Jump to content
Sign in to follow this  

Honda 400ex running rich?

Recommended Posts

hey i got a 2000 400ex and it seems to be running rich i got a dg pipe a 152 main and a 42 pilot, i removed the choke and drilled holes in the airbox lid. i still have the stock air filter, but im thinking about getting a uni filter soon which should help...i think any suggestions on what i should do. thanks

i just pulled the plug and this is what it looked like

photo.jpg

DSC00949.jpg

Share this post


Link to post
Share on other sites

Insted of the UNI, get the ProDesign (ProFlow) air filter setup. The filter is made by UNI, but it has an aluminum adapter and cage that will not bend (the UNI cages are plastic and the lip will bend over time and have to be tossed!). The cage is way less restrictive than the stock one so this will indeed lean you up some, but this isn't really the proper way to jet a carb.

http://www.prodesignracing.com/pro_flow_kits.htm

Share this post


Link to post
Share on other sites

ok i am pretty much a 400ex god 1 the 42 pilot jet is to big for a stock 400 go back 3 a 38 the main jet is fine thats what comes with with the slip on i had the same exhaust on my 01 and u should b good

Share this post


Link to post
Share on other sites

i have a kx 100 and a buddy is wanting to trade me his 400ex that needs pistion and rings and tires i dnt know much bout the 400ex any advice

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:

Sign in to follow this  

×