i was riding my 400 on my track and all of a sudden it started bogging down and going to shut off when i applied any throttle...i runs great at idle though...
any ideas??

thanks alot!!

your petcock could be going bad. turn it to prime and see what happens

just did and it does the same thing....is there a fuel filter that could be clogged???
thanks

did you buy it new? if you did, it wouldnt have a fuel filter. how old is the gas? did you just get gas and put it in it?

yeah..i bought it new in 05...thought maybe they had one like my r450...

the gas is brand new 91 octane that i've ran for awhile

i really doubt you have have fuel filter unless you put it on. i was just asking about your gas because ive bought brand new gas and it ended up being half water and my car die on me 5 miles down the road. it just kinda sounded like there might be some water in it. it will idle but when you give it some throttle it dies or tries to die. i just always try to start with the simplest things first.

yeah...i can drain it and check it out but i already got through a half tank with it running great so i doubt thats it...
thanks

your gas cap could be messed up. when it dies unscrew the gas cap and see if you can here anything. if it makes a sucking noise then the vent is clogged. this will create negative pressure in the tank and prevent the fuel from flowing.

also does it do it all the time or just occasionally?

Clean air filter and no water in the air box?

it just started doing it all of a sudden and has done it since...checked the gas cap and filters....they arent the problem

what kind of CDI do you have

its completly stock exept for handlebars...

Maybe your petcock is clogged.

Clean the carb and check the plug. Check wire connections. You've probably checked all of this already but just throwing out some ideas. Maybe a bad ground somewhere?

how easy is it to take the carb out and clean it....i thought of that but wasnt sure
thanks

its pretty easy. do you have a manual? if not, go get one. it will help you ALOT. if you dont get a manual you might have a hard time. its always nice to have some thing to refer to if you are not sure about some thing.

no..i dont have one...this is sorta my play/xc quad while my ltr is my race quad so i put everything into that..lol

i'll go for it...hope thats the problem

it started working for a little but now is doing the same thing again???...no clue whats going on...it starting doing it on the last 10 minutes of a 2 hr xc race...:(

mine did the same thing,idled perfect but NO throttle response,it did this after aggressive trali riding,i stirred up junk in the carb bowl and got sucked into main jet opening,totaly clogged,couldnt see through it!!!a blast of brake clean did the trick

yeah...i got it home and as soon as i set it on the grab bar to clean it and put it back down it worked..there must be dirt in there..lol..thanks