Hello folks,
Borrowed a compression tester from local mechanic and did compression test on a new to me '90 w/ 60k miles. P/O had petcock gas leak and fired up the bike with a loud backfire through exhaust. Bought the bike figuring worse case I'd part it out, but would be a shame to break up this bike as cosmetically it's in really good condition.
Did the hydro-lock test and cylinder measurements are good. P/O claimed that cylinder 3 and 4 were not holding pressure with compression test, but I did it myself, and the compression held for all 4 cylinders.
The readings are:
Dry Wet
#1 180 185
#2 190 205
#3 170 175
#4 160 165
Are these acceptable readings, or should I be concerned that there is something major going on. I'm willing to take the cylinder head off and take a look at valves and head gasket. Everything looks good under the valve cover, I adjusted the valves, and valve clearances were not too far off to start. Fired her up and white oily smoke was coming from exhaust. Took for a short ride (2 miles), swapping my '98 tank for the ride. Ran pretty crappy under 3000 rpm, but over that it was a rocket. White smoke disappeared after the ride.
Any help would be appreciated.
Thanks , Drew