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Mile high jetting.
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Posted by: Ol'89r

Could any of you mile high guys give a recommendation on jetting on a '99 WR400 Yamaha for above 7,500 to 12,000 feet?

Posted by: VintageDirt

I'm checking with a guy that knows the answer and I'll let you know if he lets me know. It gave me an excuse to try and get in on a ride up at his cabin in Colorado. He also just got a KTM 950, so maybe he'll let me test crash that for him.

Posted by: VintageDirt

Here's what Jim said he used:
162 main, needle in 2nd position, 45 pilot and fuel screw at 1.5 turns out.

Posted by: Ol'89r

Thank you very much Wes.

We're setting one up to do the Colorado 500.

Posted by: VintageDirt

I don't know what kind of exhaust he had, want me to ax him?

Posted by: Ol'89r

Quote:

Originally Posted by VintageDirt

I don't know what kind of exhaust he had, want me to ax him?

Yes please.

We are running the FMF w/the Q tip.

Posted by: VintageDirt

Are you riding the 500? I always wanted to, but I'm too much of a puss to make it now.

Jim's gonna get back to me on the exhaust, soon I think. Oh, Jim can tell you exactly what kind of milage you can get too.

He said he used the stock exhaust with a thumper insert.

Posted by: Ol'89r

[QUOTE=VintageDirt]Are you riding the 500? I always wanted to, but I'm too much of a puss to make it now.

Thanks VD. I'm setting the bike up for a friend of mine. If his schedule does not allow him to ride I will be his back up.

One day is over 200 miles,

not sure I can make it either.

Would be fun to try though.

We are going to do a db test on the exhaust. May wind up running the stock one.

Thanks again.

Ol'89r

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Mile high jetting.

This is the text version of DirtRider.Net Click Here for the Full Version

This is the text version of DirtRider.Net
Click Here for the Full Version

This is the text version of DirtRider.Net
Click Here for the Full Version