Posts Tagged ‘case matching’

I first built this Polini bottom end 2 years ago. It was clean, but the case matching left room for improvement. Here’s the original case match. That will not stand, man. The top ports especially. Here’s an ok photo of comparing a before and after. The right channel is mostly done, and the left is […]

in the transition to a new, much more amazing, frame for the derbi, it was time to case match and do some porting.  i didn’t feel like splitting the cases and doing a full rebuild.  to avoid aluminum shavings all up in my crank and bearings i used some play dough and plastic wrap.  obvserve… step […]