I recently bought a 05 wr450. I always go over everything before trusting a bike out on long runs. Upon checking valve clearances one intake valve has little or no clearance. It already has the thinnest shim available. So I pull the head it is seated and sealed. Why would it have such little clearance if any and what will that effect. Bike seemed to run okay otherwise but only did short test drive going thru the gears and listening.