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starting out fresh
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Posted by: journeyman

Ok I just bought a 05 400EX.I want to put a pipe on but dont know if its a bad idea to do an exhaust upgrade with air and/or jet?????anyone got any info on what to go with as far as which pip,air, and jet???

thanks alot

Posted by: 6arett

If you want to spend the money then its fine. You should try HMF pipes and UNI air filters if you're looking into pipes and air filters.

Posted by: journeyman

what i meant to say in my post was that i didnt know if it was a bad idea to do an exhaust upgrade WITHOUT doing air and jet?????

sorry

Posted by: 6arett

If you don't re-jet it, you might run into running it to lean or to rich. An airfilter won't really matter, my friend has his quad set up with a pipe without a diffrent airfilter.

All the airfilter will do is add that extra punch (to pull whilles easier and stuff like that)

Posted by: journeyman

so your saying to do an exhaust and jet upgrade at the same time....air can come later?

Posted by: 6arett

Yes

Posted by: journeyman

thanks alot....what is a good jet kit to you?????Ive seen k&n stages 1+2,moose,dynojet and some other off brands....any suggestions???

Posted by: huffdaddy_400EX

Unless you plan on changing your jets often (like changes in altitude) I would suggest just getting the jet(s) you need...costs a lot less. Usually you don't need every jet that the kits come with. Most re-jets are done by changing your main and needle jets