ATGT-12Z GY6 49cc 50cc to 100cc Scooter Engine 50mm Cylinder Head Assy with Valves Set for 139QMB 139QMA Chinese Moped ATV Go Kart Quad (Non EGR Type, 69mm Valves)

This head had some negative reviews. I disassembled the head after receiving it relapsed in the valves and lubricated the valve stems and reassembled did a check on each port to make sure there were no leaks, and everything was perfect. After installing the head compression went from 75 psi to 180 and the scooter started right back up.

The best

I liked it fit perfect, done its job making my scooter faster

Better the 2nd time thank you

Lightning fast delivery!!!

Bought a used mad dog with stripped exhuast threads/studs. Exact match replacement to the stock 69 that where on it..

Exactly what it said it was , it's working great I recommend this product.thanks

all went together well until i started to adjust the vealves and the adjusters were too short had to take it back off and just eat the cost,,,,,,never buying from them again cuz it says it fits gy6 49cc and it does not

Boîte détruit manque tout les visse et les gasket !!