Motorcycle Engine Seal For Yamaha XT250 Serow 250 XG250 Tricker YBR250 2008-2024 Work for Fit For Yamaha XT250 XG250 YBR250 enduro street bike cylinder head sealing assembly Matched bolt holes outline support direct bolt-on installation without or extra Blocks combustion leakage separates coolant to maintain steady power output on rugged trails Multi-layer compression composite material with smooth cut edges OEM consistent thickness assembly gaps for reliable long-term sealing under temperature operation