Universal Parts Top End Gasket Set for 49cc or 50cc 4-stroke horizontal cylinder, fits and compatible with Honda style engines. **Note: The engine type is commonly found on ATVs, Dirt Bikes, Super Pocket Bikes, Small Dune Buggies and much more. Universal Parts Top End Gasket Set for 49cc or 50cc 4-stroke horizontal cylinder, fits and compatible with Honda style engines. **Note: The engine type is commonly found on ATVs, Dirt Bikes, Super Pocket Bikes, Small Dune Buggies and much more.