Chinese Timing Cam Chain Adjuster / Tensioner
GY6 139QMB 50cc engines
This is a timing chain tensioner for GY6 139QMB 50cc engines. If you are needing a drive chain adjuster this is not the one you are looking for. This chain is a much smaller chain and is located inside you engine. Please use specs & pictures to match your chain.
TIMING chain adjuster details:
- Overall length of cast body: 39.3mm [1.54"]
- Overall width of cast body: 51.6mm [2.03"]
- Hole distance: 40mm [1.57"] center-to-center apart
- Shaft diameter: 7mm [.27"]
- Shaft is serrated on one side and catches small pawl at base
Known to fit Taotao Cruiser 50, EVO 50, Magic 50, Milano 50, New Racer 50, New Speedy 50, Speedy 50, Thunder 50, Venus 50, VIP 50 and Zummer 50.