Anyone use the 701 as a track bike ? I went to school and had my 390 Duke striped and had a blast. My instructor recommended a motard. He said my form and skill set it would be a better fit.
There's a few guys rockin the 701's on tracks here, with their versatility, you can ride them on any track. That said they're more suited to shorter, twistier road courses than higher speed tracks, and IMO are a bit to big for go karts compared to their MX based brethren. Maintenance side of things, way less than an MX based motard, little bit more than a sports bike.
Saw two the day I was on track but didn't get to talk to the riders on them, one was a instructor. The Duke has a speck class so I may race it but we were on a good sized road course and the big bike's could get 140mph down the straight. Little Duke was done at 97 but really got them in the twisty sections. Don't want a MX 450 as they are rather short lived so the 701 looks like the next best choice, but I am still shopping.
Ya imo mx 450 would be a stretch at 140 mph. But the twisties you'd kill em. Guys around here are putting over 200 hours on the mx 450's before worrying about a rebuild. With the right gearing you should be able to hit 100 mph on a 450 wheeling the whole time!