carry a 2 year 20,000<br />

mile warranty.<br />

This is the way <strong>it</strong> should be. We guarantee that when you buy BAKER you buy premium, American-made top of the line innovations - but<br />

we can also guarantee that we are going to stand by that product w<strong>it</strong>h unbeatable service for the long haul.<br />

There’s something to be said these days for an American-made product w<strong>it</strong>h that kind of support. Our factory is just outside of Detro<strong>it</strong>, the<br />

Motor C<strong>it</strong>y, in Michigan. We’re part of the every day grind just like you are. Each BAKER product is built to order when you order <strong>it</strong>, w<strong>it</strong>h<br />

all parts made right here in the USA, by guys who know their sh<strong>it</strong> about gearboxes inside and out.<br />

We are the <strong>Drivetrain</strong> Author<strong>it</strong>y: often im<strong>it</strong>ated (by <strong>com</strong>munist China slopes), never duplicated. We’ve changed the face of the Harley<br />

aftermarket w<strong>it</strong>h our original overdrive 6-speed (OD6), Right Side Drive (RSD), DD6, DD7, N1 drums, FF primaries, reverse k<strong>it</strong>s, and the<br />

KKK clutch. Evolving and improving the iconic Harley Davidson ® motorcycle is our business and we are really friggin’ good at <strong>it</strong>.<br />

What does this give you? Peace of mind. Every time you push that button or climb on that kicker - you know there is a strong, dependable<br />

drivetrain ready to go and that BAKER is right beside you every mile along the way.<br />

Go ahead, give BAKER a call today and talk to one of our Sales/Tech professionals... We can promise you clear, English-speaking, tech<br />

savvy people on our end of the line. Guys who ride and appreciate your bike like you do.<br />

9804 E. Saginaw, Haslett, MI 48840<br />

Phone (517) 339-3835, Fax (517) 339-4590, Toll Free (877) 640-2004<br />

info@BAKERdrivetrain.<strong>com</strong><br />

Prices in this book are subject to change.<br />

We have no relationship w<strong>it</strong>h any of the Asian knock-off artists that copy our products and pollute our great country w<strong>it</strong>h inferior gears and shafts made from steel alloys that would be more<br />

appropriate for the manufacturing of soup cans. Any mention of other manufactures is for reference only. Mr.PotatoHead, JIMS, S&S, RevTech, Big Dog, are all trademarks of their respective<br />

ent<strong>it</strong>ies. BAKER <strong>Drivetrain</strong> and BAKER Inc. are not associated w<strong>it</strong>h the Harley-Davidson Motor Company. Sportster, Buell, Softail, Dyna, Road King, Ultra Classic, FXR, FLT, FLST, FLSTC,<br />

FLSTF, FLSTFI, FLSTCI, FLH, FLTR, FLTRI, FLTCUI, FLHTC, FLHR, FLHRI, FLHRC, FXRS, FXRT, FXR2, FXR3, FXRSP, FXD, FXDL, FXDT, FXDLI, FXDXI, Shovelhead, Panhead,<br />

Knucklehead, Evo, Evolution, Twin Cam, Screamin’ Eagle, FLH, Cruise Drive, Harley, H-D, Harley-Davidson and anything else we may have missed in this disclaimer that Harley-Davidson says<br />

they own unless they are BAKER <strong>Drivetrain</strong> trademarks listed below are all trademarks of the Harley-Davidson Motor Company. BAKER <strong>Drivetrain</strong>, BAKER Six-Speed Overdrive, Function-<br />

Formed, OD6, DD6, DD5, DSSC, Torquebox, 6-into-4, BAKER Billet Series,XL6, BAKER KKK, King Kong Klutch, Klassic Kicker Gears,BAKER 300, F6F, PowerBox, DD7, Street Performance<br />

Clutch, FFP, FFPS,Synchronous Belt Drive, <strong>Drivetrain</strong> Author<strong>it</strong>y and BAKER are trademarks of BAKER Inc., Haslett, Michigan.<br />

1


At Biketoberfest in 1998 we unveiled our big new product, the 6-Speed Overdrive. I was confident that this new<br />

transmission would simultaneously solve world hunger, cure breast cancer, and kill all the deer that wa<strong>it</strong> in the<br />

road to get h<strong>it</strong> by a biker . I was proud. Working in the booth one day, some old crusty coot walked by our booth<br />

and asked me what <strong>it</strong> was. I proudly proclaimed “Sir, that’s our new BAKER 6-Speed Overdrive”. W<strong>it</strong>h a cold<br />

stare he looked at me and said: “ what good is <strong>it</strong> if <strong>it</strong> ain’t got a ratchet top?”. I had no response and felt like<br />

snuffing <strong>it</strong>.<br />

I don’t know that cat’s name but I thought a lot about what he said to me 13 years ago. So this catalog is<br />

