Engine Compression
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#5
RE: Engine Compression
well the tool came with the adaptor for the 12mm motorcycle thread so it was likea 3" adaptor plus the almost 20" hose for the gauge itself so it may have played a factor but im thinking its just either a blown gasket or either valve guides or piston rings are leaking. As for my other post about engine troubles and smoke, i spoke to a friend who worked as a bike mechanic for a long time and he said (for future reference for anybody with smoke problems) If the bike has been sitting for a long time and it smokes when it idles or accelerates you should do this. Take it on an express way or highway to a high speed and high RPM and after a while the smoke should disappear since the temperature inside the cylinders would reach high enough that they will burn off anything that's been sitting in there for a while. If it doesnt then your piston rings are gone and need replacement. Anybody know where i could buy piston rings? I can't find them on bikebandit or service honda.
#6
RE: Engine Compression
Regarding the compression tester, there should be a 1-way valve at the engineend of the hose, so the hose length itself shouldn't make any difference to the final reading, just to the amount of time to pump up the gauge. The volume of the passage inside the adaptor will add to the static volume, so (say) a 3cc adaptor volume will reduce the compression reading by 20% so the 185psi becomes 150psi. IMHO youshould check whether you have an accurate reading before deciding whether to carry outa high-speed remedy.
Sources of piston rings: try crotchrocket.com, Ron Ayers etc.
Sources of piston rings: try crotchrocket.com, Ron Ayers etc.
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