guys, i have been MIA for 2 years. my last bike was a 09 kx250f and loved it, i rode woods and raced harescrambles. sold that bike and my new 2011 yz250 with 2 hours on it and havent been on a bike for 2 years, the shop im working at now has a really clean 07 yz450 and the prce is pretty good. my one buddy, who was on here (qwik12beat), had a yz450. we rode together alot and he seemed to like his bike, but he was involved in a very bad accident at a race almost 2 years ago and was killed unfortunately. my question is, is there any major known problems with these bikes i should look for? the bike has sat at the shop for prolly 2 years so when i get slow at work im gonna pull the carb off and clean it good. any motor related problems?