dedicated to you, mother fucker. You inspired me. I’ve been studying you and your kind for a number years<br />

and finally got you figured out. You don’t want a new bike. You want an old bike. You wouldn’t take a new bike<br />

if <strong>it</strong> was given to you. Riding a new bike would be akin to riding a Chinese moped down main street in Sturgis<br />

wearing a pink tutu.<br />

This catalog has drivetrain <strong>com</strong>ponents, many of them new, for 4-speed Big Twins (1936-86) and 4-speed<br />

based customs. We’ve been busy. But developing new products for old bikes is tricky because you have to<br />

balance innovation w<strong>it</strong>h her<strong>it</strong>age. Take a look at our new 4-speed. We have a jockey top for <strong>it</strong> now and a N1<br />

drum for foot clutch hand shift junkies. And we didn’t forget about the freaks who own 1984-86 Big Twins; we<br />

now have that special mainshaft length (unique to those bikes) now for our 6-into-4s. Finally, our new Tin Type<br />

Primary (TTP) is the first modern enclosed primary for old bikes that gives a nod to the original tin primaries<br />

from 1936. But the TTP f<strong>it</strong>s today’s alternator/generator hermaphrod<strong>it</strong>e motors, doesn’t leak, and is set up for<br />

dependable and tidy modern starters.<br />

I want to find the guy who cut me down to size 13 years ago and gave me<br />

proper motivation. If you read this, <strong>com</strong>e find me at the next bike show and<br />

identify yourself. I want to shake your hand and thank you.<br />

The <strong>com</strong>ponents we offer for the Harley Davidson® drivetrain aftermarket are now broken up into 4 catalogs: Cruise<br />

Drive era (2007-later), 5-speed era (1984-2006), 4-speed era (1936-86), and Custom/Performance (includes Big Dog<br />

and Sportster/Buell). All four catalogs are available in hard copy or can be downloaded from our webs<strong>it</strong>e. Each catalog<br />

is technically informative, includes some reference pricing, and should provide the information necessary to improve the<br />

performance of your American V-Twin. If, after reading this catalog, you still have questions then give our experienced<br />

tech or sales staff a call at (877) 640-2004 or send an Email to info@BAKERdrivetrain.<strong>com</strong>.<br />

2


- Klassic Kicker Gears <strong>com</strong>e<br />

standard on kicker models.<br />

PN 4-70E84-R-FX-RR-23<br />

MSRP $2695<br />

The introduction of the Knucklehead and the 4-speed in 1936 marked an epoch in the history of American motorcycles.<br />

Many consider the period of 1936-84 the holy grail of Harley fuckin Davidson. To carry on that legacy we developed the<br />

BAKER 4-speed, available w<strong>it</strong>h ratchet top or jockey top lids.<br />

The external arch<strong>it</strong>ecture of our cast (A356-T6) 4-speed transmission case was modeled after factory cases to capture all<br />

the details and character of the original design. But we made many functional upgrades to address short<strong>com</strong>ings of the<br />

original design like leaks, serviceabil<strong>it</strong>y, and durabil<strong>it</strong>y.<br />

The loose rollers on the maindrive gear were replaced w<strong>it</strong>h a radial ball bearing. The bronze bushings on the gearset were<br />

replaced w<strong>it</strong>h caged needle bearings. We added a provision, hidden in the back of the case, for an electronic speedo but<br />

retained the trad<strong>it</strong>ional worm gear speedo provision on the front of the case. The stock Fred Flintstone shift detent was<br />

replaced w<strong>it</strong>h a snot-slick linear ball bearing detent for that smooth ‘snick-pop’ shift qual<strong>it</strong>y you expect from us.<br />

BASE PN Description F<strong>it</strong>ment<br />

4-3664 4-speed, no ear case, 2:1 speedo drive 1936-64 FL & FX<br />

4-6569 4-speed, 2:1 speedo drive 1965-69 FL & FX<br />

4-70E84 4-speed, 1:1 speedo drive 1970-E84 FL & FX<br />

4-7090 4-speed, 1:1 speedo, splined mainshaft 1970-E84 FL & FX,<br />

splined clutch conversion<br />

Each transmission is hand built to order. Use the base part number above an add<br />

suffixes (w<strong>it</strong>h a “-“ before each suffix) to specify the desired configuration:<br />

Case finishes: R=casted, B=wrinkle black, P=polished<br />

Ratchet set up: FL=bottom pull, FX=top pull<br />

Drum option: N1=N1 drum (N-1-2-3-4 shift pattern) for top pull only<br />

Kicker cover: RR=replica raw/casted, RB=replica wrinkle black,<br />

RP=replica polished, FF= function formed polished, BPH=Billet polished<br />

Hydraulic, BPM=billet polished mechanical, BC=billet cable type; see Page 12 for details<br />

