Kasper1974
09-29-2012, 06:51 PM
Hey guys, well I got back to work on the teardown of the R today. My question is this, on an "85 250R, how far can it be bored out before I need a new sleeve? I checked mine today and it is rite at 67.2 to 67.3. There is a ridge where the piston hits TDC and transitions to down stroke, can I still bore this out? And if so to what size? And what size piston will I need? Thanks in advance for your help.http://www.3wheelerworld.com/images/smilies/wondering.gif