Hey guys, listen I jus bought this nice 2003 400ex.Recently its been blowing a lot of blue smoke when im riding. I know this could be rings but could it be something else? And if it is the rings should I get the cylinder re-bored or jus re-honed. The quad doesn't have that many hours on it! (Supposedly) and how much do you think it costs for someone to do this rebuild for me...or should I do it myself?....how many hours of work and money am I looking at here? Please help!!

 

it's a shame cuz the thing runs smooth and still has a lot of power compared to my other 400ex that i have. but this one jus blows a lot of blue smoke when riding thru rpm's