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I just moved to Santa Fe, New Mexico, located at 7000+ feet above sea level. My 1992 Honda Nighthawk 750 made the trip fine in a truck and seems to ride well, with enough power once it gets going. But it can be slow to fire up when I try to start it. There's plenty of juice in the battery. Do I need to adjust the carbs or choke? Thanks for any advice from others living and riding at high altitude.
 

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At 7000 feet the air is a lot thinner, so your bike is most likely running too rich, (too much fuel). Over use of your choke will most likely increase the problem.
I would take it in to a shop and have them adjust the carbs. The newer bikes have fuel injection and will automatically adjust for altitude changes.
 

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At what altitude or change in altitude do you normally need to adjust your carburetors? I am at about 800 ft above sea level now but plan on a trip with a maximum about 6000 ft above sea level.
 

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A lot of the time, the jets need to be changed out to adjust the fuel mixture. I would check for any model-specific tweaks that might be able to be done before tearing into the carbs for a temporary trip. Putting in a less-restrictive air filter might do the trick on a temporary or even permanent basis.
 

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At what altitude or change in altitude do you normally need to adjust your carburetors?
After 5000 feet the air pressure changes. Most bikes will do ok at 6000 feet. I have taken my old Goldwing over Tioga Pass many times and that is just over 9000 feet at the summit, and I had no problems at all. However if I had lived at the higher elevations I would have tuned the bike for it. The only thing you will notice most likely is a loss of power.
 

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If you are just going on a trip THROUGH high altitude there is no need to adjust anything but your bike/ car may run a little rich and be down on power during the trip due to less oxygen. 6,000 feet is insignificant.

Sam:)
 
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