Riding High - Jets on the carb - Honda Foreman Forums : Rubicon, Rincon, Rancher and Recon Forum
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post #1 of 2 (permalink) Old 09-16-2019, 05:38 PM Thread Starter
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Thumbs up Riding High - Jets on the carb

I live in Louisiana at sea level with a stock Honda Foreman 500 carb. I am making a trip in November to elk hunt. The elevation on the west side of the state could be up to 10000 ft. I have searched for an answer and found a great article on 4stroke.com titled Motorcycle Carburetor Jetting. Good read.


This article says to go down one main jet size every 2000 feet. So if I have a 160 main jet at sea level I would drop to 140 at 4000 feet. BUT it says if the temp is 50 degree colder I should run the same jet that I ran at sea level, 160. I do anticipate that in November the temp will go from 30 to 0.

Does anyone have any experience with this issue and what I can do to prevent power lose and possibly burning up my engine.
Thanks in advance.
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post #2 of 2 (permalink) Old 09-18-2019, 07:43 PM
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On the older machine...’01 Honda rancher 350...we never had problems running stock jets in the mountains 12,000 ft...(home is 2,800 ft). It did lose a little bit of power but not much....was only like 45* at night tho...and not 0*...I only rode high in the summer so I’m clueless on the cold side of it..
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