2001 kawasaki ninja 250r. has been a daily ridden bike since i bought it. i have not owned another vehicle in the year and a half i've had it. the first year it was fine. the past couple months it will not idle anymore. idle air adjustment hasnt fixed the issue, hasn't been sitting so no clogging problems, no noticeable vacuum leak. any solutions?
If the bike has sat outside in the rain , drain the carb bowls and the tank, then refill with fresh gas. If you don't know when the last time a valve adjustment was done, get it done as well as replacing the spark plugs.