kfx 400 probs
#1
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I have an 04 KFX 400, the problem is it runs as if it were starved for fuel when in gear but not nuetral. I pulled the carb and cleaned it but the prob persists. I will sit on it and rev it and its smooth but as soon as I put it in gear even if the clutch is in it sputters, it doesn't stall and it idles fine. Pleas help.
#7
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#10
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If you plan on keeping the quad the best investment you can make is to get a good O.E.M. or Haynes Service and Repair Shop Manual , it will pay for itself with the very first complete serving of your bike ; do a plug check to determine if your air/ fuel mixture is right ! Check the color of the spark plug tip , if it's a white/grey color you are runing lean ; if it's black you're rining rich the color should be a tanisih /brown color when you have the mixture correct ! And don't count out the valves being off spec. if you've never had them adjusted , and if the guy before you never had them adjusted they could be off spec.'s ; i've seen them run good in newtral and bog down and stall out under load before ! And it could be caused by dirt/trash or water in the fuel tank , and it could also be from carbon build up in the combustion chamber as well ; get a clear container and remove the fuel line from the carburator and drain the fuel from the tank into the clear container to see if water/dirt or trash is in the fuel ! If the gas look's and smell's right check and adjust the valves if thy're off spec's , mix some Sea Foam in the jug of fresh gas ; but before you pour the mixed fuel into the tank i would splice the fuel line and install a clear fuel filter between the gas tank petcock/on,off.reserve fuel valve and the carburator ! Then pour the mixed fuel into the gas tank and rung the quad untill you've burned the mixed fuel , to make the job quicker you could get a can of Deep Creek in the spray can ; it's the same stuff as the Sea Foam only it come's in a spraycan ! You can remove the airfilter and spray it diirectly into the carb , it will burn off the carbon build up in the combustion chamber quicker this way ; just follow the direction's on the can's and don't freak out when it start's smoking ! It will smoke while it's burning the carbon deposit;s , and it will stop smoking when the combustion is cleaned out ; you can get the Sea Foam and Deep Creep at most auto parts stores like , Auto Zone Advance And O'Reillys Auto Parts Store ; i got the Sea Foam at O'Reillys Auto Part's Store for $5.99 + tax this stuff is the best i've ever used ! I bought a 88' GMC Jimmy 4x4 MPV that from a used car dealer who told me the engine and drive train had been rebuilt and only had 87 thousand miles on it since the rebuild , but after i drove it about 75 miles it would blow out a puff of whitie/blue smoke when ever you had to stop at a traffic light and had to wait 30 to 60 seconds for the light to change ; when you gave it the gas to go it would blow the puff of smoke ! It would clear up as soon as you got going ! Two week's after i got it , i tried to start the engine and it jumped time , i had to save up the money to buy the part's ; it took me over 6 month's to buy the part's ! The Jimmy had almost a full tank of gas when it jumped time , so i poured a 16 oz. can of Sea Foam in the tank to keep the gas from going bad ; i got 2 of my brother's to rock the Jimmy to mix up the gas and had to let it sit up for the 6 month's untill i could but the part's ! After i got the part's i tore it down and replaced the timing chain and gear set , i also had to replace the starter and flywheel ; the i set the timing with a borrowed timing light and removed the cap from the throddle body so i could turn up the low idle speed ! I started driving it again , and it started smoking again only worse this time ; after i used a half tank of gas i went to the Race Track Gas statin and filled the tank with fresh gas ! On the way home i had to stop at this traffic light that take's 5 minute's to change green turning arrow , and this time i looked in the driver side mirror to see the smoke ; but this time there was no smoke ! So i drove down the highway to a small town about 30 mile's from my home ! On the way back home i stopped about 12 time's and let it idle for 5 minutes before giving it the gas ; and still no smoke ! It has been smoke free for over 6 month's now ; so the Sea Foam cleaned out the combustion chamber and stopped the smoking ! The Sea Foam was the only thing that could've claeaned up the combustion chamber , so i use it for everything now 2 and 4 stroke engine's ! ............