my buddy had his up to 115 on speedo when he first got it, but there may have been some slight track spin to factor into that as well, because he didn't have studs and it was a real icy snow, very hard pack
My buddy had one sort of tricked out, no stock SRX could touch him (when it ran right....burned it down two times), GYT twin pipes, 196 picks Artic Cat secondary and a lot of other stuff, he got tired of working on it every day to get it to run right.
I had 87 on my gps from our early february trip. I've had the speedo over 105 before but didn't have the gps then. I was w.o.t. but I was running out of room. It might top out around 95 or so. I'm not picked but I am piped but the conditions weren't real great for power, about 32*.
Think about it guys - Speedo is directly hooked up to the track. It is reading track speed, not vehicle speed. Even cars are off a little bit when tires are changed or worn. Need a GPS to better gage but radar is the most accurate and still has it's issues, just ask the cops.