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Steel Thunder Custom Cycles

152 York Drive

Marshfield, MO 65706

417-468-2326

 MOTORCYCLE TRANSMISSIONS

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Gear Sets at bottom of page.

Transmission Parts - - Drivetrain Index

Please note: When comparing prices to others, please be aware that some companies do offer lower pricing by buying engines or trannys unassembled, and then put them together themselves (thus, have no factory warrantee). All parts and/or engine, tranny, etc., sold at STCC are 100% factory assembled and warranteed.

Baker's right side drive tranny for custom frame Big Twin motorcycles

5 speed or 6 speed

Chrome and Polished

Right Side Drive

 

Made in U.S.A.

ALL BAKER TRANSMISSIONS NOW HAVE A 5 YEAR/50,000 MILE WARRANTY!

 

 

 

 

 

 

BAKER RIGHT SIDE DRIVE TRANSMISSION ASSEMBLIES FOR CUSTOM FRAME BIG TWIN

Used with a right side drive Big Twin frame these transmissions will allow the use of a 250 series wide tire and still be able to run a 1 1/2" wide drive belt. The right side drive was developed to use this massive size tire without offsetting the engine to the left side of the frame. Not only does it keep the weight mass centralized in the frame it separates the gyroscopic effect of the primary drive and the secondary drive to each side of the motorcycle.
Features

The 5 speed version includes standard ratio gears and is best suited for stock through moderately modified engines.
The 6 speed version includes standard ratio 1st through 5th gears with a .86:1 ratio overdrive. The 6 speed is best suited for a large displacement engine.
For strength all gears are full width and are manufactured by Andrews.
To eliminate a weak area normally associated with the 1980/Later type transmission, Baker has incorporated the countershaft and the countershaft's 5th gear into one piece. Chrome plated hydraulic clutch actuator/pulley cover. Chrome plated top cover with 1980/1997 type neutral switch. Fully polished transmission case manufactured by S&S. Chrome plated access door CNC machined from 6061-T6 billet aluminum. Compatible with the OE speedometer sensor. Includes 32 tooth transmission pulley.
Splined mainshaft is designed for 1990/Later style clutch. Smooth effortless shifting is accomplished by several factors:
All gear dogs have lead-in ramps.
The lighter weight of the shift drum reduces rotating inertia and has redesigned for pin grooves.
Shift forks that are made from billet steel then hard chrome plated.
Roller with torsion type spring for the shift drum detent instead of the OE type plunger/coil spring detent.
A Manufacturer's Statement of Origin is included.

5 speed. Fits our mu20087 Softail style right side drive frame found here (about center of page)
Part#:MU70316
-
Baker Right Side Drive 5 speed transmission ... $2,780.96 including free shipping*

6 speed. Fits our mu20087 Softail style right side drive frame found here (about center of page)
Part#:MU70317 - Baker Right Side Drive 6 speed transmission ... $3,501.00 including free shipping*

Baker Transmission for Softail, 5 speed or 6 speed.

5 speed or 6 speed

Chrome and Polished

Made in U.S.A.

ALL BAKER TRANSMISSIONS NOW HAVE A 5 YEAR/50,000 MILE WARRANTY!

 

More BAKER at bottom of page.

BAKER 5 & 6 SPEED TRANSMISSION ASSEMBLIES FOR SOFTAIL

CHROME AND POLISHED
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. All gear dogs have lead-in ramps for positive gear engagements. To eliminate a weak area normally associated with the 5 speed transmission, Baker has incorporated the countershaft and the countershaft's top gear into one piece. Redundant shift drum detents (roller type & plunger type for positive neutral finding). Anti-Overshift inner transmission shift linkage with improved shape return spring for dependability. Polished case with chrome plated top cover and side cover.
Lightened steel pulley with 32 teeth. 2.94:1 close ratio first gear adds approximately 5 miles per hour of usable first gear.
The 6 speed has a .86:1 ratio top gear and will reduce RPM by approximately 475. These transmissions include a single wire type neutral switch designed for 1984/1997 Softail models and can be used with an electronic speedometer sensor.
The 5 speed version is best suited for stock through moderately modified engines.
The 6 speed version is best suited for large displacement engines.
A Manufacturer's Statement of Origin is included.

5 Speed Transmission, Fits Softail Models 1990/1999 - Part#:MU70330 ... $1885.59 including free shipping*

6 Speed Transmission, Fits Softail Models 1990/1999 - Part#:MU70331 ... $2925.05 including free shipping*

 

RIGHT SIDE DRIVE 6 SPEED WITH PRIMARY DRIVE FOR CUSTOM USE from Baker Drivetrain

With D.S.S.C. = Drop Starter Slam Clutch

Right Side Drive 6 speed with Primary Drive for Custom Use.

