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Drivetrain products for Harley-Davidson®
There's no comparison to BAKER Drivetrain products. Our firm commitment to quality American-made parts—designed and built by the people who ride them—delivers an uncompromising product that lasts.
Improve the performance of your American V-Twin Harley-Davidson®
BAKER Drivetrain was started in 1998 because engines were making more power, but nobody was taking the drivetrain seriously. Choose the right drivetrain, chassis, and rear wheel to put the power to the ground.
All BAKER aftermarket motorcycle parts are designed and manufactured right here in America. BAKER Drivetrain continues to introduce new solutions based on empirically-based inspiration as they ride their American V-Twins and get ideas from their American riding buddies using their proven engineering methodologies.
The components for the Harley-Davidson® drivetrain aftermarket we offer are broken up into 4 catalogs: Cruise Drive era (2007-later), 5-speed era (1984-2006), 4-speed era (1936-86), and Custom/Performance (includes Big Dog and Sportster/Buell).
Armored Attitude Adjuster
$ 299.00
Stronger than the original for those with more abusive inclinations! The BAKER Armored Attitude Adjuster is an insurance policy for your motorcycle in the form of a manual chain tensioner...
34-Tooth Compensator Sprocket for Twin Cam & M8 Models
$ 129.00
BAKER Drivetrain unveils the final solution to the late model compensator problems. The BAKER Drivetrain compensator sprocket is engineered with an annular oil distribution system that scavenges primary oil and...
GrudgeBox Builder's Kit
$ 3,695.00
The GrudgeBox is a tough overdrive 6-speed to replace your stock 6-speed! The GrudgeBox was engineered with a focus on excessive torque capacity and crisp shifting. All gears are straight...
High Torque Bearing Kit
$ 17.99
The 34091-85 inner bearing race has been used on Big Twins since 1985. The inner primary bearing rides on this race. By design, this race press-fits onto the transmission mainshaft. This...
Truss Style Shift Lever Kit
$ 99.00
Known to fail, BAKER took the all-too-common-looking stock shifter and improved it in every way with a new design. The most common issue with the stock transmission shift lever...
Transmission Rebuild Kits
$ 379.00
Features This kit was put together to assist you with that high mileage rebuild. When your transmission has reached its limit of efficiency and smooth shifting, it’s time for that...
Spectro Gear Lube
$ 30.43
Picking the right transmission fluid ensures the life and durability of your transmission, that’s why BAKER recommends a fully synthetic GL-5 rated gear weight oil of 75W-140. The Spectro Heavy...
Anti Overshift Ratchet Pawl
$ 249.00
The stock ratchet pawl used from 1980 to 2000 utilized scissor spring that was well known for breaking. The unfortunate side effect of this failure is the broken spring leg...
Heavy Duty Throwout Bearing Kit
$ 99.00
People have been griping about the 37311-75 throwout bearing since it was introduced into Big Twins in 1975. Failures occur when the clutch cable is inadvertently adjusted with little to no...
OD6: Overdrive 6-Speed Builder's Kit
$ 3,195.00
This is the ORIGINAL 6-speed design that revolutionized the American V-Twin industry. It’s still the best overdrive 6-speed built to this day…hands down. Our OD6 is built to comfortably handle...
Spectro Primary Oil
$ 13.88
Picking the right primary fluid ensures the life and durability of your primary, that’s why BAKER recommends a 85W primary oil like the Spectro Heavy Duty Primary Oil. This Spectro...
F6R: Factory 6-Speed Reverse
$ 2,695.00
Designed, manufactured, tested, proven and beloved - the industry's leading reverse drive for Harley-Davidson is the easiest to use and most worry-free system. Our non-invasive reverse gear system was designed...
Countershaft Bearing Service Tool Kit ToolE-07
$ 159.00
This is a service tool kit in order to remove the stock countershaft bearing in 2007-Later Harleys. P/N ToolE-07 Fitment 2006-Later Dyna and 2007-Later Touring & Softail Benefits This...
Factory 6-Speed Tapered Roller Bearing Kit
$ 995.00
Heal your Achilles heel with the BAKER Main Drive Gear Bearing Kit for 2007-up Big Twins! P/N 640-67 Kit includes BAKER double tapered roller bearing assembly Replacement HD main...
Replacement Pawl Shaft Seal
$ 6.99
This is a replacement pawl shaft seal that we found to last the longest. Fitment Size 4.37 x .875 x .25
N1 Shift System
$ 349.00
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...
DD6: Direct Drive 6-Speed Builder's Kit
$ 3,195.00
* Limited supply of chrome bearing doors with ear available. Please give us a call at 517-339-3835 to order a chrome bearing door. From an engineering standpoint, it is difficult...
