[MickJP]

I’ve had my 08 500 Touring EFI for about 3 months now. As you guys have seen I’ve added a few things here and there (haven’t you all) and I’m really enjoying it (as are my kids). Other than my second puncture this past weekend (do I hear Bighorns calling?) things have gone well. I’ve gone as far as 90 miles without having to add gas, and I’ve never needed more than 4.5 gallons to fill it up (despite the gauge flashing like crazy). One of these days I'm going to run it dry to see how close I can get to the rated capacity of 6.1 gallons. I’m averaging in the 18*20 mpg range so I’m happy enough with the mileage vs. power trade*off I made with the 500 instead of the 800.

All of my riding is at 5,000 ft and above, however I definitely get the feeling that at altitude (7,000 * 9,000 + ft) the quad is bogging down. I know that power drops as you go higher, but in a couple of sticky situations I thought it was going to stall on me (not where you’d want to either). I pulled the plug and it looked like it was running rich. The reason I mentioned the mileage above is that I’ve read on the forums that others are getting as good as 22*24 mpg. My 17% lower mpg would support that it’s running rich. Everything is stock and I had the quad serviced at 20hrs (it now has about 40 – 50 hrs on it) and the air filter looks ok.

How much does the EFI compensate for the altitude?
Is there anything I can do to adjust the mix?

Any and all other ideas are welcome!