Anyone playing with tuning one of these?

We got one for the wife when I got my Outlander this past spring, good promotion going from Can AM. She liked it at first but then we realized it could use some tweaking, had trouble on some hills at the riding park we ride at in PA.
Hence, I couldn't resist to start playing and have so far tuned the clutch so it rev's higher and more freely to use the HP from this 4-valve head, instead of lugging so low from the factory setup.
Added +2 wheel spacers to the front with the set of Works Performance AT-steeler dual rate shocks (that I had from a previous 250 race quad), and changed the rear 20" OEM tires to a 22", installed a Uni-Filter. This thing gets up and scoots now, will climb hills effortlessly that it previously would wimper and groan at.

I know there are exhaust available, but not ready to pay the big $$$ just yet.

Any other experiences or recommendations out there? Would gladly trade some tech knowledge.