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team-red-rider
04-18-2007, 08:10 PM
hey guys on my 125 i was riding it then it died...ok i poped the head off the exhaust side of the piston is F'ed up its melted and the rings are bent (no scratches on the cyl suprisingly!) what would cause that? i had it mixed at 15:1 while i was running it After new crank seals! and is Wiseco or OEM betteR?
RedRider_AK
04-18-2007, 08:26 PM
What sort of 125 is this?
team-red-rider
04-18-2007, 08:30 PM
Yamaha Tri-Moto 125
RedRider_AK
04-18-2007, 08:56 PM
Which is a... two-stroke?
team-red-rider
04-18-2007, 09:42 PM
yea a 2 stroke lol
RedRider_AK
04-18-2007, 09:44 PM
Might be overheating... Check if theres blowby on the piston skirts...
team-red-rider
04-18-2007, 09:48 PM
nope the piston looks P-E-R-F-E-E-C-T except right by the exhaust
RedRider_AK
04-19-2007, 02:04 AM
Maybe you had a lot of real bad preignition or detonation (you'd hear it, though). I have nothing to say really. Was the piston original stock?

As for pistons, Wiseco is way better than OEM and it costs just the same or a little more.