Two-stroke gasoline engines

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type of check valve

Polini S.p.A. is an Italian manufacturer of tuning parts for motorcycles, mopeds, and scooters founded in 1945. Among other products, they produce cylinders and variators for both racing and road use. They also produce pocket bikes with 50cc up to 15 hp.

Malossi S.p.A. is an Italian manufacturer of tuning parts for mopeds and scooters. It was founded by Armando Malossi in 1930.

in motorcycle manufacturing, a combined engine and gearbox

Suzuki FB/FE/L50/LJ50/T5A/T5B family of engines