Sprocket: 23=23 tooth sprocket, 24=24 tooth sprocket<br />

Notes:<br />

- Default shifter lid is Ratchet top style for all<br />

part numbers. To specify jockey top add<br />

‘JT’ suffix<br />

- 4-3664 <strong>com</strong>es standard w<strong>it</strong>h a ‘no ear’<br />

case for tin primary <strong>com</strong>patibil<strong>it</strong>y. Other<br />

base part numbers <strong>com</strong>e standard w<strong>it</strong>h<br />

‘ear’ cases. To specify ‘no ear’ for other<br />

base part numbers,<br />

add ‘NE’ suffix.<br />

- Neutral sw<strong>it</strong>ch is standard on ratchet and<br />

jockey top. To specify deletion of neutral<br />

sw<strong>it</strong>ch, add ‘NS’ to part number. A low<br />

profile threaded plug is installed in place of<br />

the sw<strong>it</strong>ch.<br />

Alignment track on bottom of ‘no ear’ case (in between the studs) f<strong>it</strong>s tongueand-groove<br />

style into the transmission plate to prevent lateral movement.<br />

Image at top of page shows adjuster boss which prevents fore-aft movement.<br />

3


Shift drum options<br />

We manufacture 3 shift drums for the<br />

4-speed; the FX & FL types w<strong>it</strong>h<br />

conventional shift patterns and N1 style.<br />

Put an FX drum on a FL tranny and stomp<br />

down on the shift lever to upshift. Same<br />

thing if you put a FL drum on a FX tranny.<br />

The N1 drum takes the FX pattern and<br />

relocates neutral down below 1st for a<br />

N-1-2-3-4 pattern as an alternative to the<br />

standard 1-N-2-3-4 pattern. Great for foot<br />

clutch and performance applications. Call<br />

our toll free line for more details.<br />

Gear Ratios:<br />

1st Gear 2.50<br />

2nd Gear 1.70<br />

3rd Gear 1.25<br />

4th Gear 1.00<br />

Gearset<br />

Top pull ratchet top on left (FX) , bottom pull on right (FL)<br />

4-speed gears and shafts are manufactured w<strong>it</strong>h 8620 steel. Vacuum<br />

carburized heat treat gives a case hardness of 58-62 Rockwell ‘C’. Gear tooth<br />

profiles are ground and finished w<strong>it</strong>h diamond tooling after heat treat to correct<br />

the tooth distortion that naturally occurs when you put a chunk of steel in a very<br />

hot furnace. Take off the shifter lid on our 4-speeds and turn the shafts; you<br />

will hear silence because the involute profiles are perfect. The designers of this<br />

transmission back in the 30s would be envious of the improvements we made<br />

to their design w<strong>it</strong>h modern manufacturing processes.<br />

We added lead-in helical ramps on the shift clutches to improve shift qual<strong>it</strong>y.<br />

All bronze bushings were replaced w<strong>it</strong>h modern low friction bearings.<br />

And yes, the BAKER 4-speed use the tried and true 37310-39 cone style<br />

throw-out bearing and 1-piece release rod.<br />

Note lead-in ramps<br />

Shift clutch dog teeth<br />

Maindrive gear has matching lead-in<br />

ramps and needle bearings in bore<br />

Holes drilled in cluster gear feed oil to<br />

the needle bearings<br />

Hidden vent design breathes<br />

through the ratchet cav<strong>it</strong>y<br />

Jockey top <strong>com</strong>patible w<strong>it</strong>h all<br />

base part numbers<br />

4


4-speed <strong>com</strong>ponents<br />

n1 drum<br />

The N1 drum changes the shift pattern<br />

from the standard 1-N-2-3-4 to N-1-2-3-4.<br />

Eliminates the possibil<strong>it</strong>y of catching neutral on a<br />

1-2 upshift. A quadriplegic could find neutral on a hand<br />

shift bike w<strong>it</strong>h the N1 shift pattern. We start w<strong>it</strong>h a solid<br />

chunk of steel, machine in all the features, then remove the<br />

unnecessary material. Two teflon coated bushings are pressed<br />

into the drum axis bore for smooth rotation on shifts.<br />

Installs into existing 1952-79 ratchet tops w<strong>it</strong>h no modification.<br />

Can also be specified, no cost, in a new 4-speed build.<br />

PN 4-155N1-K<br />

MSRP $325<br />

PN 157-4PA<br />

MSRP $25<br />

Speedo hole plug<br />

Ever see oil leaking around the speedo hole on the front case wall of a<br />

4-speed? The standard block-off plate does a half-ass job. So we made<br />

one w<strong>it</strong>h 6061-T6 and an O-ring that works and looks good. Show polished<br />

finish.<br />

4-SPEED & 6-INTO-4 COMPONENTS<br />

We started making 6-into-4 transmissions w<strong>it</strong>h kickers over five years<br />

ago. At the time, we could only purchase some Taiwanese sh<strong>it</strong> kicker<br />

gears in volume because nobody made them in the USA anymore<br />

and that wasn’t gonna get <strong>it</strong>. So we tooled up our own right here in<br />

