Stall in Neutral and 1st Gear - Ninja 250

by Lin
(VA)

Hi,

I'm very new motorcycle and just recently got a 2009 ninja 250 with 2600 miles on it. I have only been on it about six times, since weather is getting colder. The first two times I rode the bike, it was fine. But later I noticed when I start in first gear and trying to give it gas, it slowly went into stall. I tried it couple more times and the same thing happened. I believe I got the friction zone down pretty well. I also noticed if I just keep in the friction zone with no gas for awhile and eventually the problem goes away. I did check the throttle play and clutch play and they both seem ok. I still need to check my air filter. Any other things I should look into that might cause this problem. Oh, the idle speed is set at 1300 rmp. Any help would be greatly appreciated.