I had limited hours / mile's on mine so I didn't push it too hard in the beginning. First try I had about 50 miles and had it to 98mph (Without pushing it). Before I went home probably about 70 miles on it and I had it up to 108 mph on the speedo....I would like to mention it hit 95 mph right away, speed gain slowed right up and then crawled about 1 mph per second from there, hit 108 mph and then I ran out of lake! I think the problem was the trail was bumpy, I would get airborne and then loose mph's before I hooked up again to gain more speed.
When I hit the hardpack - the accelleration was spastic! Very horny sled!
The conditions were 16- celcius, about 1000 feet above sea level, still using mixed fuel and the lake trail was extremely packed.
I would say confidently it would hit 100 - 112 mph's fairly easily. (Speedo)
.....I probably forgot to mention that I passed a Blue XC800 Streak somewhere along there too! ha ha!
It is a Blacksabercat F7 Snopro with the 1.375" track.