I'm also southern bc, east koots, and yeah damn wet snow sometimes hey lol. Id think the 20/49 will cause the belts to eat more and it's not like the primary clutching is maxed so in my half educated opinion you'd get a similar outcome by lightening primary spring or add weight.
Last thing I feel in my 28+ years of clutching is gearing up just at very slight tad as this will do - will tame the low end a bit and only increase powder riding top track speed ( no trails) - I will report
We do get the heavy wet snow but not like the humidity of BC- but alot of bottomless fluff where the track speed does help
This slight gearing combo ( Math) worked well for the current Polaris axys and the old 2015 m8's --( I know different animals)- but worth a try for a quick few hours of gear swap and the price is well worth trying.
I can clutch easily around belt heat- lightening the primary only won't do and generally a bog .....
and then playing with the shallow helix these come with..
Small change so if it doesn't work- I will just mark it in the book & put it on the shelf along with the other tries that failed and others that didn't...
Only one way to find out and that is nut up and try.!!?
you can fit the 20T on a stock chain after 400 miles. fyi
Ya might be worth the try- it's right in the middle of the 2 ratios =2:5