Ok. Just got done a tear down of the 064 and 046. *let it be known that I find a great deal of humor in the fact that between Rob and I we have a total of 5 saws and none of them run correctly at this time, 064, 046, 034, 026 and the ms200* Got into the 046 first, it has scoring on the exhaust side of the piston but the cylinder wall towards the rear is nice and shiny with the crosshatch still in tact. Seeing as the rings appear to be friction welded into the groove I'm going to say that piston and jug are both toast. He's probably going to order another big bore kit from baileys but that will depend on feedback from the forum on what to do with that saw. Mine came next only because I wasn't sure I wanted to know how bad my saw was and how much Rob had cost me. I pulled the clutch drum first and find a clip that is supposed to hold one of the 3 clutch plates in place has broken. I can't spin the thing the clutch plates ride on off because I dont have a piston stop and refuse to half a-- it. I pull off 2 springs and remove that clutch plate and find that the back side of the clip has flung out and rolled around for a while while cutting the heck out of my oil pump and hard plastic oil line. It looks like I'm only going to have to replace the plastic oil line at this time and the clip that holds the clutch together. While I'm at it I'm going to check out and clean the fuel system and intake so I can solve the random stalling issue at idle. I can tell I need to order some tools so I can service all the saws I have laying around. BUT The big accomplishment is that my saw isn't too bad at all compared to Rob's. I hope he learns from this. THANK YOU ALL who have added your valuable information. It has been a great help. Next up after these 2 are back together is to figure out why the clutch band on the 026 keeps popping off and what I need to do to get the 200 running right. Where is the best source for tools to work on these saws? And what should we do for a new piston and jug on the 046?