57.4mm Bore Cylinder Kit with Piston for 4 Stroke GY6 150cc ATV 157QMJ Engine

$59.99

Inner diameter of cylinder:57.4mm/22.6″,hole spacing:54mm/2.12″,outer diameter of piston pin:15mm/5.9″(as the picture shows)
Replacement for 4 stroke gy6 150cc 152qmi 157qmj engine,157qmj engines with the egr head,76mm bolt pattern 2 1/2″ tall head.
Made of high-strength material,fast heat dissipation,anti-wear,long-term high-load operation is not easy to deform,high-temperature and high-pressure resistance,reduce friction loss,effectively reduce the risk of oil burning.
Precision machining of the cylinder wall and piston clearance,reduce gas leakage speed faster,optimize the combustion chamber design,reduce fuel consumption.