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Steel Thunder Custom Cycles

152 York Drive

Marshfield, MO 65706

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 Motorcycle Transmission Parts

Drivetrain Section Index - - Transmissions

BAKER DRIVETRAIN - direct drive 6 speed builder's kit for Big Twin.

BAKER DRIVETRAIN

Direct Drive 6 Speed Builders Kits for Big Twin

DIRECT DRIVE 6 SPEED BUILDERS KITS FOR BIG TWIN - Baker Drivetrain

Direct Drive means that the 6th gear has a 1:1 ratio (for 1 revolution of the input shaft, the output shaft turns 1 revolution) which is the same as an OE 5 speed.
By including a 28 tooth compensating sprocket and a longer primary drive chain, the overall drive ratio is exactly like a .86:1 overdrive 6th gear but with the 99% mechanical efficiency of a 1:1 ratio drive.
All gears are finish ground on diamond coated tooling after heat treating to produce a super fine surface for holding exact tolerances and eliminating gear mesh noise.
Chrome plated access door.
Fourth, fifth and sixth gear sets have helical cut gear faces to further reduce gear noise.
One piece design of the countershaft and sixth gear eliminates the weak point found in the OE transmission.
Redundant (roller and plunger type) shift drum detents for positive neutral finding.
Anti-overshift inner transmission linkage with improved shape return spring for dependability.
The 28 tooth compensating sprocket yields 14% more starter motor torque to the engine. Made in U.S.A. PRICES INCLUDE FREE SHIPPING*

Model & Year Part # Price Buy Now
Softail 1998/1999 MU72735 $2245.46
Softail 2000/Later MU72737 $2245.46
FXR 1999 MU72736 $2245.46
Dyna 1998/2000 MU73737 $2245.46
Dyna 2001/Later MU72736 $2245.46
FLH & FLHT 1998/2000

MU72736

$2245.46
FLH & FLHT 2001/Later MU72738 $2245.46

Sportster and Buell 6-speed transmission gear set from Baker Drivetrain.

Ratio Chart
Gear
Stock 5spd
Baker XL 6 spd
1st
2.69
2.52
2nd
1.97
1.96
3rd
1.43
1.44
4th
1.18
1.18
5th
1.00
1.00
6th
N/A
0.86
RPM Chart
MPH
RPM in Fifth
RPM in Sixth
RMP Reduction
65
3162
2719
443
70
3405
2928
447
75
3648
3137
511
80
3891
3346
545
NOTE: Data based on a 56/35 primary reduction, 61/27 secondary reduction and a 25" dia. rear tire.
6-SPEED TRANSMISSION GEAR SET FOR XL (SPORTSTER) AND BUELL - Baker Drivetrain

Gear set reduces the rpm at highway speed, adding life to the motor.
Includes gears, trapdoor, shifter drum, shifter forks and derby cover.
Redesigned shift drum and detent plate supply improved geometrics for smoother shifting..
Gears are full-width for uncompromised torque capacity and strength.
For ease of installation use existing main drive gear set (you do not have to remove the main 5th gear from the case).
Made in the U.S.A. Prices include shipping*.

Part #: DS-78061275 - For S&S XL motor... $2,156.36


Part #: DR-DS326101 - For 95-03 XL, Buell... $2,151.86

Part #: DR-DS326102 - For 91-94 XL, Buell... $
2,151.86

Note: It is recommended that for 94 applications the newer style gears (95-02) be used (OEM #35034-94 mainshaft 5th gear and 35633-94 5th gear countershaft). If the earlier gears are used, it may cause a gear whine that will in no way cause a mechanical problem. Note: Installation of this kit requires the removal of some case material and H-D special tools.

Please note: These are special order items. While most items ship the same or next business day, these items will take a few extra days to ship. No express delivery is available. No returns on Special Order items.

