How long have you owned the sled, and is the front end height different now that it used to be?
All SXR's have long travel suspension, front and rear, so the front end should not generally seem low. Is your rear end jacked way up?
I'd check out all of your stock components, may have broken, missing, or out of adjustment parts. Maybe someone replaced the front long travel shock/springs with short travel versions. Did someone lower it in the past for racing?
If the original skiis were replaced with the later model saddless skiis, or incorrect aftermarket skiis/mounts, the front end would be about 1" lower than stock since the spindle bolt is located higher in the stock ski saddle than on some of the other skiis.
Pics would help with any of this if you can post some.