I have searched and found a few links to this specific issue I have done most of the suggestions but I am still finding a very bad low compression.
Piston 2nd Oversize still running in on first tank of Gas about 40km
New Exhaust about 200km
Current compression 600kPA = 86.297453949 PSI no matter how many decimal points I add this is far too few PSI.
I say it is the Cylinder head because if I take for a short run I find drips of unburnt oil and fuel sprayed onto the exhaust as well as dripping from the bottom of the cylinder head. also when I remove the Head there is a distinct burn pattern at the bottom Inside stud closest to the Bike body.
While the cylinder and piston was in for bore I sent the head to get checked for warping or other. From my mechanic he seems to think it all looks okay.
Yesterday I added as recommended by my mechanic some Shellac to try resolve this issue. But it seems to still be low compression (no change)
Please every one I am now getting tired of being left at every traffic light by P125's and his dog.