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post #1 of (permalink) Old 03-07-2001, 12:33 AM
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altitude/pipe jetting

Does anyone know what size jet to use at 7000 feet elevation? Its a 00 400ex and I am going to put a K&N on it and either a Yoshimura or HMF slip on too this spring. The quad has never been jetted and I know that I have to be missing a lot of power, so if anyone can help me out I'd appreciate it.

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post #2 of (permalink) Old 03-07-2001, 02:04 PM
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Re: altitude/pipe jetting

come on I know somebody has to know....

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post #3 of (permalink) Old 03-07-2001, 03:44 PM
 
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Re: altitude/pipe jetting

what is it jetted at stock? and did you buy it from your area??
if you can, cleartoy will be the best to help you with it...the 400EX is a 4stroke and I am not sure of the jetting setup for that...I mostly do the 2 strokes...


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post #4 of (permalink) Old 03-08-2001, 12:50 AM
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Re: altitude/pipe jetting

I am not sure what it came jetted at stock, but I bought it in Denver which is 5300 feet so I had a substantial elevation increase to my town. Ive heard that they are usually jetted a little rich from the factory so how does that relate to the thinner air up here....?

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post #5 of (permalink) Old 03-08-2001, 03:04 PM
 
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Re: altitude/pipe jetting

well the thinner the air...the smaller the jet...to adjust for the difference in air...so maybe contact the dealer and ask them what they come with stock and check if they prepped it for your elevation before you start getting to deep into it...

courtesy of cleartoy:
Elevation(higher) will make the bike run rich. you need to jet leaner. Just remember to change the jetting back before you ride at lower elevations again.


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post #6 of (permalink) Old 03-08-2001, 03:46 PM
 
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Re: altitude/pipe jetting

ummm airborn dont you have that backwars? if the air is thinner you are going to need less gas so a smaller jet would be in order..correct me if im wrong

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post #7 of (permalink) Old 03-08-2001, 05:02 PM
 
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Re: altitude/pipe jetting

nu uh i do not...what ya tryin to say?? huh?? dammit man...I was just tellin them what i sed above..u got a problem with that?...hehehehehe
yes I was wrong but I corrected it so there is no confusion...
I guess too many projects can mess with your head....


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post #8 of (permalink) Old 03-10-2001, 12:36 AM
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Re: altitude/pipe jetting

I think that the EX came stock at sea level with either 155 or 165 main. I dont know for sure. Lets say it had a 165 main. I would shoot for a 157main at 5300ft. Do a plug chop and read the spark plug.

-cleartoy

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