Zenoah G320RC 4-Bolt Top End Kit 38mm 31.8cc (ESP Race Ported - Stock Stroke)

Zenoah G320RC 4-Bolt Top End Kit 38mm 31.8cc 967319401 -  (ESP Race Ported)

Race ported by ESP (Earth Surfer Products) for extra power. This is the stock G320RC top end, for use with the stock (28mm) crankshaft.

Zenoah Part # 967319401 with ESP Race Porting Done to Cylinder