Guess your buddy got lucky, here’s some more of their handy work .... plating peeled an saw hung a ring . Proof is in the pictures listed below. Aparently from reading else where MONSTER WORK SAWS is notorious for failures like this . Plating peeling almost like they are not properly chamfering the exhaust ports correctly? Entire top end was destroyed ! If you look closely at one picture of intake side of piston it appears their was also something going on around intake port as noted by the uniform pattern on the skirt ! What they did to cause this to happen is beyond me! If anyone has any ideas please let me know. All in all the owner believes the saw has no more then 50 hours on this 390xp since it was bought about three months ago. He is a professional logger with a fleet of saws but was using this as his main felling saw. He is now wishing he spent his money with a more reputable builder where shotty work like this could have been avoided.
