xs400 1mm oversized piston rings

David Houston

XS400 Member
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hi there
hopefully someone can help me out , i have a 1979 xs400 it has been rebored and i require 1mm oversized piston rings. i cant seem to find them anywhere. does anyone now where i can get 2 sets.
appreciate any help.
cheers dave
 
Hi tyler
I have checked it many times know, it is reading 70mm all over the cylinders . The piston ring gap when in the cylinders is over the max recommended. The pistons and cylinders are all in good condition. When i did a compression test i got 120psi on a dry test and 145psi on a wet test before i stripped the engine. Valves and gaskets all good absolutly no leaks .
There are no I/D marks on the pistons. Which i found strange but they are just under the 70mm.
Cheers dave
 
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