5th. Overdrive Gear for Yamaha XS650 (1978-84). Heiden Tuning original

design and source. Makes 5th. Gear taller ( higher top speed in 5th. but less torque and vibration ).

24 Tooth 5th. Pinion Gear. Replaces 23T 5th.Pinion Gear, lower 4 gears

remain the same. Fits: 78-84 only ! Note : Yamaha changed the shape of the transmission teeth in 77 and this is indicated by a line on the crest of each gear tooth. This is a “Race” part and carries no warranty other than

for defects in material. Engine needs to be opened to install.


Part #05-0870 $44.95 Ea.