BAKER Drivetrain DD7 Direct Drive Seven Speed Left Side Drive Complete Transmission for 2006-2016 Twin Cam Softail, Dyna, & Touring Big Twin Motorcycles

This BAKER DD7 is a complete transmission, case and all.

The DD7 upgrades any existing 2006-2016 big twin 6-speed to a full 7-speed transmission. The DD7 is more than just another gear added to the mix for the sake of one-upmanship. That 7th gear enables the motorcycle to now make full use, by way of gear ratio management, of the torque and power put out by the new 96 CI and 110 CI motors rolling off the assembly line in Milwaukee. BAKER did not make this transmission a deep overdrive, rather BAKER shortened 1st gear and tightened up the gears to deliver the riding experience that you were after when you bought your bike. The gear ratios leave you the rider with the experience of smooth, crisp, continuously pulling acceleration from 1st all the way through 4th gear. Then you are able to start getting into the cruising portion of the program in gears 5th-7th. No big drops in RPM from one gear to the next or lugging the motorcycle off of a stop light, just smooth, uninhibited acceleration.

BAKER did not stop at just fixing the gear ratios. BAKER improved the smoothness and crispness of the shifting by reducing the mainshaft mass by only having 1st gear be a part of the shaft, rather than 1st-4th gears like on the stock unit. Reduction in rotating mass for shift quality is a fact that has been utilized in the automotive world for years. BAKER ditched the stock detent arm and spring assembly from the door in favor of a Linear Detent that decreased friction while increasing smoothness when coupled with the all new shift drum design. BAKER tightened up the dog teeth on the gears to prevent the loud clacking noise that accompanies every shift on the factory 6-speed. Through the use of a billet bearing door, 28% wider bearings in the door, steel bearing retainer plates and full width gears, the durability and strength of the unit is a drastic improvement. By utilizing fully diamond ground, helical gears in 1st & 4th-7th, BAKER is able to deliver a much quieter riding experience. While 2nd and 3rd gears are diamond ground, spur gears to handle the peak torque that is reached in that range.
  • Fits 2006-2016 Twin Cam Softail, 2006-2016 Twin Cam Dyna, and 2007-2016 Twin Cam Touring.

  • The transmission case is finished in wrinkle black.

  • Features include a shorter first gear ratio (numerically higher) to help with the off-the-light get-up-and-go, as well as slow speed maneuvering around the bar parking lot. The DD7 has a fully assembled gear set and shift system so that no adjustments are needed for installation. The DD7 includes a BAKER shifter pawl, new main drive gear bearing and seal, door, top, and side cover gaskets. The DD7 is compatible with all types of aftermarket hydraulic side covers, as well as the stock Screaming Eagle versions. Installation is direct slide-in; no case modifications are needed; clears all exhaust and works with all aftermarkets clutches. The DD7 includes BAKER Direct Drive 7-Speed Stock Side Cover emblem.

  • Benefits include making full use of the late-model torque and power output, experiencing smooth, crisp, continuously pulling acceleration, no big drops in RPM from one gear to the next, no lugging the motorcycle off of a stop light, easy to find neutral every time, smooth shifting without the stock clunks or ‘jerks’ when engaging, stronger torque capacity, and quieter.

  • Backed by a 5 year manufacturer's limited warranty from BAKER Drivetrain.
25 Tooth Drive Sprocket: Conversion of the stock belt drive to 530 Chain is the tried and true solution to address broken belts in performance applications. 2009-later requires retrofit to earlier non cush-drive rear wheel, or aftermarket wheel, to make wheel sprocket installation possible (PN 25T02-07).

Cruise Drive Pulleys: Along with the launch of the Cruise Drive transmission on the 2006 Dyna models, the factory started using bigger diameter splines on the output gear. This change required us to tool up 2 new pulleys to meet the tuning needs of our performance minded customers. Pulleys are available in 31 and 30 tooth configurations. *Note* 30 tooth pulleys require the use of the 139 tooth international belt available through any major aftermarket distributor (PN 30T-07 for 30 tooth, PN 31T-07 for 31 tooth).

Recommended Upgrades: Spectro Heavy Duty Primary Oil (Add $13); Spectro 75W140 Platinum Gear Lube 32oz (Add $20); Primary Rebuild Kit for 2007-up FL or Softail (Add $99).


BAKER Builder's Kits come fully assembled
and ready to install into your existing
transmission case with no modifications,
shimming, or adjustments required.