David Houston
XS400 Member
i have trouble with low compression mine is 120psi should be about 165psi i tried a wet test with small amount of 2 stroke oil in each cylinder, refitted the spark plugs (did not fit the HT leads) the wet test brought the pressure up to 135 psi on each cylinder. stripped head off to make sure the valves and seat were ok, all valves and seats were good no leaks. measured cylinder bores 69.97mm on one clinder and 69.90mm on the other , should be 69mm.do i have to get a rebore then fit oversized rings or would fitting a new set of standard rings help.
i appeciate any recomendations.
cheers dave
i appeciate any recomendations.
cheers dave