100cc Big Bore Performance Kit

for

GY6 50cc 139QMB Chinese Scooter with 64mm valve

CONDITION: BRAND NEW

This kit comes with:

• 1 - Head, (64mm valves)
• 1 - Cylinder (50mm ID)
• 1 - Piston
• 1 - Wrist Pin (13mm OD)
• 1 - Complete Gasket set
• 6 - Rollers (18mmx13mm 8.5g)
• 1 - Complete Ring Set

Direct  Fit for 139QMB / QMB139   GY6 Engines with 64mm Valves.  Their are many variants of the  139QMB engine. We cannot guarantee  direct fit or any fit at all  on these variant engines either  with, or without machining. Please check with local dealer if you are not sure!