This air filter fits the Mikuni VM26 carbs that is commonly used with the KLX DRZ CRF 110 big bore kits. The inside diameter of the filter for where it slides onto the carb is 42MM. It may fit other carbs also but please measure carefully before buying. New clamp included. These are a very nice quality foam filter to help with keeping your engine running smooth. We also have a filter listed for the stock carb if you are using a stock carb.