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 your engine.  Please look at pictures and specs before ordering.

TIMING chain adjuster details:

• Overall length of cast body: 39.3mm (1.54 in)
• Overall width of cast body: 51.6mm (2.03 in)
• Hole distance: 40mm (1.57 in) center-to-center apart
• Shaft diameter: 7mm (0.27 in)
• Shaft is serrated on one side and catches small pawl at base
• Fits both short case and long case GY6 50cc scooters

• Known to fit Tao Tao Blade 50, Classic 50, Cruiser 50, EVO 50, Jet 50, Magic 50, Milano 50, New Racer 50, New Speedy 50, Pony 50, Speedy 50, Thunder 50, Venus 50, VIP 50 and Zummer 50.  

  Shipping details:

  Do you need your timing chain tensioner fast?  If you order before 3:00 pm CST, Monday thru Friday, your order goes out the same day.   Buy now!