Michigan, fuck <strong>it</strong>. They <strong>com</strong>e standard on all BAKER 4-speeds,<br />

6-into-4s, and kicker k<strong>it</strong>s.Take a pair of imported sh<strong>it</strong> gears and roll<br />

the teeth together; they roll like a mismatched pair of gears and<br />

are dangerous to have inside your tranny. Klassic Kicker Gears roll<br />

smooth as glass. They’re not cheap, but they are the last set you will<br />

have to buy.<br />

PN 140-64<br />

MSRP $284<br />

5


4-speed & 6-into-4 <strong>com</strong>ponents<br />

Kick arm and pedal<br />

When we first started producing the 6-into-4, we purchased our pedal and kick arm from a supplier but there were two<br />

problems. First, the spindle on the kick pedal was ½” diameter made out of sh<strong>it</strong> metal and occasionally broke. After<br />

receiving many death threats, we designed and tooled our own pedal (876 bronze) and made the larger 5/8” spindle out<br />

of pre-heat treated 4140; problem solved. Next we designed and tooled a straight kick arm out of 304 stainless steel<br />

because the 6-into-4 sticks out an extra 1.6” (<strong>com</strong>pared to 4-speeds) and no elbow is required.<br />

352-64K Bronze pedal w<strong>it</strong>h 5/8” hard chrome plated spindle<br />

351-64K Kick arm, standard length, Stainless steel, polished<br />

353-64K Kick arm, +1” length, Stainless steel, polished<br />

3510-64 Kick arm and pedal assembly, standard length<br />

3511-64 Kick arm and pedal assembly, +1” length<br />

Flush mounted<br />

pivot bolt<br />

PN 3510-64<br />

MSRP $225<br />

6-INTO-4 COMPONENTS<br />

Outside bearing support<br />

For BAKER 6-into-4 w<strong>it</strong>h ear case. Running no motor plate<br />

removes the inner primary mainshaft bearing support. This induces<br />

stress on the mainshaft. The outside bearing support corrects<br />

that short<strong>com</strong>ing.<br />

PN 6-4SSP-A<br />

MSRP $189<br />

33 tooth transmission pulley<br />

Convert a BAKER 6-into-4 from chain drive to belt drive w<strong>it</strong>h this<br />

33 tooth pulley. Made w<strong>it</strong>h 1045 steel and <strong>com</strong>patible w<strong>it</strong>h modern secondary drive belts.<br />

PN 32181S<br />

MSRP $255<br />

6


PN 3101-TTPS-P polished primary MSRP $2195<br />

w<strong>it</strong>h optional PN 3102-TTP-P covers MSRP $495<br />

S&S started some sh<strong>it</strong>. A couple years ago they took the classic Shovel, Pan, and<br />

Knuckle engine designs and re-birthed them w<strong>it</strong>h many modern improvements to<br />

address leaks, durabil<strong>it</strong>y, reliabil<strong>it</strong>y, and performance. So we took the hint and<br />

re-engineered the venerable ratchet top 4-speed w<strong>it</strong>h that classic external<br />

arch<strong>it</strong>ecture and updated <strong>it</strong> w<strong>it</strong>h many modern improvements. And we recently<br />

released the jockey top version. The only piece of the puzzle missing was the<br />

primary. We took the classic 1936-64 tin primary design and re-constructed <strong>it</strong> w<strong>it</strong>h<br />

6061-T6 aluminum to facil<strong>it</strong>ate alternator motor case <strong>com</strong>patibil<strong>it</strong>y, address leaks,<br />

reduce chain noise, and make modern starter integration possible. The result is the<br />

Tin Type Primary (TTP) in kick-only and starter type configurations available w<strong>it</strong>h<br />

blasted or show polished finishes. Starter version is set up for factory 1990-2006<br />

starters. Stock tin derby and inspection covers f<strong>it</strong> but we highly re<strong>com</strong>mend our<br />

sexy 6061-T6 Aluminum TTP covers. The design utilizes our fine tooth modern<br />

L-bracket chain tensioner.<br />

Right side view of a starter version TTP in 1976 FX<br />

Run <strong>it</strong> WET or DRY<br />

Can be run dry w<strong>it</strong>h Shovelhead era clutches and a 1970-E84 4-speed.<br />

Chain oiler feed and return provisions are on back side of inner primary<br />

similar to factory locations. Remove 1/8” NPT plugs and install f<strong>it</strong>tings<br />

