As already stated just gear the sled up a bit.
My 2019 X-TX came with a 141 x 1.75 track, 21/41 gears, and 8 x 3" drivers and had no trouble easily breaking 100+++ mph
- 141 SW X-TX with 8 x 3" drivers and 21/41 gears tops out @ 103mph at a 1:1 shift ratio, 6% overdrive will give you 110mph[8800 rpm]
- 137" SW with 9 X 2.86" drivers and the same 21/41 gears tops out 110mph at a 1:1 ratio, 6% overdrive will give you 117mph[8800 rpm]
If you just change your x-tx gears to 22/41 with the same chain, 1:1 = 108mph and overdrive = 115mph[8800 rpm]....You probably need a new top gear anyway if the sled has any miles on it.