May 5, 201313 yr finally got round to pulling my barrel off last week after listen to my piston slap for a few weeks knock knock who is there piston slap so was lucky that it haven't picked up in the barrel a de glaze and she was good as new so my bike had a b piston in beta dose 4 pistons abcd thay do say put the next size up that will mean ill put a c in it then i was told different go up two from standard as the c wont take long before ill have the same problem with the piston slap so ended up buying the d size piston kit small end bearing and base gasket and head gasket the base now the old base gasket was around 3 mm thick and the new was 1 m ish has it come from factory with 3mm one or has some one changed it to bring the compretion down its all back together now and running fine nice to hear it all nice and crisp again
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