Fit into existing 5-speed cases; lower the rpm at cruising speedsInclude a 6-speed gear set (3.24:1 1st gear/.86:1 6th gear), 28-tooth motor
sprocket, longer primary chain, fixed spindle-shift drum and anti-overshift ratchet shift pawl assemblyAll gears are full-width Baker ground gears;
4th, 5th and 6th gears are helical for silent operationInclude easy-to-follow instructionsReplacement primary shoe available separately; designed for
use with tensioner bracket OEM #39990-01Made in the U.S.A.