Engine Bogging over whoops?

[NoWingNoPrayer]

Over the last 2 months i have noticed that my 400ex is dieng/Quiting when i get really hard on the whoops. i was wondering if its in the carb or electrical .. it feels like its out of gass and then when i slow down it runs fine again..

[NTPRacing#19]

does only happen in whoops?

[luvmyex]

Shortly after i bought mine it was doing the same thing.On biger jumps to,right? I's say you have some trash in your carb.Probably in the bowl or jets.Take it apart and clean it out with some good carb cleaner.That should solve it.

[NoWingNoPrayer]

Yeah only when im hitting whoops.. not like im just riding over them. just hittin the tops bout 3rd 4th and 5th

[NTPRacing#19]

yea def take off the float bowl on the bottom of the carb and then spray some cleaner in there and check the floats. sounds like they are sticking closed when you bounce.

[NoWingNoPrayer]

ALright thats 2 people tellin me the ame thing ill take your word for it.. Thank you very much.

[400exredrider]

yes check the float bowl i had that problem but worst i re jetted and forgot to put it back in.......also check main jet could be loose.

[nastynotchback1]

i am having the same problem.when i jump table tops and i try to gas it in the air it acts as if it were out of gas. as soon as i hit the ground it takes off normal.mine is only 2 months old.

[02 Red Rider]

I had the same problem hitting any bumps when I had my Recon. I took the carb apart and found that I had a little piece of grit in the carb bowl. I cleaned it out and no more problems (for a while). I found my self taking the carb apart over and over again and cleaning it out. I finally ended up picking up a $1.50 inline fuel filter at my local dealer. I never had to clean the carb out again.:D

[Mity Mo]

This is a common problem. Anybody who rides over rough terrain very fast should have this problem. You need a Bog box. Its a black box with foam in it that tees into your carbs air lines. It allows the carb to burp without loss of fuel. Runs about $25-$30. Mo:p

[400exBro]

where can i find this box??

and where does it go??

[southex]

I had the exact same problem w/ my 400.
When I hit bumps/woops it bogged down till it almost stalled.
All I did was rejet and it has not done it since.

[NTPRacing#19]

i havent had any problems like that with mine and i hit some pretty good size hits

[terko440]

I had the same problem with mine when it was new in 99. Must just be a bug that just has to age itself out.

[400exredrider]

also there is a carb vent system.....ive heard it works alright and stops bogging.

[JOEX]

Originally posted by 400exBro
where can i find this box??

and where does it go??

I think it goes in front of the ATF injecter.

Joe

[Mity Mo]

Its called a PC vent box. They tee into breather lines from carb and it usaully is mounted in the airbox. Very small and very lightweight. But extremely effective. Mo:D

[KAWSAM62]

just a thought you could be hitting the rev limiter if your running full throttle and getting air born it would feel like the engine was out of gas then when the rs come down it would run fine till you hit the rev limit again but a fuel filter is a must to keep dirt out of the carb:ermm:

[400exredrider]

Exactly Mo :D ;)