OEM Honda CBR250R / CBR300R Cylinder Base Gasket

Restore reliable sealing and prevent oil or coolant leaks with this authentic Honda Cylinder Base Gasket. This precision-engineered gasket sits between the cylinder and crankcase on your single-cylinder engine, ensuring a perfect seal under the high temperatures and pressures of everyday riding.

Designed specifically for the popular Honda 250/300cc liquid-cooled single-cylinder platform, this OEM gasket delivers factory-level fit, form, and function. It is a direct replacement for the original part (supersedes older part number 12191-KYJ-900 in many applications).

Fitment (Direct OEM Replacement):

• CBR250R (2011–2013 models)
• CBR300R (2014–2022+ models)
• Also fits related models including CB300F, CMX300 Rebel, CRF300L / CRF300R Rally (verify exact year via your VIN or parts fiche)