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Factory 6-Speed Tapered Roller Bearing Kit

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 drive gear 
  • Replacement countershaft bearing

 

Main Drive Gear Bearing Kit Instructions

This kit provides everything you need to eliminate the all too common stock maindrive gear bearing failures. We include our exclusive BAKER double tapered roller bearing assembly, and a replacement cruise drive main drive gear.

Also available is a Transmission Rebuild Kit to go along with this double tapered roller bearing kit. P/N TRK-CD6-2

 

  • 2006 and later Stock Dyna 
  • 2007 and later Stock Softail / Touring

    TERMS 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.

    LIMITED WARRANTY POLICY

    BAKER™ transmission assemblies and transmission builder 's kits, 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, whichever occurs first. All other BAKER products 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, except for the following; Warranty does not cover clutch plate wear, throw out bearing failures or mainshaft breakage due to improper clutch nut installation.Electrical components carry a 30-day warranty; cosmetic finishes (chrome plating, hard anodizing, powder coating) are covered for 60 days. Certain promotional products may carry a shorter warranty as specified at the time of purchase. 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 purchase invoice. If after evaluation by BAKER a defect in materials and/or workmanship is found, BAKER will, at their option, repair or replace the defective part of the assembly.

    RETURNS AND EXCHANGES

    Returns are permitted within 30 days of the delivery date. 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.

    ADDITIONAL WARRANTY PROVISIONS

    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 manufacturers 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.



    Factory 6-Speed Tapered Roller Bearing Kit
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    Customer Reviews
    4.8 Based on 57 Reviews
    5 ★
    88% 
    50
    4 ★
    5% 
    3
    3 ★
    4% 
    2
    2 ★
    3% 
    2
    1 ★
    0% 
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    R
    05/06/2024
    Robert SVG verified by SHOP
    United States United States

    Only the best!

    DS
    10/23/2023
    drew s.
    United States

    Main Drive Bearing Replacement

    Fairly easy installation, more stout than OEM. Doesn't make noise anymore.

    DS
    10/23/2023
    drew s.
    United States United States

    Main Drive Bearing Replacement

    Fairly easy installation, more stout than OEM. Doesn't make noise anymore.

    AG
    08/30/2023
    Andy G.
    United States

    3,000 miles and Satisfied

    My 6 Speed blew out at 32k with a bad main bearing. Put this in and went to sturgis and back 3,000 miles later no issues. Bought this and the tranny rebuild kit and all the parts were very nice quality. Put a manual tensioner in too so Iwon’t ever have a tranny issue like this again. Garbage factory parts that shouldn’t have ever been in them. Bakers “ timken “ setup is super nice and comes with a warranty.

    A
    01/21/2023
    Anonymous
    United States

    Fit and feel

    Parts went in as designed, feels smooth and no more fluid leaking from main shaft seal. After a few thousand miles.

    Web Product ID: 9847666510
    Baker Drivetrain Team Illustration
    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 drive gear 
    • Replacement countershaft bearing

     

    Main Drive Gear Bearing Kit Instructions

    This kit provides everything you need to eliminate the all too common stock maindrive gear bearing failures. We include our exclusive BAKER double tapered roller bearing assembly, and a replacement cruise drive main drive gear.

    Also available is a Transmission Rebuild Kit to go along with this double tapered roller bearing kit. P/N TRK-CD6-2

     

    • 2006 and later Stock Dyna 
    • 2007 and later Stock Softail / Touring

      TERMS 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.

      LIMITED WARRANTY POLICY

      BAKER™ transmission assemblies and transmission builder 's kits, 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, whichever occurs first. All other BAKER products 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, except for the following; Warranty does not cover clutch plate wear, throw out bearing failures or mainshaft breakage due to improper clutch nut installation.Electrical components carry a 30-day warranty; cosmetic finishes (chrome plating, hard anodizing, powder coating) are covered for 60 days. Certain promotional products may carry a shorter warranty as specified at the time of purchase. 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 purchase invoice. If after evaluation by BAKER a defect in materials and/or workmanship is found, BAKER will, at their option, repair or replace the defective part of the assembly.

      RETURNS AND EXCHANGES

      Returns are permitted within 30 days of the delivery date. 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.

      ADDITIONAL WARRANTY PROVISIONS

      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 manufacturers 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.