Upgrade your transmission for smoother, more positive shifting and improved torque handling ⚙️.
This complete kit includes a trap door, 6-speed gear set, 28-tooth motor sprocket, longer primary chain, adjusting shoe, fixed spindle-shift drum and anti-overshift ratchet shift pawl assembly.
The bearing door is machined from billet 6061-T6 aluminum and uses wider bearings with retainer plates for increased durability and serviceability.
Gears are manufactured from 8620 steel, cut prior to heat treat and precision ground with diamond-coated tooling for quieter operation; fourth through sixth gears are helical for silent engagement.
Designed to install into existing 5-speed cases to lower cruising rpm, the kit ships with easy-to-follow instructions and is made in the USA 🇺🇸.