drew562
Active VIP Member
If you have a skidoo, spitting belts, it is not fixable. Imo. Been down that road on multiple sleds. I had a free ride that did 16 belts one year. Turbo Al Clutch, and geared it. Mad Motors sports Leduc clutched and geared it. Specialty motorsports Edmonton clutched and geared it. And Martins spent half a season on it. 75 km belts. We’re good ones. It was on warranty so the fix for skidoo was to sell me belts for 100 each lol. Oh, and I even put a PA 85 Polaris clutch on it. Lightweight clutch took out the crank.Clutching is always first, especially reading previous comments how the sheaves are looking. Also taking into account Ski Doo's previous track record of poor calibration. Taking some time to look @ ramp profile & weight, spring rates in the drive & driven. Assuming the typical 40* in the secondary you can tell quickly how the calibration will work or not.
The 146 will spin quicker, so a little higher gear would still have the belt in the optimal position. Sharing equal sheave contact area between both clutches in a high load condition. I've always thought with the factory wobble in the fixed half of the primary it would be interesting to change the gear ratio up & down slightly from optimal. While shooting that sheave temperature with a heat gun. With belt problem starting in 2017 G4 & monitoring the sheave temp, that drive fixed half was always noticeably warmer, not hot as the calibration & set up improved. The wobble might like a greater sheave contact area than the driven & cool down.......that would support the lower ratio theory......if that is true.
You can calculate the gear ratio, including driver size to see if the ratio is close. It won't matter if the clutch calibration is bad. Gearing down is just a banded @ that point, heat is being generated in the clutches.
Just like the weight of track, a 174 T3 is probably near twice the weight of that wee 146. We have 174 T3 tracks in G4's with zero issue.