After my rebuild everything was going well. I was using the old top end DR 130 on my small frame. 25mm carb, leo vince with primavera primaries and 4 speeds.
I was on the highway after some city riding with out a hitch or problem. Then the next day I was on the highway for ten minutes and it seized. The plug was fine, everything torqued to spec, mixture was good. Main jet of 90 on the dellorto phbl 25mm.
After some pics, consultation with a friend the cause was an air leak on the intake side of the head cylinder causing blow by on the exhaust port side. I need a new top end.
After I install my Polini 135cc kit how would you recommend breaking it in or any other advice you have.
Thanks.