400ex wont run without choke
I bought a brand new 2007 honda 400ex recently. I have ridden it about 4 times. The first three times it ran perfect. The next time it didnt. It wont idle without the choke being on even after being warmed up and it wont run properly unless the choke is fully on. If I put it at half choke then it runs and idles fine at half throttle but if I go full throttle it bogs down and almost dies. It ran fine one day then the next this happened. I have no idea what it could be.
Re: 400ex wont run without choke
i would try cleaning the carb... mine did the same thing... while you got the carb apart go with a 42 pilot jet... it will help so much on starting wont ever need the choke... if you have a slip on you need to atleast go with a 155 main jet to or you will burn your vavle seals up because they come stock running lean out of the factory... but clean the carb and air filter im guesing thats your problem