56mm Head Gasket Fit For YX 140cc Pit Dirt Bike ATV Quad Motorcycle Engine Parts Fit For YX 140cc Pit Dirt Bike ATV Quad composite material withstands engine temperature to combustion leakage 56mm inner diameter cylinder bore for uniform compression chamber sealing Accurate pre-cut holes align Fit For bolt passages coolant oil channels for error free assembly Anti-deformation structure maintains stable thickness under long rev off road riding conditions Direct replacement for head gasket no or needed during engine overhaul