 
NOTE: There are no 6-speed transmissions available for 04/L Sportsters. Due to the new design of the engine cases, most likely there will not be any 6-speeds for these models available in the future.
Jims Chrome Plated transmission end cover for Big Twin 5 speed.

CHROME PLATED TRANSMISSION END COVER KIT FOR BIG TWIN 5 SPEED - JIMS

CNC machined from billet aluminum to provide maximum strength with minimal flex when using a high pressure clutch spring. Can be used with your existing clutch release mechanism or our MU73266. Made in the U.S.A.

Fits Big Twin 1987/Later(except FXR) - Part#:MU70547 ... $171.62 including shipping*

NEW

Ball Milled style hydraulic transmission end cover for Big Twin 5 speed.

Smooth style hydraulic transmission end cover for big twin 5 speed motorcycles.

 

HYDRAULIC TRANSMISSION END COVERS FOR BIG TWIN 5 SPEED - V-FACTOR

Chrome Plated.
Designed to convert your cable operated clutch to a smooth action hydraulic-type clutch.
The hard anodized piston can withstand years of constant punishment and be used with a 9/16" or a 5/8" bore master cylinder.
The 10mm banjo bolt includes sealing washers and is located on the bottom of the cover for a clean look.
A top mounted bleeder valve helps to simplify installation.
CNC machined from 6061-T6 billet aluminum for strength.
Includes custom fill plug with dip stick and mounting hardware.

Part#: MU70556 - Ball Milled Style, Fits Big Twin 5 Speed 1987/2006 ... 147.24 including shipping*


Part#: MU70555 - Smooth Style, Fits Big Twin 5 Speed 1987/2006 ... 147.24 including shipping*

EXCEL hydraulic clutch housing for Big Twin 5 speed, available in polished or chrome.

HYDRAULIC CLUTCH HOUSING FOR BIG TWIN 5 SPEED - EXCEL

Designed to eliminate the clutch cable providing smoother clutch operation. This eye-catching clutch housing is made of 6061-T6 billet aluminum and includes stainless steel allen head mounting bolts. The button head fill plug is centrally located to help ease in transmission fluid installation. The hydraulic line connection is designed to be used with a 10mm banjo bolt and is located near the bleeder screw at the bottom rear of the housing for a clean appearance. For best results and matching appearance, use with our EXCEL left hand master cylinder MU44601 or MU45241 (handlebar controls page). Fits Big Twin Models 1987/Later. Made in the U.S.A.

Polished. - Part#:73322 ... $263.65 including shipping*


Chrome plated. - Part#:73323 ... $299.30 including free shipping*

Chrome plated transmission top cover kit from Jims.

CHROME PLATED TRANSMISSION TOP COVER KIT FOR BIG TWIN 5 SPEED - JIMS

Fits FLT & Softail models 1998/1999. Also fits FLT & Softail models 1987/1997 if used with shift drum HD 33320-98 and neutral switch HD 33902-98. CNC machined from 6061-T6 aircraft quality billet aluminum, this Top Cover will transform the appearance of your transmission into a highly technical state of the art look. Top cover screws and gasket included. Made in the U.S.A.

Part#:MU70548 ... $165.50 including shipping*

Transmission Top Cover for Big Twin 5 speed.

TRANSMISSION TOP COVER FOR BIG TWIN 5 SPEED - V-Factor

OE style die cast replacement Transmission Top Cover fits Big Twin 5 speed 1987/1999 (except TC88 " & Dyna models). Chrome Plated. (Rpls. HD 34468-86A).

Part#:MU70524 ... $55.25 including shipping*

Shifter Drum Kit for Big Twin 5 Speed from Baker.

