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+--- Thread: cylinder 3 much lower compression (/showthread.php?tid=83236)
cylinder 3 much lower compression - Dean - 23-06-23
why does the 3rd cylinder show low compression (70 psi) and the others are good (200-210 psi) on 2 different mk1 600 fzs engines all are cold readings as engines are not in bikes
Re: cylinder 3 much lower compression - BBROWN1664 - 24-06-23
put a bit of oil in the cylinder to see if its a sticky/knackered ring.
Could be dirt/crap stopping one of the valves sealing properly too.
Re: cylinder 3 much lower compression - Gnasher - 24-06-23
It could also be you've got a valve/s not fully seating.
Re: cylinder 3 much lower compression - basher - 02-07-23
for me its cylinder 4 is really low, I suspect rings are worn but I wont bother replacing the pistons until winter