kfx400
- Thread starter kandrsn
- Start date
the big 3 are spark, fuel , and air.... check for spark, fresh fuel at the in the carb bowl, drain out old stuff, and make sure the air cleaner is cleaned and oiled... Try a clean spark plug as well, you might be wet fouling it with old gas
GWNBrute
Active member
how long did it sit for?
sledneck48
Active VIP Member
had the same problem with my LTZ-400 which is the same as the kfx as u probably know. It would crank and wanna fire 4ever but never would fire.
Can you bog start it with another quad or truck.
My problem ended up being a common problem with these motors as they come with steel valves with a hardened coating on the valves and if dirt or sand gets by ur filter it takes the coating off and the valves stretch and the tappet clearence becomes zero causing a compression leak
Check ur tappet clearence and if any are zero ur gonna have to check the valves for wear
Can you bog start it with another quad or truck.
My problem ended up being a common problem with these motors as they come with steel valves with a hardened coating on the valves and if dirt or sand gets by ur filter it takes the coating off and the valves stretch and the tappet clearence becomes zero causing a compression leak
Check ur tappet clearence and if any are zero ur gonna have to check the valves for wear
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