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25th November 2016 at 5:32 pm
#13855
Michael
Participant
This is how the piston surface should look / feel like:
right hand side is a stock piston (78mm), left hand side is a big bore piston (86mm).
If it has a “burn-in”-hole, it should still move up and down, but may end up like the poor one.
All the best !
Cheers, Michael