Designed for right side drive Big Twin frames that have centered in the frame Engine.

Primary drive and tranny in one, from Baker Drivetrain.

Installs into Right Side Drive frame nice and neat!

CHAIN DRIVE

RIGHT SIDE DRIVE 6 SPEED WITH PRIMARY DRIVE FOR CUSTOM USE - Baker Drivetrain

Designed for right side drive Big Twin frames that have centered in the frame Engine. Mounts and a 1/2" left offset Transmission Mount (a Primary Spacer will not be required).
Can be used with a 240/250mm Tire and still fit a 1 1/2" wide Rear Belt. A 280/300mm Tire is possible with a 530 O Ring Chain and Offset Transmission Sprocket.
The Starter Mount location has been dropped permitting the seat height to be lowered up to 2 1/2".
By slamming the Clutch Assembly inward 2.3", the open space once occupied by the left side drive Transmission Pulley is now eliminated.
All gears are manufactured by Andrews Products Inc. and are finish ground after heat treating on a diamond coated grinder providing superior fit with minimal gear noise.
Back-cut Gear Dogs with lead-in ramps on the gear pockets provide smooth shifting with positive engagement.
Steel Shift Forks with hard chrome plating feature a cross section that is 3 times thicker than stock.
For improved acceleration, the 32 tooth hard anodized aluminum Pulley weighs a mere 2 pounds (OEM weighs 5.2 pounds).
2.94:1 Close Ratio 1st gear and .86:1 ratio 6th gear.
The 28 tooth solid mount Engine Sprocket combined with the 43 tooth Clutch Basket produces a Primary Drive Ratio of 1.54:1 (same as stock) and includes the required 88 pitch Primary Chain & Adjuster.
For maximum torque transfer, the Clutch Pack features 9 Kevlar® Friction Plates.
Includes a single pole type Neutral Switch and is compatible with the OE type electronic Speedometer Sensor (a sensor block off plate is included).
All parts are CNC machined from 6061-T6 billet aluminum.
Requires 1990/1993 Starter Motor (not included).
Includes Manufacturer's Statement of Origin (shipped separately). Made in U.S.A.

Polished - Part#:MU75500 ... $7195.37 including free shipping*



Chrome - Part#:MU75501 ...$7645.77 including free shipping*

ALL BAKER TRANSMISSIONS NOW HAVE A 5 YEAR/50,000 MILE WARRANTY!

Powerhouse 6 Speed Transmission assembly for Softail 1990/99, cast case.

Cast Case

Powerhouse 6 Speed Transmission assembly for Softail 1990/99, polished case.

Polished Case

POWERHOUSE 6 SPEED TRANSMISSION ASSEMBLY FOR SOFTAIL 1990/1999

If you have ever been cruising on the highway and tried to upshift into top gear just to find out your transmission is already in fifth gear, then that is all the proof you should require that you need a 6 speed transmission. Not only will this complete transmission assembly reduce vibration at highway speed, it will also improve fuel mileage. At 75 miles per hour, the .86:1 overdrive ratio will produce a 475 RPM reduction when shifting from fifth gear. A 2.94:1 close ratio first gear will add approximately 5 MPH of useable first gear. The second, third, and fourth gear ratios remain the same as OE. Fits Softail models 1990/1999.

Part#:MU70313 - Cast Case, Fits Softail models 1990/1999... $1,336.19 including free shipping*

Part#:MU70315 - Polished Case, Fits Softail models 1990/1999 ... $1,456.34 including free shipping!

Powerhouse Complete 5 speed tranny for Softail 1990/99, cast case

Cast Case

Powerhouse Complete 5 speed tranny for Softail 1990/99, polished  case

Polished Case

POWER HOUSE COMPLETE 5 SPEED TRANSMISSION FOR SOFTAIL 1990/1999.

  • Available with "as cast" case finish or polished case finish.
  • Features chrome plated top cover, side cover, shifter rod lever and speedometer sensor block off plate.
  • Includes 32 tooth steel pulley.
  • Gear ratios are the same as OE.
  • Just add oil and hook up the clutch cable.
  • 12 month Manufacturer's Limited Warranty.
  • Includes Manufacturer's Statement of Origin.
  • Fits Softail 1990/1999.


After extensive on-bike high mileage testing, we are proud to offer this complete POWER HOUSE 5 Speed Transmission. Simply add oil and install your clutch cable. This transmission features a chrome plated top cover, side cover, shifter rod lever and speedometer sensor block off plate. It includes a steel 32 tooth pulley, allen head cover hardware and all the required mounting stud and alignment pins installed. All gear ratios are the same as OE. Includes manufacturer's Statement of Origin and a Manufacturers 6 month limited warranty.