(provided).<br />

For a cleaner look w<strong>it</strong>h better clutch function, heat dissipation, and<br />

dependabil<strong>it</strong>y the TTP can be run wet w<strong>it</strong>h primary oil w<strong>it</strong>h the Splined<br />

Shovel clutch ( see page 12) in conjunction w<strong>it</strong>h the BAKER splined<br />

4-speed mainshaft. Splined 4-speed mainshaft available to convert any<br />

existing 1970-E84 transmission or <strong>it</strong> can be specified in a new BAKER<br />

4-speed build. Splined Shovel clutch is highly re<strong>com</strong>mended for 93+ inch<br />

engines to avoid trouble down the road.<br />

7<br />

1/8” NPT f<strong>it</strong>tings installed on the feed and return<br />

provisions to run dry clutch set up


TTP is <strong>com</strong>patible w<strong>it</strong>h:<br />

- 1970-E84 Big Twins and custom 4-speed builds<br />

- 1970-79 ratchet top 4-speeds (top or bottom pull)<br />

- 1980-E84 turtle top 4-speeds (non starter TTP version only)<br />

- Jockey top 4-Speeds<br />

- Alternator style motor cases<br />

- Shovelhead clutches and BAKER splined clutch<br />

(see page 11)<br />

- 1990-2006 1.4kw H-D starters w<strong>it</strong>h ¼-20 or 10-32 shaft<br />

- Trad<strong>it</strong>ional tin derby and inspection covers or BAKER TTP<br />

covers<br />

- 1955-64 splined non-<strong>com</strong>pensator motor sprockets<br />

- Stock 40007-36B primary chains<br />

Primary drive configuration options:<br />

- 24 tooth motor sprocket, 37 tooth clutch sprocket, and stock 82<br />

p<strong>it</strong>ch primary chain (PN 40007-36B), for a 1.54 primary ratio.<br />

24 tooth motor sprocket is maximum size that f<strong>it</strong>s w<strong>it</strong>hin the TTP<br />

envelope<br />

- 22 tooth motor sprocket, 35 tooth clutch sprocket, and 80 p<strong>it</strong>ch<br />

primary chain (available through BAKER) for a 1.59 primary<br />

reduction. 35 tooth clutch sprocket available w<strong>it</strong>h BAKER splined<br />

Shovel clutch, see page 11.<br />

- 23 tooth motor sprocket, 38 tooth clutch sprocket, and<br />

stock 82 p<strong>it</strong>ch primary chain (PN 40007-36B) for a 1.65<br />

reduction. 38 tooth clutch sprocket available w<strong>it</strong>h<br />

BAKER splined Shovel clutch, see page 11.<br />

1976 FX w<strong>it</strong>h PN 3101-TTPS-R TTP<br />

and PN 3102-TTTP-R Derby and<br />

inspection covers (MSRP $395)<br />

(MSRP $1995)<br />

Part number and descriptions for 1970-E84<br />

applications and custom 4-speed:<br />

Pn<br />

3100-TTP-R<br />

3100-TTP-P<br />

3101-TTPS-R<br />

3101-TTPS-P<br />

3102-TTP-R<br />

3102-TTP-P<br />

Description<br />

TTP w<strong>it</strong>h hardware*, kick only, media blasted<br />

finish<br />

TTP w<strong>it</strong>h hardware*, kick only, show polished<br />

TTP w<strong>it</strong>h hardware*, starter version, media<br />

blasted finish<br />

TTP w<strong>it</strong>h hardware*, starter version, show<br />

polished<br />

TTP derby and inspection covers w<strong>it</strong>h<br />

hardware^, media blasted finish<br />

TTP derby and inspection covers w<strong>it</strong>h<br />

hardware^, show polished<br />

TTP starter version w<strong>it</strong>h 22 tooth motor sprocket and<br />

35 tooth clutch sprocket. Note chain drip oiler f<strong>it</strong>ting<br />

*Hardware includes motor sprocket nut, chain adjuster and related<br />

hardware, starter pinion and related hardware (starter version only),<br />

slotted housing screws, NPT f<strong>it</strong>tings, and housing gasket<br />

^ Hardware includes slotted cover screws and gaskets<br />

Installation note<br />

For TTP starter applications, the external clutch lever must be fabricated or purchased<br />

from Fabricator Kevin. Cable type kicker cover (see page 12) can be used w<strong>it</strong>h no<br />

fabrication required.<br />

8


MSRP<br />

starting at<br />

$3350<br />

Years ago we came out w<strong>it</strong>h the 6-into-4 for Shovelheads. Sales of<br />

these transmissions have been a <strong>com</strong>plete shocker and the message<br />

is loud and clear: People love their Shovelheads and they ride the piss<br />

out of them.<br />

Our original 6-into-4 transmission is a direct replacement for the 1970-<br />

Early 1984 4-speed. This year we have mainshaft options that allow<br />

f<strong>it</strong>ment into wet (diaphragm) clutch model Shovels and 4 speed Evo<br />

models that require a longer mainshaft and shorter ones for Pan and<br />

Knuckle. Available w<strong>it</strong>h different kicker covers, see page12. 4-speeds<br />

have a 1:1 forth gear. 6-into4s have a 1:1 fifth gear and a .86:1 sixth<br />

gear; good for a 500 RPM reduction on the highway.<br />

6-INTO-4 FEATURES:<br />

- BAKER Klassic Kicker gears, stainless steel kick arm, and bronze pedal standard<br />

