I have Frontier Classic 4-stroke. Other than studding the track it is as delivered from factory. In lose snow top-end is about 55-60, on hard pack or ice 65-70. Now all in all this is enough for old fart like me but last guy in buys the beer..... So getting a bit more would be nice if possible.

Armed Buzzard

Armed Buzzard, I was trailriding today and we stopped at a guys shop that works at sleds.
I mentioned my Frontier and the lack of top end and he said he would look at the clutching and gearing and should be able to make it work better, at least hopefully get a better trail cruising speed.
This guy knows how to tweek a sled, does good work and gets results.
I am taking it to his shop later this week, will post on the outcome.