"As Cast" case. Fits Softail 1990/1999.
Part#:MU70307 -
Power House Cast Case 5 speed transmission ... $1148.85 including free shipping*

Polished Case. Fits Softail 1990/1999.
Part # :MU70314 -
Power House Polished 5 speed transmission ... $1300.82 including free shipping*

For wider tires and bigger engines.

Powerhouse Right Side Drive Transmission.  5 speed or 6 speed, raw or polished.

As Cast or Polished Case

 

Powerhouse tranny shown installed on softail style RSD frame.

Shown installed on Softail Style RSD frame.

Fits Custom Big Twin Right Side Drive Frames.

 

POWERHOUSE RIGHT SIDE DRIVE

Powerhouse 5 speed and 6 speed Right Side Drive Transmissions

The Powerhouse Right Side Drive transmissions were developed for wide size tire (250 series) and are best suited for high performance engines. Hydraulic and clutch type side cover. Specially designed cam for smooth shifting with bronze shifting fork.

The Right Side Drive (RSD) transmission, when mounted in a custom RSD frame will allow the use of a super wide rear tire without offsetting the engine. Available in your choice of a 5 or 6 speed with an "as cast" or polished case. Transmissions include a chrome plated top cover, shift rod lever and hydraulic clutch actuator cover. The hydraulic clutch actuator is designed to be used with a 11/16" bore master cylinder and requires a 10mm banjo bolt. The 5 speed version includes standard ratio gears and the 6 speed includes standard ratio gears with a 86:1 ratio 6th gear. For maximum strength all gear are the same width as OEM gears. The 32 tooth pulley will accept a 1 1/2" wide drive belt. The splined main shaft is designed for a 1990/Later style clutch hub. A neutral switch and speedometer sensor block off plate are included. Smooth shifting is accomplished by bronze shift forks and a roller type shift drum detent arm. Includes a 24 month Manufacturer's Warranty and Manufacturer's Statement of Origin (MSO).

Polished Case

  • mu70318 - 5 Speed RSD, stock ratio gears ... $1779.48 including free shipping*                                       
  • mu70319 - 6 Speed RSD, .86:overdrive ... $2235.29 including free shipping*                                                    

Cast Finish Case

  • mu70320 - 5 Speed RSD, stock ratio gears ... $1681.65 including free shipping*                                       
  • mu70321 - 6 Speed RSD, .86:overdrive ... $2135.39 including free shipping*                                                    

5 in a 4 transmission.

5 speed conversion motorcycle transmission, 5 in a 4

5 Speed Conversion Motorcycle Transmission - '5 in a 4'

5 speed transmission is a direct bolt in replacement on 1970-84 H-D, for the 4 speed unit. Completely assembled using replica gears, shafts and transmission case. All internal parts interchange with stock 5-speed components. Use 1980-84 FXR 5-speed transmission sprocket with offset so teeth are closer to trans case. Inner primary must be clearanced for final fitting. Available with late clutch release mechanism for 1987-up type cable.

VT17-0015 ... $1912.50 including free shipping*

Jims logo.

 

Jims right side drive tranny.

Right Side Drive

 

JIMS 6-SPEED RIGHT SIDE DRIVE TRANSMISSIONS

Innovative design has the strength and quality you need
CNC-machined billet aluminum is chrome plated
Comes with close-ratio 1st gear

FOR 00-06 RSD TWIN CAM-STYLE SOFTAIL APPLICATIONS:

DS1101-0035 - Black w/ mechanical clutch ... $3,336.26 including free shipping*


DS1101-0036 - Black w/ hydraulic clutch ... $3,361.46 including free shipping*

FOR 90-99 RSD EVOLUTION-STYLE SOFTAIL APPLICATIONS:

DS1101-0031 - Black w/ mechanical clutch ... $3,080.66 including free shipping*


DS1101-0032 - Polished w/ mechanical clutch ... $3,232.76 including free shipping*

DS1101-0033 - Black w/ hydraulic clutch ... $3,080.66 including free shipping*

DS1101-0034 - Polished w/ hydraulic clutch ... $3,232.76 including free shipping*

Note: RSD transmissions are not compatible with stock chassis and modifications will be necessary.

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.

BAKER TRANSMISSIONS - We carry the entire line of  Baker Transmissions. They are built at time of order, take approx. 2 weeks, and there are many gear choices.  Please call and chat with our tech if you need something special.  We recommend that you buy a Baker Transmission for engines 113" and larger. Or, if you are a "hard use" kind of rider. Here are some more common choices:

Baker six into four tranny for Shovelheads.

