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Baker Drivetrain 6 Speed Direct Drive Gear Set For Harley Big Twin

The Baker DD6 6 Speed Gear Set will drop into your factory transmission housing providing you with a crucial 6th gear that reduces engine speed by 500 RPMs at 80MPH. Reduce vibrations, save fuel and take comfort knowing that your motor is happy to run at highway speeds. If you are looking to maximize efficiency on long trips a Direct Drive Gear Set is the right choice for your bike. 

The DD6 provides more than just economical highway cruising. All gearsets are made out of 8620 steel that is cut before heat treating then precision ground creating a gearset rated to 120ft/lbs of continuous torque! 1st through 3rd gears are straight cut (spur) for strength during maximum acceleration with no parasitic axial thrust. 4th and 5th gears are automotive style helical gears for quiet and smooth operation at highway speed, while 6th gear is direct drive, meaning there is no underdrive or overdrive in top gear which translates into 99% efficiency for minimum parasitic loss, minimum wear and tear, and maximum fuel efficiency.

Features:

  • Provides 500RPM reduction at 80MPH for economical cruising and smoother operation
  • 6 speed gearset fits into stock and most aftermarket transmission housings
  • Full width Baker ground gears for strength, 4th-6th gear are helical for quiet operation
  • 28 tooth compensator sprocket, supplied with kit or assembly, also gives 14% more starter torque
  • Bearing door is manufactured from 6061-T6 Aluminum and features wider bearings and a bearing retainer plates instead of the stock style snap rings
  • Gear ratio of 3.24:1 1st gear and .86:1 6th gear
  • Redundant Neutral Smooth Shift System

Includes:

  • 28T forged sprocket
  • Double row Regina primary chain
  • 6061 billet trap door
  • Beefy 1/8″ thick bearing retainer plate
  • All gears
  • Mainshaft and countershaft
  • Longer primary chain
  • Adjusting shoe
  • Shifter drum and detent components
  • All bearings, snap rings, gaskets and hardware

Notes:

  • Minor case modification may be required due to casting variations
  • No exhaust clearance issues due to door width and profile (unlike OD6)

Made in the USA
Product Style RevZilla Item # Store Sku MFR. Product # Availability
Product Style Black RevZilla Item #10369965 Store Sku MFR. Product #DD6-411S-03 AvailabilityOnly 3 Left: Ships within 24 hours
Product Style Polished RevZilla Item #10209272 Store Sku MFR. Product #DD6-411S-02 AvailabilityIn Stock: Ships within 24 hours

This product DOES NOT FIT your 2021 Polaris General 4 1000 EPS DLX

Fitment Notes & Exceptions

DD6 (Direct Drive) vs OD6 (Overdrive)

  • DD6 is meant for touring bikes up to 120ft/lbs and offers smoother shifting due to a shallower 1 degree undercut on the clutch dog teeth
  • OD6 is meant for performance and race applications up to 165ft/lbs due in part to a more aggressive 4 degree undercut on the clutch dog teeth
  • Both Gear Sets reduce engine speed by 500 RPM at 80MPH
  • DD6 achieves an overdrive effect on the highway by overdriving the primary with a 28 tooth motor sprocket 
  • OD6 has an overdrive (.86:1) 6th gear that can be used with any sprocket for increased gearing options

Transmission Gear Ratios

  • 1st Gear 3.77
  • 2nd Gear 2.56
  • 3rd Gear 1.87
  • 4th Gear 1.44
  • 5th Gear 1.15
  • 6th Gear 1.00

Effective Gear Ratios With Included 28T Sprocket

  • 1st Gear 3.24
  • 2nd Gear 2.20
  • 3rd Gear 1.61
  • 4th Gear 1.24
  • 5th Gear .99
  • 6th Gear .86
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