Alright so my 06 yz250f was starting great yesterday and all last month. First kick no problem. But now today if i give it a few kicks at tdc it'll fire for a split second then die. If i keep kicking it'll eventually start. The left an right intake valves measured to .003 and .0025 but i cant get to the middle ine with my fat feeler gauges. Is the tight valves the problem?