- Case available w<strong>it</strong>h or w<strong>it</strong>hout primary flange; raw, wrinkle black, or polished<br />

- 23 tooth sprocket standard. Optional 24 tooth and 33 tooth pulley<br />

- Forged top cover available w<strong>it</strong>h or w<strong>it</strong>hout neutral sw<strong>it</strong>ch<br />

- Speed sensor provision on right rear of case<br />

- N1 drum, no cost option, for N-1-2-3-4-5-6 shift pattern<br />

Gear ratio<br />

1st 3,24, 2.94, 2.82<br />

2nd 2.21, 2.08<br />

3rd 1.60<br />

4th 1.23<br />

5th 1.00<br />

6th 0.86, 0.80<br />

All 6 into 4 <strong>com</strong>plete transmissions are backed by an unbeatable BAKER 5 year, 50,000 mile warranty<br />

- try that w<strong>it</strong>h your old 4-Speed!<br />

3 mainshaft types available for 6-into-4:<br />

1984-86 Diaphragm type wet clutch<br />

1970-E84 Shovelhead mainshaft<br />

9<br />

1936-64 Knuckle/Pan mainshaft


Base PN Description F<strong>it</strong>ment/Application<br />

6402 6-into-4, Close ratio 2.94 1st gear 1936-86 FL & FX; good all around gear ratio<br />

6412 6-into-4, Stock 3.24 1st gear 1936-86 FL & FX; for heavy GVW applications<br />

64212 6-into-4, R-Ratio 2.82 1st & 2.08 2nd 1936-86 FL & FX; for light hot rods<br />

Note:<br />

Deep overdrive 6th gear (0.80) available as no-cost option, consult BAKER tech line<br />

Each transmission is hand built to order. Use the base part number above and add suffixes<br />

(w<strong>it</strong>h a “-“ before each suffix) to specify the desired configuration:<br />

Case finishes: R=raw/casted, B=wrinkle black, P=polished<br />

Drum option: N1=N1 drum (N-1-2-3-4-5-6 shift pattern)<br />

Case style: Standard case has ‘4-stud ears‘ for primary, specify no ear case by adding NE suffix (1936 style)<br />

Kicker cover: Standard chrome kicker cover shown in image on page 9. Optional kicker cover suffixes:<br />

FF= function formed polished, BPH=Billet polished Hydraulic, BPM=billet polished mechanical,<br />

BC=billet cable type, E=electric start; see Page 12 for details<br />

Mainshaft length: 1970-E84 mainshaft standard, optional lengths: -36 for 1936-64 mainshaft, -84 for 1984-86<br />

23 Tooth sprocket standard. Specify optional 24 Tooth sprocket by adding -24 suffix or -33 for pulley<br />

PN 6402P-FF shown MSRP $3,895<br />

w<strong>it</strong>h optional bearing support<br />

PN 6-4SSP-A MSRP $189<br />

Installation notes:<br />

- 6-into-4 has 2 more gears than a 4-speed and sticks out 1.6” more. Rear exhaust pipe, oil<br />

tank brackets, and starter brackets may have to be modified for f<strong>it</strong>ment.<br />

- 6-into-4 case does not have speedometer cable provision on front of case<br />

- Electric speed sensor provision in case accepts stock 1994-up speed sensors.<br />

- Some 1970s inner primaries may require modification for sprocket nut clearance.<br />

- Optional 33 tooth pulley (see page 6) adapts 6-into-4 to factory rear belt drive.<br />

N1 drum<br />

Mechanical Kicker<br />

Cover, PN 478-56MP<br />

Hydraulic Kicker Cover,<br />

PN 479-56P<br />

Klassic Kicker Gears<br />

PN 140-64<br />

Klassic Kicker<br />

Gears standard on<br />

6-into-4<br />

10


splined Shovel clutch retrof<strong>it</strong>/<br />

upgrade for 1970-E84 Big Twin<br />

You know the sad story. The torque on the clutch nut backs<br />

off a hair and the key on the transmission mainshaft shears<br />

off. This usually happens at the most inconvenient time and<br />

place. And the probabil<strong>it</strong>y of this sad story playing out is<br />

greater w<strong>it</strong>h performance applications.<br />

The splined Shovel clutch k<strong>it</strong> retrof<strong>it</strong>s and upgrades the<br />

stock tapered mainshaft and clutch to a modern 18 tooth<br />

spline configuration. K<strong>it</strong> includes a fully assembled clutch<br />

and splined 4-speed mainshaft to retrof<strong>it</strong> stock 1970-E84<br />

Big Twins.<br />

The clutch is based off of our 9-plate clutch used on 1990-up<br />

applications and f<strong>it</strong>s in the stock primary housing and TTP.<br />

