41mm fit on 300cc to 650cc engine. Please make sure your model will fit in this listing and compare with pictures provided here before purchasing! Replacing the carburetor requires experience and technology.The condition of each engine is different. The area is different (altitude and climate), even the oil is different. The nuances should be finely adjusted. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle & Scooter Parts & Accessories\Air Intake & Fuel Delivery\Carburetors". The seller is "ywzs-moto" and is located in this country: CN. This item can be shipped worldwide.