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Honda 400ex carb trouble

2164 Views 21 Replies 5 Participants Last post by  SlammedRanger
Hey guys I’m new on here ... I have a 2002 Honda 400ex I’m workin on for my buddy... it has k&n air filter and a excellerater exhaust by DG performance... it idled fine but as soon as you got into it it would cut out .. unless you turned the choke bout half on then it would run pretty good .. I need a starting point for the carb .. jet size and needle position?
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Yes the quad I’m workin on has a k&n filter on it .. with the air box lid on it .. I live at 640 ft elevation... and the exhaust it has on is a called a xcellerater by dg performance.. not sure if it was jus a slip on.. but I took the carb apart n cleaned it .. seemed like it was pretty clean.. all except the overflow in bowl of the carb was jammed but I got that fixed
I have a video of it running .. but I don’t kno how to post it .. also it idles decent wen I flip the choke on a little bit

Thers the link of it running jus stutters really bad until I turned the choke on a lil n then it runs decent
I’m not sure what kinda jets it’s got in it either cause they don’t say anythin on em
Ok thanks guys ... I have a rebuild kit on the way but I cleaned the carb ... and everything looked free n clear .. another thing I noticed on the bike .. when u hit the throttle .. about 1/2 to 3/4 throttle the throttle wants to kinda bounce ...or like vibrate
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