My engine (400ex) bogs sometimes when I land after a jump. (I race mx) The engine is stock with only a white brothers muffler and a k&n filter. It's jetted for 2250 feet. (Las Vegas, NV) Please help. Also has anyone had to replace or file their pegs? My feet slip somtimes.
Thanks, Ron ZOOTUE RACING

 

One problem with jumping a quad is bogging, there is a company out there( im not sure what the addy is) that sells a rounded bottom for the carb, and it is said to stop all bogging. you could also try the carb vent.

 

Try www.carbparts.com
These guys know what they are talking about.
Once you get to their site, Email them and ask the same question, they will get back to you with the answer fairly quickly.