Honda Spree and Elite 50 Forums

this is a variation on a question I posted a while back. I just installed a big bore kit and get a compression reading of 75 psi. Not nearly enough for combustion. I'm told the rings do not have to be run in to be seated and that the compression should be about 125 psi when first installed. I am fur...

My first post because I'm baffled. New rings with piston diameters within service tolerances. I can only get about 40 psi compression. Piston and new rings are very snug in the bore. I've been told to check crank seals, oil pump, and crankcase for leaks. I'm baffled because that last inch of piston ...