SHIFTER DRUM KIT FOR BIG TWIN 5 SPEED - Baker

Smoother Shifts.
Dramatically improves the way your transmission shifts.
A roller/detent design allows the Shift Drum to rotate to the correct position easily (OE style uses a plunger/detent).
Neutral is easy to find due to the dual neutral detents.
The geometry of the Shift Fork Pin Grooves are designed and CNC machined for smoother shifting.
Unnecessary material has been removed from the Shift Drum to help reduce rotating mass.
CNC machined 6061 T-6 extrusion stock aluminum Shift Drum Supports with included bearings.
Shift drum end play is preset.
Includes instructions. Made in the U.S.A.
For best results, we recommend using our Baker Inner Transmission Shift Linkage MU70050.

Fits Big Twin 5 Speed 1980/1997 - Part#:MU70051 ... $191.60 including shipping*


Fits Big Twin 5 Speed 1998/2000 (except TC 88B) - Part#:MU70053 ... $191.60 including shipping*


Inner Transmission Shift Linkage for Big Twin 5 speed from Baker Drivetrain. Anti- overshift feature.

INNER TRANSMISSION SHIFT LINKAGE FOR BIG TWIN 5 SPEED - Baker

The beak shaped pivot end on the shifter shaft lever provides an anti-overshift feature when upshifting extremely hard.

The hairpin type return spring is wound from a rectangular shaped spring steel to help prevent premature breakage.
The shaft splines are hobbed on a gear cutter for superior strength.
Great for stock replacement or high abuse applications.

Fits Big Twin 5 Speed 1980/2000 (Except TC88B) - Part#:MU70050 ... $97.50 including shipping*


Muller Kicker for 5 speeds.

DS1112-0014

Kicker arm for Muller kicker.

DS1112-0017

THE MÜLLER KICKER FOR 5-SPEEDS

Classic style with up-to-date technical developement – the patented German Müller kicker kit.
This kicker holds the world record in minimum space requirements.
Because of its minimum measurements, only .905” added to the original gearbox cover, it is possible to install this high-gloss polished kicker in combination with the original exhaust system and most after market systems without modification.
Electric starter works completely independently.
Kicker kit for all 5-speed models comes ready to install with all required accessories.
Installation of new ignition system is advised.
Chrome-plated steel, large ergonomic shaped kicker arm stands up to heavy forces and will not bend (must be ordered separately).
7° inward curve of kick arm allows more space and freedom of movement for legs.
Made in Germany. U.S. Patent #5,497,739. Prices include shipping*

Part #: DS1112-0016 - For 00-06 FXST/FLST ... $1,369.95


Part #: DS1112-0015 - For 99 FXST/FLST ... $1,369.95  

Part #: DS1112-0014 - For 88-98 FXST/FLST ... $1,369.95  

Part #: DS1112-0017 - Replacement Kicker arm $... 434.95 

Kick Start Conversion Kit.

 

KICK START CONVERSION KIT FOR BIG TWIN - V-Factor

Includes everything needed to convert electric start to kick start on all Big Twin models with 4 speed transmissions. Included in kit are chrome plated kick arm and chrome plated return spring.
Kick start conversion kit.

Polished End Cover - Part#: MU71300 ... $146.20 including shipping*


Chrome Plated End Cover - Part#: MU71301 ... Part#:MU71301 ... $157.22 including shipping*



Transmission rebuild kits for 1980/early 1984 5 speed from Jims.MU74034

Transmission rebuild kit for late 84/90 5 speed from Jims.MU74035

Transmisson rebuild kit for 91/98 5 speed and Jims 6 speed 91/98.MU74036

Transmission rebuild kit for 99/Later 5 speed and Jims 6 speed 99/L.MU74033

TRANSMISSION REBUILD KITS FOR BIG TWIN 5 & 6 SPEED - JIMS


JIMS "A Cut Above" Time Saver Transmission Kits are designed to simplify the order process when you are rebuilding your existing transmission of building one from scratch. All kits include the necessary gaskets, seals, bearings, snap rings and thrust washers. Made in the U.S.A.

