Complete Andrews gear sets for 5-speed Big Twin models. Machined lead-in ramps for quick, positive shifting plus reduced wear on drive dogs and slots. Shot-peened, heattreated, high-nickel alloy gears, with aircraft-quality, heat-treated, high-nickel.
steel counter and mainshafts.
Closes the gaps for close-ratio first-to-second shifting, and about 5 mph more first gear speed.