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Softail Belt Drive

Having an open belt drive is one of those traits of a cool chopper. The mechanical nature of an open belt whippin’ in the breeze gives that element of nostalgia that is so popular in the V-twin dominated world we all love. We agree and tried to build on that cool factor with some modern-day BAKER engineering. Our 2.4" wide belt rides on Zinc plated 1045 steel pulleys. We used larger 14mm teeth and forged outboard support to add as much strength as possible. Our 11 plate clutch design will handle up 120 ft-lbs of continuous use right out of the box. Our 1 piece jackshaft is exponentially stronger than stock, and when matched with our 1 piece clutch basket design, will yield years of reliable starting that we all come to expect these days. Not being happy with a product that just works great, we pulled out our design pencils and did our best to add the same level of aesthetic style to complement the strength of the mechanical design.

Softail Belt Drive Contents, Old PN SBD-1/2-S


  • Zinc plated steel pulleys
  • One piece steel clutch basket
  • One piece starter jackshaft
  • 2.4" Wide proprietary belt
  • Forged aluminum outboard support (dog bone) and pulley covers
  • Available with a show polished or black anodized finish
  • Available as a 0" or 1/2" offset configuration
  • Backed by a 2yr limited warrant
  • 28 tooth zinc plated 1045 steel pulley up front and a 43T zinc plated 1045 steel pulley in the rear
  • 1.58 pulley ratio yields a 7% increase in torque to the rear wheel on stock softails from 1994-2006
  • One piece 66 tooth 1045 steel ring gear  is mated to a 9 tooth one piece jackshaft that rides on an impregnated bushing
  • 2.4" Wide proprietary belt with 14mm teeth
  • 11 plate clutch pack holds up to 120 ft-lbs of continuous use while the tight tolerance clutch baskets all but eliminates the ‘neutral clutch rattle ‘ most belt drives suffer from
  • Forged 6061-T6 aluminum outboard support (dog bone) and pulley covers
  • Motor plate and edge guard are machined from 6061-T6 billet plate stock
  • Available with or without support, in either polished or black anodized finishes
  • Available as a 0" or 1/2" offset configuration
  • 1990-2006 Softail & Custom


As shown below left, is a used aftermarket clutch basket, made from Aluminum. As you can see, after time, the vibration of the clutch pack inside the basket wears grooves in the flanks of teeth. Anyone who has wrenched for at least one riding season has seen this phenomenon in the flesh. These wear marks when they start, cause clutch disengagement issues, shifting issues and trouble finding neutral.  When they get to be as bad as this picture, you have to replace the entire basket at your expense. The wearing of the clutch plates into the basket and the belt into the pulleys is why we designed our belt drive with 1045 steel pulleys. The same material we used on our secondary drive pulleys. Also pictured is a common aftermarket belt (on the bottom) with 8mm teeth, our 14mm tooth belt is just above it.  The larger tooth size has more meat to it, and thus can hold more force per tooth. If a 14mm tooth belt size can drive the supercharger on a 500ci Top Alcohol Dragster motor, your bad ass Harley will be just fine.

Belt Drive Clutch Baskets, Aftermarket vs BAKER

Belt Tooth Comparison, BAKER vs Aftermarket



Softail Belt Assembly Cutaway


New PN Old PN Description Fitment
SBD-002-NS SBD-0-NS* No Offset, No Outboard Support, Polished 1990-06 Softail & Custom
SBD-002-S SBD-0-S* No Offset, Outboard Support, Polished 1990-06 Softail & Custom

No Offset,

Outboard Support, Black Anodized

1990-06 Softail & Custom
SBD-1/202-NS SBD-1/2-NS* 1/2" Offset, No Outboard Support, Polished 1990-06 Softail & Custom
SBD-1/202-S SBD-1/2-S* 1/2" Offset, Outboard Support, Polished 1990-06 Softail & Custom




Recommended Upgrades

  • Long Life Steel Pulleys
  • Chain Sprockets

Click on any of the images below to learn more

Long Life Steel Pulley

Chain Sprocket

Installation Instructions


BAKER Softail Belt Drive Installation Instructions: Click Here
BAKER Softail Belt Drive Exploded Views: Click Here


Standard Gear Case Finish Examples (Not applicable to all products)




Wrinkle Black

These example finishes are intended to show the exterior treatments of cases, top covers and doors.

