Not a lot of turbo riders out there and few commersial turbo kits. Most of them are R&D for season 2014.
I think turbo bikes is the way to go.
Of course not a cheap option for the average snowbiker but tons of power. Not the least lots of fun! Me as a flatlander I can imagine the advantage riding at 10000 ft
Built my turbo kit by myself and no of the shelf kit so my feedback is not as a regular turbo kit customer.
Have ridden my turbo for only one season and I'm very pleased of the performance and reasonable realiability. Reliability is difficult to predict. My bike was a brand new 500 EXC, time will tell. Cranking 100+ hp will probaby kill the engine in the long term but if you be more resonable with 85-90 hp i think you have a bike for regular use.
My only issue was that i blew the head gasket (coolant from radiator bleed) at the end of season. Don't know why but I ran stock compression and race gas, maybe bad luck. Will look for the option for low comp piston. That will hopefully help...
My track is ST. Track speed was too high. If you run a turbo, go for a LT. My new track kit will run a 59 mmx3460 mm.
Gearing is different than a N/A bike. Currenly running 14-16-17-21.