here - the old site

additional 4 speed parts
4-speed
splined mainshaft
for shovelhead
Have you ever sheared off the clutch key on the mainshaft? Tired of that classic jerky clutch not even the ramjet can
tame? Our splined mainshaft for your stock 4-Speed will allow you to use a modern splined diaphragm or coil spring
clutch setup.
P/N
MS-4-SPLINE
Fitment
4-Speed splined mainshaft for chain drive models only, 1970-Early 1984
straight kick arm
and pedal
Gear Ratios:
1st Gear 2.50
2nd Gear1.70
3rd Gear 1.25
4th Gear 1.00
Cast stainless straight steel kicker arm for custom applications,
stock length or + 1” upgrade option
PN
3510-64
Description
Kick arm assembly, straight design, polished stainless steel,
with bronze pedal
3511-64
Kick arm assembly, straight design + 1” length, polished stainless steel, with bronze pedal
made in the
u.s.a
!
-4
3
2
1-
The introduction of the Knucklehead and the 4-speed in 1936 marked an epoch in the history of American motorcycling. There are those
who live and die by their 4-speeds today. So we developed the BAKER Ratchet Top 4-speed for all those who hail the venerable 4-speed.
N-
The external architecture of our cast (A356-T6) 4-speed transmission case was modeled after factory cases but includes an electric
speedo provision in the back and the traditional 4-speed gear drive provision in the front. Also, the loose rollers on the main drive gear
were replaced with a radial ball bearing. Case is available with 3 finishes; wrinkle black, polished, and raw (bead blasted).
The detent in the Ratchet Top was migrated from the stock Fred Flintstone type to the snot-slick linear detent system for that smooth
snick-pop shift quality you come to expect from us.
4-SPEED N1 DRUM
Available with many kicker cover options in many finishes; kicker and non kicker versions. BAKER Klassic Kicker Gears and bronze kicker
pedal come standard on kicker transmission assemblies. Gearset is made with 8620 steel and gears ride on needle bearings, not brass
bushings. Made in the USA for Americans and those who enjoy American motorcycling.
The N1 shift drums have a 0-down all-up shifting pattern, and
eliminate any possibility of catching neutral on aggressive 1-2
shifts. Neutral is below 1st. The N1 drum is also popular with
handshifting bikes where finding neutral without doubt or error is
critical to safety or riding/looking smooth.
The N1 drum is also available for stock 4-speeds and for our new
ratchet top 4-speed.
This is great for you hand shifters who want neutral at the bottom!
No more missed shifts!
Part No.
4-155N1-K
FITMENT
BAKER N1 Shift drum kit For Stock 4-Speeds, 1952-1979 Ratchet top covers
toll free: 1-877-640-2004
www.bakerdrivetrain.com
PN
DESCRIPTION
FITMENT
SPEEDO GEAR DRIVE RATIOS
4-3664
4 Speed No Ear Trans Assembly
1936-1964 FL & FX Models
2:1 Ratio, 7 tooth drive ring gear
4-6569
4 Speed Ear Trans Assembly
1965-1969 FL & FX Models
2:1 Ratio, 7 tooth drive ring gear
4-7085
4 Speed Ear Trans Assembly
1970-1985 FL & FX Models
1:1 Ratio, 7 tooth drive ring gear
4-70E84
4 Speed Ear Trans Assembly (Splined mainshaft)
1970-Early 1984 FL & FX Models
1:1 Ratio, 7 tooth drive ring gear
NOTES:
- Most FX Models; except 1971 & 72 use a front wheel drive unit for the speedometer. Late FL Models 1981-84 use a front wheel drive
unit for the speedometer
- Add suffix to part number above to specify case finish, shift drum style, kicker cover and sprocket:
Case finishes: R=Raw, B=Wrinkle black, P=Polished
Shift drum styles: FL= Top pull, FX= Bottom pull, N1= N1 Drum
Kicker cover: RR= Replica raw, RB= Replica wrinkle black, RP= Replica polished, BPH= Billet polished-hydraulic, BPM= Billet polished-mechanical,
FF= Function Formed polished, CK= Chrome kicker, CN= Chrome no kicker,
Sprocket type: 23= 23T sprocket, 24= 24T sprocket
toll free: 1-877-640-2004
www.bakerdrivetrain.com
-23T or 24T, 530 o-ring chain sprockets available.
- FL Shift drum; bottom pull (shown on the right)
- FX Shift drum; top pull (shown on the left)
- N1 Shift drum; top pull
- Available with or without primary ear.
- 1965-1985 case (primary ear version)
has an integrated circular tongue-andgroove which allows for positive inner
primary alignment.
- Cast aluminum (A356-T6) transmission case design
to fit a roller ball bearing for your main drive gear.
-Case designed for traditional gear drive speedo pick up and modern late model electronic speedo pick up.
-Cast aluminum (A356-T6) ratchet top cover with linear detent system for smooth reliable shifting.
-Chrome side covers available with or without kicker.
-Billet hydraulic Or mechanical kicker cover upgrade option.
-Function Formed hydraulic kicker cover upgrade option
-Cast mechanical kicker cover comes standard with early
PN 37310-39 cone style throw out bearing and 1-piece
release rod.
-Klassic Kicker Gears come
standard on kicker models.
-When designing the 4-Speed transmission we didn’t miss a thing. The holes in the 3rd and 4th gear countershaft cluster, above,
allow transmission fluid to flow through the countershaft
keeping your countershaft bearings lubricated.
f
- Our 4-Speed gears are made of high grade 8620 gear steel and heat treated using state of the art vacuum carburizing.
- All BAKER 4-Speed gears (except 1st) have helical cut lead in ramps for improved shift quality.
- 1st, 2nd, and 3rd gears ride on split needle
bearings instead of brass/bronze collars.
- Main drive gear is designed to work with 2 caged
needle bearings for longevity; the mainshaft rides on
these bearings, rather than a bronze bushing which can wear out over time.
t
a
e ure
s
-Billet steel machined and case hardened shift drum rides on 2 Permaglide bushings for
smooth repeatable shifting everytime.
-BAKER 4-Speed gearset made out of high grade 8620 gear steel; gears ride on needle
bearings instead of brass bushings.
-Direct bolt-in transmission on most models, whether you’re running a tin type
primary or open belt drive.
-1936-1964 Knucklehead™/ Panhead™ length mainshafts available.
-1965-1969 late Panhead™(1st year electric start)/ Shovelhead™ length
mainshafts available.
-1970-Early 1984 Shovelhead™ length mainshafts available.
- BAKER 4 Speed transmissions come standard with a gear drive speedometer ring gear installed
(see year / fitment for speedo drive gear ratios).
- BAKER’s 1936-1964 no ear case has a stock style alignment track and adjuster
boss, located at the bottom of the transmission, casted into the case for positive
alignment and no shifting of the transmission when under power.
toll free: 1-877-640-2004
www.bakerdrivetrain.com
- Hidden vent design allows transmission to breathe through the
top cover into the ratchet pawl system.
-Billet ratchet pawl system with hard anodized backing plate
and case hardened carrier.