Re: Fireblade 954 compression problem
I'd gut and spark plug, solder a copper tube down into the body of the plug. I have the copper tube cut high enough to clear plug entry. I place a plastic hose over the copper tube and blow in it. The hose is so long I can walk to the back of the bike for the muffler. Or hose long enough to go to the front of the head.
A. Intake valve: With throttle body off, blowing into the clear tube, I can hear air coming out of the intake port.
B. Exhaust valve: With muffler off, this port will send air out I can hear.
C. Rings: The fattest hose off the air box is the crankcase breather tube. I can hear air come up this tube off the engine.
D. Head gasket: Sometimes ticks out the front or back would be X. My Y axis would now be from cylinder to cylinder is a burnt ring gasket. Sometimes burns to the next cylinder over and both lose compression... as one is on compression, but the other cylinder is on its intake or exhaust [open] stroke and which side it burned on meaning.
Pampers is the priority not the parts:
Can of copper coat for the used head gasket.
Reuse top rubber gasket and hope it seals.