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Cruise Drive Upgrade Bundle

This discounted bundle will help repair your stock Cruise Drive transmission.

Normally, these parts would cost:

Part Normal Retail Cost
Primary Rebuild Kit $99
Street Door $395 (Polished or Black)

Factory 6-Speed Tapered Roller Bearing Kit $599
Smooth Shift Kit $399
Total  $1492-$1522
(Depending on the finish of chosen Street Door)


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.

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 reduced by 90%. Improved transmission function is complemented with Function Formed design cues.

Increased axial loads generated by the helical gearset allow the stock door beveled snap rings to compress, allowing the door bearings to walk in performance applications. The Street Door corrects this shortcoming and is a requirement for any serious motor upgrade.

Installs with no modifications and includes ARP fasteners, mainshaft and countershaft nuts.

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

The design principles that made our Six-Speed Overdrive shift so smooth were applied to create a shift drum/pillow block kit that will bolt onto any cruise drive 6-speed and give super smooth and precise shifting. The pillow block included with the kit is machined from our 6061-T6 extrusion stock for a significant increase in strength over stock. 


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.

Harley-Davidson transmission upgrade
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Harley-Davidson transmission upgrade Cruise Drive Upgrade Bundle Cruise Drive Upgrade Bundle Cruise Drive Upgrade Bundle Cruise Drive Upgrade Bundle
Customer Reviews
4.3 Based on 3 Reviews
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Thunder A.
United States United States

this is a great product, I recommend it all the time.

United States United States
Cruise Drive Upgrade Bundle

trap door didn't fit correctly,. shifter drum did not work correctly,.installed everything and took my bike for a ride and shifted to third gear and the transmission over shifted and exploded the trans not real happy with that,.. been a motorcycle mechanic for over 35 plus years,,.. its possible I did something wrong or I just got a bad set up its fixed now with stock Harley parts and works as it should here again this may not be all bakers fault but I feel some blame is on them,.. They do have assume products mine just wasn't one of them

United States
2011 Flhx with crazy power

This is kit is amazing and so easy to install, only down side was the main shaft in the transmission was bad too. So we went with a Grudge Box to solve that.

Web Product ID: 1323375427662
Baker Drivetrain Team Illustration