So I got an 04 YZ 125 a month or two back. I have mainly been setting up the suspension since the engine seemed strong. Raced in a Grand Prix last weekend and the suspension tore me a new one! Gold Vales on the way. Anyway I put some new tires on, chain, sprockets and it is coming together nicely. I planned on putting in a new top end soon but I was going to wait til after the next race next weekend. I was putting in a new plug and decided to check the compression. 75psi! I couldn't believe it. Needless to say I immediately tore the top end off and ordered a new piston kit. Powervalve had a lot of oil in it but everything looked great. It felt so strong I can only imagine how the Wiseco will feel. I THINK the head torques 20lbs and the cylinder 22lbs. My question is how are you supposed to torque the cylinder bolts? 2 of them are no problem but the other 2 I can only get a box end over. I plan on torquing those 2 by feel unless someone has a solution. I am really loving this bike and once the forks get sorted out I will be relieved.