We offer 35, 36, 37, and 38 tooth clutch sprockets w<strong>it</strong>h our<br />

clutches to dial in your overall gear ratio. 18 tooth mainshaft<br />

installs into the stock 4-speed transmission just like stock.<br />

Pn<br />

Description<br />

9P400* Splined Shovel clutch assembly<br />

9P401* Splined Shovel clutch k<strong>it</strong>, includes<br />

Clutch and Splined 4-speed mainshaft<br />

Shaft available separately<br />

PN MS-4-SPLINE<br />

MSRP $385<br />

PN 9P401-37-S clutch<br />

and mainshaft k<strong>it</strong><br />

MSRP $995<br />

*- Specify clutch sprocket by adding a “-35”, “-36”,“-37” & “-38” suffix to part number<br />

- “-K”, for kick only, or “-S” for starter ring gear version<br />

Stash tube for Big Twins<br />

w<strong>it</strong>h alternator left side case and generator right side case<br />

The term ‘crank’ was coined because some road dogs used to put<br />

their crystal meth in the crankcases of their engines to hide <strong>it</strong> from<br />

Johnny Law. But crank melts in the heat, and oily crank doesn’t<br />

sound too tasty. So we developed a stash tube to keep registration<br />

papers dry and to keep the stash cool and oil-free.<br />

Made w<strong>it</strong>h 6061-T6 aluminum w<strong>it</strong>h a screw-on top and a .200”<br />

thick O-ring for a water-tight seal. Internal diameter is 2.5” and is<br />

4” deep.<br />

PN ST-150B, installed on Panhead w<strong>it</strong>h<br />

alternator left side case<br />

11<br />

PN ST-155R<br />

MSRP $199<br />

For Knuckle, Pan, and Shovel w<strong>it</strong>h<br />

alternator left side and generator<br />

right side case:<br />

Pn<br />

ST-150B<br />

ST-155R<br />

MSRP $199<br />

Description<br />

Stash tube, cat black, highlighted fins<br />

Stash tube, media blasted, highlighted fins


Kick starting a 74 inch motor w<strong>it</strong>h 7.5:1 <strong>com</strong>pression ratio is one thing; kicking a healthy 93 inch motor is qu<strong>it</strong>e another. Our<br />

kicker covers are designed w<strong>it</strong>h structural overkill to handle the bending forces imposed on that kicker shaft when the weight<br />

of your body on that kick pedal has a fist fight w<strong>it</strong>h the gods of spark and <strong>com</strong>bustion .<br />

Mechanical - inside<br />

PN 478-56MP-K<br />

Mechanical version Features<br />

- Stainless steel release shaft support w<strong>it</strong>h O-ring<br />

- Includes release shaft and finger<br />

- Compatible w<strong>it</strong>h 37310-39 type throwout<br />

bearing (not included)<br />

Hydraulic - inside<br />

PN: 478-56HP-K<br />

Hydraulic version Features<br />

- 1.5” actuator piston included<br />

- 11/16” master cylinder re<strong>com</strong>mended<br />

- Includes BAKER Heavy Duty Throw out bearing<br />

cable type - inside<br />

PN 478-56cp-k<br />

Cable type features<br />

- Ball and ramp actuator; uses 1987-2006<br />

Big Twin clutch cables<br />

- Eliminates external linkages. Great for bikes<br />

w<strong>it</strong>h lim<strong>it</strong>ed clearance above the<br />

transmission and around the oil tank<br />

ff hydraulic - inside<br />

PN: 479-56P-K<br />

Function Formed Hydraulic features<br />

-Structurally gusseted FF design w<strong>it</strong>h<br />

vulgar display of mechanical purpose<br />

-Comes w<strong>it</strong>h 1.5” actuator piston;<br />

<strong>com</strong>patible w<strong>it</strong>h 11/16 master cylinders<br />

BAKER kicker cover Features (all)<br />

MSRP $695<br />

- Kicker cover carved from 6061-T6 aluminum for strength<br />

- 1-piece bronze kicker shaft bushing w<strong>it</strong>h outer seal<br />

- Smooth and strong BAKER Klassic Kicker Gears, includes<br />

mainshaft gear and ratchet hub<br />

- Includes kicker shaft, kicker gear and return spring<br />

assembled as shown<br />

- Zero leak fluid level plug<br />

- Concentric dowels around 2 of the stud pos<strong>it</strong>ions; used on<br />

