Trail Boss 250

bigdblaster

New Member
Feb 17, 2008
931
3
0
Kittanning.Pa
the neighbor kid has one and it will start sometimes when its cold and runs fine..but when its warm and u shut it off it wont start again..his dad compression tested it and said it was almost 100psi i didnt get exact number from him sounds low to me..so i checked spark and fuel its getting both obv..if it starts when its cold..so i couldnt get it to start..so i took the head and jug off and there is one little score in the piston u can feel with your fingure nail and there is black smudges of the piston walls looks like blow by..so what u guys think time for a new piston kit or what this is my guess and wtf were they thinkin when they built this machine..so hard to get bolts out..open for some help if anyone got any idea's