K and N Recent Questions, Troubleshooting Help & Support

It's starving for fuel.

here is one or you can go to kfx450hq.com good luck with your project.

did you set the float height correctly? It still might be flooding some also.

That sounds like it is running too lean. You may need some carb adjustments to account for your altitude.

Hello, The problem with ethanol gas is that the alcohol eats rubber. The rubber in this case is the fuel lines and the rubber O-Ring located on the carburator bowl. The bowl itself collects junk in the gas and the O-Ring degrades and lets air in /therefore less fuel gets to the engine! Yo need to take off the carb bowl and clean it and also inspect and possibly replace the O-Ring if it has any cracks in it at all! It would also be a good thing to clean the tip of the needle valve while in there. Good Luck Rich Lilja

I had a similar problem on one of my bikes. Turned out a "Test Port" had rattled loose between the carb and the intake. I threaded a screw in the hole to prevent the leak and problem was resolved.

Let it sit out and dry for a few days if that doesnt work wd 40 the hell out of the starter . If no resolve , replace.

Replace the starter relay

oppss ... you need factory service manual for cdi and other resistance specifications

remove screw or large hex head plug in bottom of carb..drain and replace screw or plug.. . A K&N must be clean, lightly "oiled",, and dry..

I would bring it to a mechanic.

Maybe it isn't the filter. Have you cleaned your gas tank, you may have junk in it. What about your exhaust, have you cleaned that. It sounds like the caburetor. Are you putting fresh gas in the tank? Are you putting K & N oil on the filter. Try another filter if you think that is the problem. Try using Seafoam in the gas tank, can get at O Riellys. Could be spark plug. To be honest it sounds like all the things mentioned above need to be cleaned

Could be a problem with a bad float that is overloading the engine with fuel. Does it take a little bit to "clear its throat" once you are on flat ground again?