6-into-4 door and BAKER 4-Speed case for pos<strong>it</strong>ive kicker<br />

cover location<br />

- Show polished finish<br />

12


WE’VE GOT SOCIAL NETWORKING SKILLS YO!<br />

BAKER is hip to the new way that our customers are learning and<br />

<strong>com</strong>municating - We have been paying attention the past few years to the<br />

growing number of bikers who spend their time online. We have also noticed<br />

that information passes quickly, and freely online.<br />

W<strong>it</strong>h that in mind: we have also launched a BAKER MySpace, BAKER<br />

Facebook and you can even catch up to the minute BAKER sales and<br />

updates on your phone by following us on Tw<strong>it</strong>ter.<br />

So look us up on your favor<strong>it</strong>e social networking s<strong>it</strong>e to keep up w<strong>it</strong>h the<br />

latest happenings at BAKER. You will hear about what sales are hot, what<br />

deals we’re passing to our dealers, and more... we can’t gaurantee that you<br />

won’t get a random dirty joke or bathroom update. You’ve been forewarned.<br />

LOG ON AND FOLLOW US!<br />

BAKER ONLINE STORE:<br />

BAKER product offerings 10 years ago were pretty damn simple. We offered 8 different part numbers and that was <strong>it</strong>. Our<br />

printed catalog easily captured and conveyed our product line. American motorcycle enthusiasts got their information by<br />

calling our toll free number, reading magazines, and attending bar stool seminars. Back then, nobody in our world relied<br />

on, or trusted, the internet to obtain n<strong>it</strong>ty-gr<strong>it</strong>ty details on neat new stuff for their scoot. But today, thanks to pornography,<br />

bikers are as web-savvy as the rest of the population. And <strong>it</strong>’s a good thing because BAKER product offerings these days<br />

number in the thousands and many configurational options are available for any one application. In 2009 we launched the<br />

new BAKER E-Commerce s<strong>it</strong>e to simplify the task of product selection for our dealers (password required) and the public.<br />

Look for the E-Commerce button prominently displayed on our home page. It will guide you interactively, through the<br />

maize of options, so you end up w<strong>it</strong>h the right configuration for your application.<br />

The ECommerce store has proved very quickly to be an excellent tool for our dealers and retail customers alike. For<br />

<strong>com</strong>plete updates, log on, and make sure we have your email address in our database! It’s the best way not to miss out!<br />

13


6-speed BAKER brand made in the usa BAKER logo<br />

MSRP $20<br />

twisted fuck king of gears vintage BAKER<br />

dont forget your annual<br />

official BAKER calendar<br />

poster!<br />

BAKER has a full line of apparel including t-shirts, hats, stickers, tin signs<br />

and even shop jackets and shirts for men and women. Check out our<br />

Official BAKER Online Store for availabil<strong>it</strong>y and the latest merchandise<br />

out there! What better way to brag about your BAKER?<br />

There Is More To A Transmission<br />

Than Just Metal<br />

As a <strong>com</strong>pany tenaciously focused on any improvement to the<br />

American Big Twin drivetrain, BAKER <strong>Drivetrain</strong> recognizes the<br />

fluid in the transmission is key in the performance and life of a<br />

transmission. It is a mechanical part of <strong>it</strong> as much as the gears,<br />

case, bearings, etc…so <strong>it</strong> must be of qual<strong>it</strong>y. The Spectro<br />

Platinum Heavy Duty 6-Speed Transmission Lubricant meets<br />

our BAKER <strong>Drivetrain</strong> qual<strong>it</strong>y standards for re<strong>com</strong>mended<br />

transmission oil. Our standard for re<strong>com</strong>mending oil is that <strong>it</strong><br />

must have optimized properties tailored only for <strong>com</strong>ponents<br />

in a V-Twin motorcycle transmission and <strong>it</strong> must exceed all<br />

others in excellence – like our own products do. Cheaper oils<br />

cannot provide all these qual<strong>it</strong>ies.Spectro’s 6-Speed formula<br />

base is synthetic group 4 base stock which is the highest rating<br />

for a synthetic lubricant. It is pure w<strong>it</strong>h absolutely no petroleum<br />

product blended into <strong>it</strong>.<br />

PN BD-75W140<br />

MSRP $14<br />

14


Some say the world will end in December 2012. After the apocalypse, owners of Knuckle, Pan, and<br />

Shovelheads will thrive because that’s what they do. They are survivors. They work on their own iron and they<br />

know their bike better than they know their wife, ex-wives, and kids. They have the real world experience to<br />

know the difference between a good part and a bad one. We make drivetrain <strong>com</strong>ponents for those who know<br />

the difference between sh<strong>it</strong>ty parts and qual<strong>it</strong>y American craftsmanship; that’s the difference between<br />

surviving or not.

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