Jetting Questions

[DAVE]

I am trying to help out my unckle, he has a 05 polaris 400 it runs fine until we get to about 5500 ft then is starts running like crap, I have notice other 400's on some of the rides doing the same thing. do you know what main jet size should be run for elevations up to 9000 feet, the lowest he rides is 2000 feet. I know we could get a dynajet kit but I was thinking just get a main jet and call it good. what do ya think.

THANKS DAVE

[Mr. Miyagi]

I think Mr. Bill, Ken, Jack and a number of others who just modified their carbs can answer that one..... I'm curious to see how Ken's jetting changes effect his quad in the hills.... Keep us updated.

[Ken]

Personally???


Taking it all apart, just to find out it runs even worse, because you just changed the Jet and didn't adjust the needle....isn't worth it to me.

It's 60 bucks for the kit...and you'll have jets for 3 altitudes, new needle and the clip.

[Ken]

The one thing that came out of it for me.....was before..I couldn't adjust the idle for all the tea in china. Totally frozen.

I was able to take it out....clean all the crud and put a tiny grease drop on the threads....you can actually turn it now.

[DAVE]

Personally???


Taking it all apart, just to find out it runs even worse, because you just changed the Jet and didn't adjust the needle....isn't worth it to me.

It's 60 bucks for the kit...and you'll have jets for 3 altitudes, new needle and the clip.
_________________

Ya I just looked up the dynojet kits your right $ 60 who cares..........they have done the home work.. going to order it. Thanks for the head slap.

[Ken]

I have step by step pictures Dave. I just haven't been home the last couple weeks to do anything about it.


Hopefully, I can do it on Saturday. At worst...I can just put the pictures up for you download, if you'd like some photo assistance.