When a vehicle is running rich, the fuel-to-air ratio is off because the carburetor is delivering too much gasoline. Typical symptoms of a rich mixture are: Poor fuel economy. Sluggish acceleration. Choke not needed from cold starts. Sooty or black spark plugs. Sooty or black muffler end pipes. Strong smell of gasoline when the machine is at idle.
Though the previous generation Ninja 250 had a peak power advantage of 1 to 5 hp (0.75 to 3.73 kW), the new version's 20 or 30 percent increase in mid-range power allows the bike to pull from 3,000 rpm where previously it had to be revved to 4,000 rpm.
2013 KAWASAKI NINJA® 300 ABS Quick, Strong, and Easy”¦ The Ultimate Lightweight Sportbike After years of unchallenged domination, the best-selling Ninja® 250R sportbike had finally begun
Petcock is opened by engine vacuum when running. In the carb bowl, there is a float with a rubber pointed valve (needle) which shuts the fuel when proper level is reached. If a carb is leaking when engine is not running, then both, the petcock and the carb valve are leaking. The petcock is a rubber diaphragm and they sell kits to 'rebuild' them
I recently got a 98 250 Ninja that has been sitting for two years and a hose is missing from the T that goes between the tops of the two carbs. I dont know what this hose is for or if it needs to be hooked up to something, they look like they might be a vent for if the float valve stays open but I would inmagine that 92059C needs to get hooked
Hold the float gently up to simulate a full float bowl and connect the gas line to the carb. Remember the gas is only going to push up the floats gently, by pushing too hard you will get it to shutoff even if it is worn out. If it leaks, it may just be the float needle is damaged.
All Balls Racing Carburetor Rebuild Kit Kawasaki Ninja 250R 2008-2012 $ 65. 69. 8. Fits your 2008 Kawasaki Ninja 250R. K&N Air Filter KA-2508 $ 98. 00. 522.
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ninja 250 carburetor problems