On my brothers 95yz80 the dowles on the crankcase that align the cylinder are corroded(sp?) and now after trying to remove them all messed up. Any good ideas on how to remove a stuck dowel? I tryed removing the entire stud but the 2 nuts i put on there keep spinning. Should i hold the top nut while turning the bottom? Could i just grip the stud its self w/ vise grips and turn it? It isnt a lefty thread is it? I have penetrating oil on it now although i doubt it will help. Also where can i get new dowles? Would sears have any? Or are they specific?