This listing is for a genuine OEM FCR 38 Keihin carburetor for 2004-2010 Kawasaki KX250F and 2004-2009 RMZ250 off-road motocross motorcycles and might fit many other stock and custom fit applications. The carburetor is specifically designed for 4-stroke engines and has a mechanical choke type. The manufacturer part number is 15004-0056 and it is a type of carburetor that is commonly used for air intake and fuel delivery in motorcycles. If you're looking to improve the performance of your Kawasaki or Suzuki dirt bike, this carburetor is an excellent choice. Buyer must assure fitment before purchase. But if you are looking at this listing, you probably already know what it fits and how to installed and set up. Includes aftermarket billet anodized fuel adjuster knob Comes with TPS (Throttle Position Sensor) You must use your hot start mechanism from your bike or obtain one. You might have to jet it for your conditions and elevation but worked on the 2009 KX250 that it was pulled from.