Looking for the specs on float adjustment. I am rebuilding my carburetor on my 1999 Sportsman 500 due to gas leaking out of the overflow tube when sitting and / or when riding. I just want to check my float adjust before reassembly. Anyone have the information or know where I can find it. Thanks
Set the carb with the intake on the bench. That way the float rests on the needle without exerting pressure on it. Bowl mating surface to top of float should be 13mm +-1mm on a Mikuni BST34 which is the standard carb on 500's.
It's 14.7mm+-1mm on the BST40 which is standard on 500HO's. The 34 and 40 refer to the inner diameter of the engine side of the carb in mm's.
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