TERM AND CONDITIONS                                                                                         

  • BAKER Drivetrain reserves the right to change prices, terms or policies at any time without notice.
  • Orders can be pre-paid using Visa, MasterCard, American Express, Discover or PayPal.
  • All orders not pre-paid will be sent C.O.D. certified check or money order only unless pre-approved for company check acceptance.
  • Any orders from outside the USA must be pre-paid in US funds via wire transfer; a $30 transfer fee will apply.
  • Prices shown are F.O.B. Haslett, MI.


BAKER™ transmission assemblies, transmission kits, primaries, and oil pans are guaranteed to the original purchaser to be free of manufacturing defects in materials and workmanship for a period of 5 years from the date of purchase or up to 50,000 miles. BAKER™ clutches, kicker cover kits, belt drives, F6F kit, reverse systems, covers and accessories are guaranteed to the original purchaser to be free of manufacturing defects in materials and workmanship for a period of 2 years from the date of purchase or up to 24,000 miles - whichever occurs first. If the product is found by BAKER™ to be defective, such products will, at the option of BAKER™, be replaced or repaired at cost to BAKER™. 

In the event warranty service is required, the original purchaser must call or write BAKER™ immediately with a description of the problem. If it is deemed necessary for BAKER™ to make an evaluation to determine whether the transmission assembly or transmission kit or accessory is defective, the entire transmission assembly, whether originally purchased as an assembly or kit, must be properly packaged and returned prepaid to BAKER™ with a copy of the original invoice of purchase. If after an evaluation has been made by BAKER™ and a defect in materials and/or workmanship is found, BAKER™  will, at BAKER™  option, repair or replace the defective part of the assembly. 


Due to the uniqueness, low price and assembly outside of typical production process of products indicated as Insider Special products, purchasing these Insider Special products include a warranty so to guarantee the original purchaser to be free of manufacturing defects in materials and workmanship for a period of 1 year from the date of purchase or up to 12,000 miles. We have provided extended options for you to purchase below. 


Any merchandise returned for any reason (exchange, credit or modification) must be accompanied by a Return Goods Authorization (RGA) number or it will be refused. Call BAKER™ to obtain this number prior to returning goods for any reason. There is a 15% re-stocking fee for all returned items. BAKER™ is not liable for any shipping charges. 


NOTE: Limited warranty does not cover labor or other costs or expenses incidental to the repair and or replacement of BAKER™ products.

This warranty does not apply if one or more of the following situations is judged by BAKER™ to be relevant: BAKER™ OEM transmissions; (these are subject to the OEM manufactures warranty only), Improper installation, accident, modification (including but not limited to use of unauthorized parts, transmission oils or lubricants), racing, high performance application, mishandling, misapplication, neglect (including but not limited to improper maintenance), or improper repair. 

BAKER™ shall not be liable for any consequential or incidental damages arising out of or in connection with a BAKER™ transmission assembly, transmission kit, component or part. Consequential damages shall include without limitation, loss of use, income or profit, or losses sustained as the result of injury (including death) to any person or loss of or damage to property.

BAKER™ transmissions, transmission kits and accessories are designed exclusively for use in American V-Twin motorcycles. BAKER™ shall have no warranty or liability obligation if BAKER™ parts are used in any other application.

If it is determined that a BAKER™ product has been disassembled during the warranty period for any reason, this limited warranty will no longer apply unless you were instructed to do so by a BAKER Drivetrain technician for diagnostic purposes.

The words H-D®, Softail®, FXR®, Dyna®, FLT®, FLH®, Sportster®, and Buell® are registered trademarks and are for reference only.

Softail Belt Drive
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Web Product ID: 2439586447438
Baker Drivetrain Team Illustration