1980/Early 1984 5 speed - Part#:MU74034 ... $183.41 including shipping*




Late 1984/1990 5 speed - Part#:MU74035 ... $226.34 including shipping*




1991/1998 5 speed. Also fits Jims 6 speed 1991/1998 - Part#:MU74036 ... $202.51 including shipping*



1999/Later 5 speed. Also fits Jims 6 speed 1999/Later - Part#:MU74033 ... $212.84 including shipping*

Torque arm support bracket kit for FXR 84/94.

MU72220

Torque arm support bracket kit for Softail 86/99.

MU72224

Torque arm support bracket kit for Dyna 91/98.  Carlini, made in the U.S.A.

MU72219

TORQUE ARM SUPPORT BRACKET KITS FOR BIG TWIN - CARLINI

Reduce structural stress and flexing between the engine and transmission with one of these chrome plated billet aluminum Torque Arm Support Bracket Kits. Manufactured in the USA and machined from T-6 Aluminum, these brackets bolt to the right side of Big Twin Models for additional strength and support the drive line thereby reducing the possibilities of cracking the engine, primary or transmission cases. In addition these support brackets increase cornering stability, especially in Dyna models, and are extremely effective on modified monster engines. These Torque Arm Support Bracket Kits work with stock controls, include all necessary mounting hardware and install easily in 30 minutes or less. Installation instructions included. Made in the U.S.A. These DO NOT FIT Motorcycles with Engine or Transmission Offsets for Wide Tires.

CARLINI Fits FXR 1984/1994. - Part#:MU72220 ... $321.93 including free shipping*



CARLINI Fits Softail Models 1986/1999. - Part#:MU72224 ... $297.86 including shipping*


CARLINI Fits Dyna Models 1991/ 1998. - Part#:MU72219 ... $297.86 including free shipping*

NOTE: These DO NOT FIT Motorcycles with Engine or Transmission Offsets for Wide Tires.

re-calibration module for electronic speedometers.  Dakota digital speed generator interface.
RE-CALIBRATION MODULE FOR ELECTRONIC SPEEDOMETER

Necessary to correct the OEM speedometer read-out when the final drive ratio or rear tire diameter has been altered.
Can also be used to correct non-ratio modified models with the OEM electronic speedometer that read wrong straight from the factory.
Push button adjustments make it easy to set.
Plugs directly into OEM wiring harness.
Includes calibration instructions.

Fits all models with electronic speedometer 1996/Later. Corrects speedometer readout.
#CC310669 ... $124.99 including shipping* ETA 3/2/07
NYC Choppers 3-D style maltese cross kicker pedal.

KICKER PEDAL - NYC Choppers

  • New 3-D-style Maltese Cross kicker pedal.
  • Billet aluminum construction.
  • Bright chrome finish.

Part #: DS1112-0012 - 3-D Maltese Cross kicker pedal ... $139.98 including shipping* 

NOTE:  This is a special order item.  While most items ship the same or next business day, these will take a few extra days to ship.  No express delivery available.  No returns.

Maltese Cross kicker pedal from Choppers Inc.

Kicker Pedal - Choppers Inc.

  • Black powder-coated billet aluminum kicker pedal.
  • Iron Cross design.
  • Includes center axle.
  • Made in the U.S.A.

#DS1112-0011 - Iron Cross Kicker Pedal ... $149.26 including shipping*

NOTE:  This is a special order item.  While most items ship the same or next business day, these will take a few extra days to ship.  No express delivery available.  No returns.

Gear Sets for Sportster & Sportster performance items (including Tranny) HERE.

Complete Transmissions here.

*FREE SHIPPING APPLIES IN CONTINTENTAL 48 UNITED STATES ONLY. AK, HI and APO/FPO will have additional shipping fees. We ship only within the U.S.A. and to APO/FPO (military addresses; weight and size restrictions apply.). We do not accept foreign credit cards. We do not ship to Puerto Rico.

Prefer to call in your order to Steel Thunder? Call toll-free: 1-866-889-7828. 9-5 CST M-F.

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Please note that all prices are subject to change.