This topic has been covered in previous posts but I am not able to determine a clear cut plan of action due to conflicting opinions. Bike: 2010 kx250f I am not sure whether to attempt to deglaze my cylinder with a scotchbrite pad as some say that this is a good method and others say this will damage the nickasil on the cylinder (a local mechanic says NEVER to do so as the cylinder will be damaged). This is the second ring change (first was with the piston), the cross hatch marks are not visible where the ring comes in contact with the cylinder wall but underneath that point there are cross hatch marks. The first piston change I did not deglaze and it seemed as the ring did not seal properly as there was less compression and black exhaust smoke on warm ups. Please if an experienced mechanic could give a conclusive answer to this subject!! HELP I NEED TO RIDE!!!