Baker Direct Drive 7-Speed
The Baker Direct Drive 7-speed (DD7) was engineered to make full use of the torque and power output of the Twin Cam and M-8 motors via precise gear ratio management, delivering "smooth, crisp shifting, continuously pulling acceleration and strong take-offs from stoplights."
The DD7 upgrades any existing 2006-later Big Twin 6-speed to a full 7-speed transmission.
Bert Baker says that "the Baker 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. We did not make this transmission a deep overdrive, rather we shortened 1st gear and tightened up the gears to deliver the riding experience that riders were after when they bought their bike.
"The gear ratios leave 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 5-7. No big drops in rpm from one gear to the next or lugging the motorcycle off of a stop light, just smooth, uninhibited acceleration.
"We did not stop at just fixing the gear ratios. We improved the smoothness and crispness of the shifting by reducing the main shaft 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. We 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.
"We have 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 our unit is a drastic improvement over stock. By utilizing fully diamond ground, helical gears in 1st and 4th-7th, we are able to deliver a much quieter riding experience. 2nd and 3rd gears are diamond ground, with spur gears to handle the peak torque that is reached in that range."
The DD7 includes a Baker shifter pawl, new main drive gear bearing and seal, door, top and side cover gaskets and is compatible will all types of aftermarket hydraulic side covers, as well as the stock Screamin' Eagle versions.
This is a direct slide-in installation with no case modifications needed, that clears all exhausts and works with all aftermarket clutches. Backed by a five-year limited warranty, it is available for 2007-later Softail, 2007-later Touring FL, FLT, FLH and 2006-later Dyna.
BAKER DRIVETRAIN
