Designed to work with only the 2 stroke Bullet Train engine kit, this crankshaft oil seal keeps your engine oil within the crankcase of your engine and protects its internal parts from dirt and dust. This seal only works on the BT80 or bullet train kit.

 

This 66/80cc Crankshaft Oil Seal is designed for use with Electric Start 2-stroke bicycle engine kits, like the 66/80cc Flying Horse Bullet Train Bicycle Engine Kit

Note: This part is not compatible with standard 66/80cc 2-stroke engine kits, such as the Mega Motors engine, non-electric start Flying Horse engines, Grubee engines, RAW Motors engines, and Power King (PK80) engines