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Heavy Duty Throwout Bearing Kit

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 free play.

Performance clutches are even harder on that little bearing. The BAKER Heavy Duty Throwout bearing kit was developed to address the failures of the stock clutch throwout bearing in 1987-up applications with the ball-and-ramp actuator and the larger thrust bearing features a 97% greater surface area and 77% greater static load capacity than the stock bearing.

  • 1987-up applications*


*will not fit 2018 models with Factory Hydraulic clutch

  • 97% greater surface area
  • 77% greater static load capacity

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.

Heavy Duty Throwout Bearing Kit
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Customer Reviews

4.7 Based on 13 Reviews
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  • customer
  • bike
  • stuff
  • noise
  • improvement
  • shift drum kit
  • gasket set
  • seals
  • sprocket spacer
William A.
United States
  • What model motorcycle do you ride? Harley Davidson

Fixed it

Fixed the heavy handle I've had for years and years with the heavy clutch spring. . Hasn't been this easy to pull in decades. The next test is to see how long it lasts.

William A. verified customer review of Heavy Duty Throwout Bearing Kit
  • What model motorcycle do you ride? 1990 HD Fatboy

No more noise

My '90 Fatboy always made a noise from the throwout bearing. Replaced it with the Baker Drivetrain Heavy duty kit and now it is silent and works perfectly. Happy with the improvement of the iconic bike.

United States

Don’t use Baker

First off parts arrive, open up and the throwout bearing is missing from the kit... is that not the main part of the kit?!? How does a company not inspect kits before shipping out. Then when I do receive everything the kit did not work with my bike as I was told. Return parts for refund that were received by Baker within 2 days of shipping back and it takes multiple weeks to get a refund and only after multiple emails asking for it. In short I will not ever use Baker Drivetrain again or recommend them to anyone after my experience and then reading other negative reviews online. Terrible business and customer service

Greg M.
United States
  • What model motorcycle do you ride? 2012 street glide

Smooth Shifting 2

I had installed a smooth shift drum kit and while I was in there, I upgraded to the HD throw out bearing kit. Also used all of Baker's goodies to go with it. Primary gasket set, seals, sprocket spacer. You should look at all of this while you are in this deep. Baker makes quality $hit, second to none. Now customer is ready for big bore kit this winter with no worries. Keep em' coming out Bert. Great stuff.

Michael U.
United States

Baker Throwout Bearing Kit

As always, Baker Drivetrain comes through once again with another Premium Part. I have ordered in the past and have been very satisfied. This time was no different. Although I have yet to install the part I can honestly say I am going to be very happy with it when I do. Thanks to All at Baker Drivetrain. You Guys Rock!

Web Product ID: 7432436099
Baker Drivetrain Team Illustration