This is a brand new Keihin PWK 28 big carburetor kit specially manufactured by Kitaco co. It is designed for Honda CRF50F and XR50. Please refer to your own specific vehicle and engine for compatibility. Brand new in box. PWK? 28 CARBURETOR FOR HIGH TUNED ENGINE. 28 BIG FLAT VALVE MAKES SHART ACCELERATION? MANIFOLD IN THE KIT IS BIG PORT JUST TO FIT CARBURETOR FOR BIGGER INTAKE. 24? LEFT SIDE? M/J#135? P/J#38? ASSEMBLED? IT IS FOR? 22.2 HANDLE BAR. STOCK HANDLE BAR NOT USABLE. ? 22.2 HANDLE BAR, R LEVER & HOLDER SET, FRONT FORK KIT REQUIRED. STOCK AIR CLEANER NOT USABLE.