I just picked up my second X. It's an '08 that has 30 miles on it. It literally still brand new, rock stock, no wear or dirt on anything, even the tires. The guy bought it, rode it around the yard with his kids a few times and that's it. When I test rode it eveything was fine. When I got home I rode around some and every thing was fine. The next day I start it and notice that after a few seconds, blue smoke starts coming out the exhaust. Thought maybe it was just loaded up so I reved it up a few times but the smoke continues. I've had my '05 since it was brand new. I concider myself pretty well versed in crf 250 dept. My '08 sounds absolutely fine, it just smokes now. Do you think maybe the valve stem seals dried out from sitting? Or ???????????