Lots of progress! Got a solid few days of work in over the 4th of July holiday and was actually able to ride it around the neighborhood! It's all coming back apart again now so I can make a wiring harness, mounts for the lights and such, and finish off some detail stuff before painting the frame. The exhaust, while probably not the best for performance, sounds great and surprisingly is not too loud. Carbs obviously need some jetting work. I have yet to find a good explanation for why the stock carbs have a primary and secondary main jet, which makes it harder to deal with tuning. I will probably start with the ubiquitous 90/120 recommendation and see where it puts me, but if anyone has an explanation of the carbs I'd love to hear it. Side note: while the spring rates are about right on the snowmobile shocks....the damping is really stiff. At least at 10 mph it is stiff. Remains to be seen what happens when speed and hard impacts are added to the mix.