[cwsnake]

The concept is fairly simple. Higher temperatures makes the air less dense (less air in a given volume than with cooler temps). Higher altitude also makes the air less dense (due to the lower atmospheric pressure at higher altitudes). So the hotter and/or closer to sea level requires a larger jet (more fuel) to keep the air/fuel ratio at an optimal mixture. Run the mixture too lean (too small of a jet) you run the risk of burning pistons or valves from a hotter combustion. Run the mixture too rich you run the risk of fouling a plug. Richer is safer than lean, but lean makes more power.

 

[cwsnake]

If I remember correctly, the jetting is the same from 0 to 3000 ft. One jet size less for over that. It is in the jet kit instructions though. I would think you could find something that works all around. Just check your plug from time to time to see if it is rich or lean. White plug electrode means lean, black means rich. A little lighter than chocolate is good. Do a search on the web there are some pictures of the different conditions out there.

 

[cwsnake]

Like I said, your best bet is to jet following the instructions for your majority type of riding. If you jet it a little rich while at high altitudes, you should be OK at lower altitudes. It is not a fine adjustment anyway. You will need to inspect the plug at both high and low locations to see how rich/lean you are. All quads are a little different, you will have to tune yours to your specific setup (pipe,filter,snorkel, etc.). Just mess around with it and check your plug. If it is white, increase the jet size. You wont mess anything up by running rich (black plug) except for maybe fouling a plug.

Bexxter, when you take the bowl off, pay attention to the plastic shroud that is around the jet. It only fits right one way so shouldn't be too big of a deal if it falls out when you take the bowl off. Turn the carb a far upside down as you can. The jet is right there in the middle. Download the instructions from DYNOJET and there are pictures.