Chainsaw Repair

Adam, my first pistons I made were out of 4032 , I found i had no problems of any kind until I tried to really high rpm the big bores , the 60 mm piston worked perfect and I still have that piston here . I put it in a real used 3120 and put it to work cutting big firewood and ran it for a solid week then took it out to see how it looked , I figured if the thing blew up I was not out alot of money . If you phone Wiseco and need just 1 or 2 pistons of a bore they donot do they use 4032 or a different number alum. but I cannot remember it now  maybe 4031 something like that. I seen the alum. sitting on the floor last time I went threw the piston plant . There are other guys making pistons and I have tried them but they may work great in a snowmobile engine but broke all to hell in a nitro motor , When you got chainoil all over your boots and the piston pin goes out the pipe its not a good day