Join Date: Jun 2008
Location: Moore/Oklahoma City
Had a similar problem with the GF's 08 ninja just yeterday. It sat for 2 weeks while we were gone. Went to ride yesterday, and it wouldn't stay running unless on full choke. We rode just a bit to see if it would "clear" up and idle normally. It didn't.
Changed the plugs, everything is back to normal once again. Now, I don't know if plugs are part of the 1st maintenance with these, but I do the work on it. Did the 1st oil change, lowered it, etc..
So, I'd suggest investing in 2 new plugs, (less than $10) and give that a shot.
If that's not it, run some seafoam in the tank, 1oz seafoam to 1 gallon of gas.
This will help clean up the carbs. It is possible the bowls need to be emptied, bad gas, or more. Start with the plugs, IMO.
+Pearl White CBR600-Mine+
+08 Ebony 250r-Hers+