this is going to be soooo helpfull tomorrow. this is the last time you guys get to say good bye to my smog pump and carcoal canister. it will be gone. and im doing daves mod to my carb too. it better be a diff bike. anyways on my research this is a great write up that i have found. im sure that its been posted on here before. but it always has a place for a new post. http://www.4strokes.com/tech/honda/xrlsmog/ also here is daves mod.... http://www.4strokes.com/tech/honda/xr650lcarbmods/ enjoy both write ups. both great info... thanks dave, brian, and gary! both write ups make it easy to decide on if we should or can do this ourself.