Carb altitude settings???? : Kawasaki ZX Forums: Kawasaki Ninja Forum

crashtech · 04-19-2008, 07:48 AM

I am planning a trip out west this year in Aug.. We are going to ride a 4000 mile loop through the rocky mountains from New Mexico to Canada. We are going to be 5000 feet and higher for most of the trip. Any of you guys (or gals) have any input on carb settings for high altitude. I got on the dynojet site and compared the two kits and the only diff. in them appears to be jet sizes. They are only one size apart (150 for H. Alt. and 155 for reg.) I have it tuned with the 155's at 800 feet (home region) and it runs great! Not rich or lean just right. I was thinking about dropping the needles a notch or two. I ride the north GA mountains on a regular basis and it does great. I think they are about 4000 feet. I am going to try and go to the skyway this spring and see how it does up there at 6000 feet. Just wondering what you high altitude guys (if any) have your dynojet settings at. Thanks for any input.

mcriderzx11 · 04-19-2008, 08:10 PM

I ride at a similiar altitude and I have not had any problems with the standard IJ mod of about 2.5 turns out and the needles shimmed 1.0 mm and I have used this on the BRP up the high point at about 5600 as I recall. On another note, winter has begun it's retreat in earnest in the northeast and it sure is good to twist a throttle and I am a hard core skier... 50+ days this year... Have a great trip CT and I personally would not worry to much about the carb settings for the short duration of this ride. Tune for the home field and you should be fine.
Good luck Amigo

Lngtmezxfan · 04-19-2008, 10:54 PM

I have a '92 zx-11 with Vance & Hines full exhaust. It is running so rich on the bottom end that it is dropping a cylinder at idle. I have only had the bike a few months, and was wondering what size of jets that I would need? A mechanic verified that the stock jets are in place. I just don't want to spend $800 for them to re-jet it.

crashtech · 04-20-2008, 08:06 AM

MC...Thats what I was thinking...I am going to leave them alone for now and try the skyway soon. I have the dynojet kit installed allready and like I said before it runs awesome!! Thats why I was looking at there high alt. kit to see any diff., only being the jet sizes. Oh the ride will be one for the record books for sure, I cant wait.

Longtime....If you have the stock jet sizes, i would look at other things. I would also look at other mechanics if they want 800 to change jet sizes (hell, I would do them all day long at that price). If he verified the stock sizes he was allready in them and should have changed them at that time. You might need to totally dissassemble and complete cleaning. Total carb rebuild and jet kit installation around here ranges from 450-650.

crashtech · 05-12-2008, 02:50 PM

Come on guys (and gals), I know there is a zx11 in Co or someplace in the mid west mountains over 5000 feet. I would like to know how it runs at alltitude. If you know your carbs I would also like to know your settings. Just got off of the phone with Dynojet and they told me to just take the filter out. ???????????? Thanks in advance, Brett

ron4x4 · 05-13-2008, 10:54 AM

I run my 93 ZX11 C4 from Reno (4900) to Truckee (6400) almost every day in the summer and it runs perfect with just the Shimmed needles and the IJ 2.5 turns.
I expected it to run a bit rich, since I bought it from a guy at 2500ft, but it runs really smooth.

jay69mx2000 · 05-18-2008, 07:06 PM

I have A 94 stock carbs no kit needles are shimmed and i have 158 #1 and #4 155 #2 and #3 pilots stock size 3.5 turns out with muzzy exhaust 3 turns will also work I live in central Wyoming 5600 average elev.