Clean the element in a well-ventilated area, and make sure that there are no sparks or flame any­where near the working area. Because of the danger of highly flammable liquids, do not use gasoline or a low-flash point solvent to clean the element. Clean the element [A] in a bath of high-flash point solvent, •. 470 posts · Joined 2007. #5 · Dec 9, 2007. If it's turning over when you try to start it, then it's either not getting fuel, air or spark. If you know how to check the spark, do that. It's easier then carb work. If it's been sitting a long time it's going to need new gas and the carbs will probably need to be cleaned. 2008 - 2012 Ninja 250R Tech Talk: 71: December 15th, 2017 03:38 AM: Question about adjust idle mixture screws: daverdfw: 2008 - 2012 Ninja 250R Tech Talk: 14: February 28th, 2016 05:34 PM: adjusting idle mixture screws: james250ninja: 1986 - 2007 Ninja 250R Tech Talk: 9: September 1st, 2014 10:29 AM: Idle Mixture Screw Problem: gogoKawi: 2008 There should be a little black lever on the clutch housing. If you pull that lever it will restrict the amount of air getting pulled through the carb. If the Ninja 250 is anything like my old Ninja 500, using the choke is absolutely necessary to get it started in cold weather. Once the engine is warmed up, you can reduce the choke to normal. 1. $15.95 - $59.68. WSM® Mikuni SBN Throttle Valve Rebuild Kit. 0. $23.62. K&L Supply® Carburetor Repair Kit. 0. $33.03 - $33.88. Outlaw Racing® Basic Carburetor Repair Kit. Applied a tiny drop on the small tear (about 1.5 mm long). Assembled back the carb and rode it for about 2 weeks, until the new replacement arrived. Fitted in the new original then was posted to an oversea job. Ok, lately went for a short ride and came upon a new friend using the same J1 -ZX7. He had the same problem before. Kawasaki Ninja 250R Forum A forum community dedicated to Honda TRX250R owners and enthusiasts. Come join the discussion about performance, modifications, builds, classifieds, troubleshooting, maintenance, and more! Even if the petcock is leaking, then the float valve in the carb should stop the gas from flowing. So if it were me, I'd replace or rebuild the petcock, and also rebuild the carb. Make sure to use OEM parts in the carb, if you can afford it. The K&L parts can be more trouble than they're worth. Sometimes they can't be made to work at all. The stock 250R is marketed as a high mileage, economy bike and as such, the factory has seen to jet the bike as lean as possible to eek out the very best MPG numbers and to also adhere to emissions laws in the US. Kawasaki has done a very good job in selecting the best combination of jetting components to make the 250R a very miserly, gas First of all, if the issue is a result of a dirty or blocked carb, you will notice that the engine cranks, but it doesn’t start. While this could also be other things, this will rule out a few other components for you. Remember that your bike needs four main things to run. Those are air, fuel, spark, and compression. OpP6Z.