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View Full Version : jetting question on 2000 400 ex



MichiganMOOSE79
04-15-2007, 06:48 PM
i just got a 2000 400 ex it has t4 slip on pipe, dyno jet kit with it, uni filter, and bunch of hole in air box lid, my question is i live in michigan, what should the proper jet be with this set up, the only one missing out of the kit is the dj134 main jet does this sound right! ive never messed with jetting before on my quads this was all ready done when i got it, any help would be great!

drag93ex
04-15-2007, 08:19 PM
need elevation and usual riding temps

MichiganMOOSE79
04-17-2007, 10:54 PM
sorry, about 1100 feet above. and riding temps range from 40-100

Eviltanker
04-18-2007, 06:53 AM
You might want to start with the equivelent of a Keihin 155 main and 40 pilot, turn the fuel screw to about 2 1/2. remember this is just a starting point. And don't worry it is EASY just take your time and pay attention to detail.
Here is a chart in this thread that will help:

http://www.exriders.com/vbb/showthread.php?s=&threadid=226919&highlight=jetting