Ok, I use to live in MT and ride at elevations around 5700' to 8200'. When I moved to CA for work
......I moved my sleds (3 - 144" Mountain Vipers) to my brothers' place in CO. i would visit them and ride a few times a year there. The elevations we were riding at were 8000' to 11000' In CO, one of my vipers was having a slight problem last year.
Due to the elevation change, I knew the machines were running too rich, but since they weren't being run that much, I didn't bother to re-jet them. The problem I was experiencing, and only with one of them (they're all jetted the same) was that I would get the DCS light at wot in the powder (no snow blockage). However, I wouldn't get it on the trail. I had rebuilt this viper engine two seasons prior and had no problems. I go thru the carbs every year, and all the normal maintenance. Rpm at wot in the powder or on the trail was holding 8500rpm. When DCS light came on I would hear just a slight difference in sound. I would back off the throttle and the light would instantly go out at around 8200 to 8300 rpm.
I haven't come up with a reason for the DCS light in powder at that elevation (around 9500'). Any thoughts would be appreciated.
I've finally moved the sleds out to where I live
here in CA
I plan on leaving the jetting as is since I'll be back at the MT elevations. I'm just wondering if anyone had any theories as to the DCS light.

Due to the elevation change, I knew the machines were running too rich, but since they weren't being run that much, I didn't bother to re-jet them. The problem I was experiencing, and only with one of them (they're all jetted the same) was that I would get the DCS light at wot in the powder (no snow blockage). However, I wouldn't get it on the trail. I had rebuilt this viper engine two seasons prior and had no problems. I go thru the carbs every year, and all the normal maintenance. Rpm at wot in the powder or on the trail was holding 8500rpm. When DCS light came on I would hear just a slight difference in sound. I would back off the throttle and the light would instantly go out at around 8200 to 8300 rpm.
I haven't come up with a reason for the DCS light in powder at that elevation (around 9500'). Any thoughts would be appreciated.
I've finally moved the sleds out to where I live