Baker's 6 into 4 transmission, available with or without Kick Start mechinism.

Six into four pulley, 33 tooth.

 

BAKER DRIVETRAIN 6 INTO 4 TRANSMISSION FOR YOUR SHOVELHEAD

Baker's 6-into-4 transmission is a direct replacement for the 1970-E84 4-speed, available with or without the time-honored 1936-84 style kicker. In a 4-speed, 4th gear is 1:1. Baker's Shovelhead 6-speed overdrive has a 1:1 5th gear and a .86 6th; good for a 500 RPM reduction in cruising RPM on the highway.


6 into 4 with Kicker ...$3080.00 including shipping*

6 into 4 without Kicker ...$2855.00 including shipping*

6 into 4 pulley 33 tooth (BD-32181S) ...$239.50 including shipping*

INSTALLATION NOTICE: The transmission bolts directly to your stock frame and your stock inner primary bolts right up. Due to the extended length of the transmission on the kicker side the rear exhaust pipe, oil tank and electric starter mounting brackets may have to be modified. Some inner primary covers require modification to clear the main drive nut. Some electric starter installations require modification of the transmission case for clearance. There is no speedo cable provision in the tranny case, but you can relocate the speedo cable to the front wheel. Another option is to convert over to electonic speedometer. An electronic speed sensor provision is in the door and it accepts factory 1994-Later style sensors.

These are special order items, please call to order.  These are built to order and take approx. 2 weeks. No returns on special orders. Toll free order line: 1-866-889-7828.

ALL BAKER TRANSMISSIONS NOW HAVE A 5 YEAR/50,000 MILE WARRANTY!

For Kicker Conversions go to Transmission Parts page.

Baker Billet Series

 

Baker's Billet Series Transmissions, in beautiful Chrome finish.Choice of left side drive 6 speed, right side drive 5 speed or Right side drive 6 speed.

Chrome

 

Baker Billet Series trannys, Polished.

Polished

ALL BAKER TRANSMISSIONS NOW HAVE A 5 YEAR/50,000 MILE WARRANTY!

NEW! BAKER BILLET SERIES TRANSMISSIONS

Baker set out to achieve superior function with no compromises in form AND beautiful form with no compromises in function and they nailed it. The new BAKER Billet Series transmissions for Evo-based Softail applications are very simply the best transmissions that money can buy, period. Here’s why:
TOP cover and trap door profiles perfectly match that of the case.
6-BOLT doweled top cover.
NO mold parting lines or mismatched areas due to casting.
NO circumcised cast case "dingy" profile, near the trap door. The “barrel” of the tranny case blends perfectly into the trap door profile.
THE case is effectively “shrink-wrapped” around the “envelope” of the gears to yield the smallest, tidiest tranny case available.
STRUCTURAL rigidity gains from the billet case and doweled top cover yielded significant NVH (noise & vibration harshness) improvements and a reduction in air born noise. English translation: It is the smoothest and quietest shifting transmission available, period.
AVAILABLE with the speed sensor hole in the door, case, or neither.
AVAILABLE with or without neutral switch.

Baker Billet Series - Softail LSD OD6 (Left Side Drive, 6 speed)

90-99 w/ Chrome Finish (Part#BD-701CB) $3255.50 including shipping*

90-99 w/ Polished Finish (Part#BD-701PB) $3165.5 including shipping*

Baker Billet Series - Softail RSD 5 (Right Side Drive, 5 speed)

90-99 w/ Chrome Finish (Part#BD-R501CB) $2756.00 including shipping*

90-99 w/ Polished Finish (Part #BD-R501PB) $2576.00 including shipping*

Baker Billet Series - Softail RSD 6 (Right Side Drive, 6 Speed)

90-99 w/ Chrome Finish (Part#BD-R701CB) $3476.00 including shipping*

90-99 w/ Polished Finish (Part#BD-R701PB) $3296.000 including shipping*

These are special order items, please call to order.  These are built to order and take approx. 2 weeks. No returns on special orders. Toll free order line: 1-866-889-7828.

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 FREE 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.

These are special order items, please call to order.  These are built to order and take approx. 2 weeks. No returns on special orders. Toll free order line: 1-866-889-7828.

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.

For 6-Speed Transmissions.

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 ... $121.49 including shipping* ETA 3/2/07

Transmission Parts such as Gear Sets, Builder's Kits, End Covers, Top Covers, Shifter Drum Kit, Rebuild kits, Cases, etc. can be found on TRANSMISSION PARTS page.

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