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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...
Primary Rebuild Kits
$ 119.00
This all-inclusive convenient kit is designed to freshen up those high mileage bikes, prevent leakage, and includes everything you’ll need after opening up your primary. Includes gaskets, seals and O-rings....
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...
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...
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...
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...
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...
+1.5 Oil Pan
$ 795.00
Keep your 2009-2016 Touring Model cool. Todays Big Twin engine makes a lot more power and a lot more heat than its predecessor of 20 years ago. In 1993, the...
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...
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...
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...
Cruise Drive Upgrade Bundle
$ 1,850.00
This discounted bundle will help repair your stock Cruise Drive transmission. Normally, these parts would cost: Part Normal Retail Cost Primary Rebuild Kit $149 for M8 applications Street Door $395...
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...
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...
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Haslett, Michigan 48840 USA | Call Us: 517-339-3835
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