Thanks guys, I also just found out that he had replaced the throttle cable. If that wasn't done right could that allow extra oil to get in?
Jx650 fastest way to tell this is to pull the plugs befor you start it see if any coolant on plugs end or on top of pistons, also the plug and piston tops will be real clean if its coolant or water getting in.
So I pulled the plugs and they look clean except for the tip is black, what would it mean if there's coolant getting into the engine?
Maybe the motor was fogged?
Maybe full of cheap oil?
Maybe the engine has been started and stopped so many times without really warming up, the crankcase and exhaust are all loaded up with unburnt oil?
Here's my point. I wouldn't get too concerned about a problem like this until you get a chance to let the sled get good and warm - and then watch how much oil it's using. FWIW
ISR- Idiots Shouldn't Rule. There is a very fine line between "hobby" and "mental illness" Yamaha rocks.......Fastest 1000 in the 600 stock class. Living life in the fast lane....1000 feet at a time.