Twoply 0 #1 February 1, 2009 My xr 250 started puffing out some good amounts of smoke the last time we went out. I figure rings and piston so after about 4 beers worth of work, here she is. Quote Share this post Link to post Share on other sites
DaveBjork 0 #2 February 1, 2009 The condition of the piston indicates dirt ingestion. Usually there is cooked oil below the rings from blow -by. Be careful with your air filter. Quote Share this post Link to post Share on other sites