Okay here I am on a beautiful day"attempting to adjust my valves. This is the first time I have done so on this machine. Obviously the idiot before me rounded out some of the Allen Hex key bolts for the timing chain cover and crank case cover. Does anybody know what size bolts these are and if they are metric threaded? I would like to go to a regular metric bolt instead of Allen. Thanks 2000 Yamaha Warrior.