5th. Overdrive Gear for Yamaha XS650(73-84), Main shaft 0.979mm ONLY

5th. Overdrive Gear for Yamaha XS650(73-84), Main shaft 0.979 mm ONLY 0.984 inches or 25 mm (Hole diameter)24 Tooth 5th. Pinion Gear. Replaces 23T 5th.Pinion GearGear fits to stock location and makes fifth gear taller (higher top speed in fifth but less torque and less vibration) but ratios in lower gears remains the same so that acceleration & torque in lower 4 gears remains the same. Cases must be split to install. This is a "Race" part and carries no warranty other than for defects in materials.Note: The gear I.D. measures 0.984 inches or 25 mm, PLEASE MEASURE IT BEFORE ORDERINGThis is Highly recommended to be used with part #05-0857.