Hydraulic Side Cover
$ 525.00
'07-'17 Fitment Taking design cues from our ever increasing product family known as Function Formed, we have wrapped the outer design around the functional components found inside. No garnish, or...
Replacement Main Drive Gear Bore End Seal
$ 9.99
This is a replacement main drive gear bore end seal. It's great! Fitment Size: 25 x 32 x 06
Spacer for Sprocket or Pulley
$ 27.99
33344-94S If you are a seasoned technician, you have seen a severely worn sprocket spacer. Over time and miles with dirt and grit, the stock 33344-94 spacer is too soft...
Cruise Drive Primary Bundle
$ 999.00 $ 997.00
This kit is everything you need to update your cruise drive primary. It includes: Product Part Number Retail Cost Comp Sprocket 730-67 or 730-M8 $599 Armored Attitude Adjuster 177-67...
DD7: Direct Drive 7-Speed Builder's Kit
$ 3,695.00
The DD7 upgrades any existing 2006-later big twin 6 speed to a full 7 speed transmission. The BAKER DD7 is more than just another gear added to the mix for...
Primary Chain Adjuster Shoe
$ 49.00
Replacement Fat Shoe for special applications. Fitment: Please refer to the Sprocket/Chain Matrix in order to figure out fitment. PN DD6-178
Transmission Dipstick
$ 29.00
Have you ever heard of a 5-speed transmission dipstick breaking off and working its way into the gearbox with disastrous results? Ask any seasoned technician; he’s seen one. The low...
Replacement Neutral Switch
$ 14.25
Replacement neutral switches that have been tested to be dependable. See the next "Fitment" tab to identify which is for the application that you need. Fitment Application 1: PN 21-436 (Fitment...
Red Line Heavy ShockProof Gear Lube
$ 23.97
Picking the right transmission fluid ensures the life and durability of your transmission, that’s why BAKER recommends a fully synthetic GL-5 rated gear weight oil of 75W-140.The Red Line Heavy...
Street Door
$ 395.00
The Street Door is manufactured with 6061-T6 aluminum and features 28% wider bearings over stock. The bearings are retained with a 6-bolt steel 1/8″ plate, phantom clutch lever movement is...
Cruise Drive Smooth Shift Kit
$ 399.00
The design principles that made our Six-Speed Overdrive shift so smooth were applied to create a shift drum kit that will bolt onto any cruise drive 6-speed and give super...
Fine Tooth Adjustment Kit
$ 159.00
The BAKER primary chain adjuster bracket looks like the stock 39990-01 style bracket but has 28% more adjuster teeth. The finer pitch teeth make it easier to dial in your...
30-Tooth Compensator Sprocket Kit
$ 129.00
The 30-Tooth Comp Sprocket Kit made it on the 2024 Powersports Business Nifty 50 List! Check out the Nifty 50 list here. WAKE UP YOUR ENGINE! The NEW BAKER 30-Tooth...
Early Model Comp Sprocket
$ 395.00
Sprocket for the 1985-2006 (except 06 Dyna) compensator. Sprocket & Chain Matrix Features American made heat treated sprockets, which will help with torque increases. 22 tooth 14% increase BenefitsIt’s...
Billet Speedometer Sensor
$ 139.00
Our simple, sleek and clean show polished speedometer sensor keeps a stylish low profile to the transmission case. For those with an attention to detail, this is certainly a noticeable...
The BAKER Cable-Type Side Cover
$ 299.00
The NEW BAKER Cable-Type Side Cover was designed with minimal waste and purposeful mechanical intent. Machined from certified 6061-T6 Billet Aluminum, compatible with OEM or aftermarket transmissions. The BAKER Cable-Type...
DD7 Main Drive Gear Tapered Roller Bearing Kit
$ 995.00
Heal your Achilles heel with the BAKER Main Drive Gear Bearing Kit for the BAKER Direct Drive 7-Speed. P/N 740-67 Kit includes BAKER double tapered roller bearing assembly Replacement DD7 main...
DD6: Direct Drive 6-Speed Complete Transmission
$ 4,395.00
* Limited supply of chrome bearing doors available. Please give us a call at 517-339-3835 to order a chrome bearing door. If you enjoy riding for long periods of time...
DD7: Direct Drive 7-Speed Complete Transmission
$ 6,395.00
This is for a complete transmission, case and all. The sprocket/pulley is not included in the complete transmission assembly. For the acquisition of these components, kindly contact BAKER Drivetrain at...
Ignition Kill Shift Kit
$ 359.00
This slick 5-speed left side drive ignition kill shift kit from BAKER Drivetrain was developed for one thing in mind, Winning! Anybody who wants to launch hard and then up...
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Haslett, Michigan 48840 USA | Call Us: 517-339-3835
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