Model compatibility ensures fit for GY6 49cc 50cc engines commonly found in 139QMA and 139QMB mopeds and small engine applications
construction designed to withstand consistent use in ATVs and go-karts requiring a 155mm clutch output drive shaft
engineered component supports smooth power transmission and clutch engagement in 4-stroke engine systems
Direct replacement part ideal for maintaining or upgrading the drivetrain in various small displacement vehicles and recreational machines
Suitable for a wide range of applications including commuter youth ATVs and DIY go-kart builds with GY6-style engine platforms
Description
Gearbox input shaft for 50cc with 139QMA and 139QMB engines.This is where the clutch mounts.Thread size is M10x1.25, with 22 splines and a 16-tooth gear.Overall length measures 155mm.Compatible with various scooter, moped, ATV, and go-kart models using the specified engine types.