Good tips. I will switch the fuel line over during the long winter.
A little update, after dealing with a bad stator at about 30 minutes ride time, I finally got the ski mostly dialed in. Initially, I had a terrible lean hesitation from idle to 1/4 where the ski would actually die if I went wot from idle. I went out to about two and a half turns out on the low screw (120 pilot) and got that mostly dialed out. I upped my idle so that the ski will not stall off throttle and that helped too. I cannot seem to source pilot jets bigger than 120 for the SBN carbs. Anyone know if they make them?
I am still getting fuel dribbling down the carb from the venturi after a quick wot cut running on my stand. Pop off tested at 32 to 34 psi each carb with 2.0 n/s and gold springs. I ordered a set of 1.8 n/s and black springs to give that a go. I am also going to double up on the check valve discs as I was reading in the Mikuni tuning manual that can help with excess pressure or leaking of some sort. I don't quite understand what those check valves do.
Now that I have 2 hours on the engine, I backed my oil ratio down to 40:1 using skicraft.
I am trying to get this engine dialed in so I can grab a handful of throttle right from idle and have it pull hard. I am not quite there but getting close. Its very ride-able now. Looking forward to taking it out after work today to get more tray time.
Finally got the engine to pull hard from idle to WOT. I backed my N/S down to a 1.8 with a black spring which netted me about 26 psi pop off. I still need to tune the needles and lean it out some but it pulls nice with no hesitation now! I doubled up on the check valves in the carbs but still have fuel dribbling out the venturi after a WOT cut. It runs good so I guess it is not a concern. Just kind of wondering what actually causes this.
Also, I am officially titled and registered in Michigan!