We've cut a few down to race on the ice. -1, -1.75, -2, -2.25, and then roughly 6-8inches cut off too.
We've done a few on honda's as well as hand built 3 aluminum swingarms to different lengths.
Here is a studded quad (-2.25) and a rubber quad (-7ish)



This is what happened to our first one when we got lazy and didn't want to change out the -1 swingarm for another stock one in the summer.

We never built it to last jumping but they have held up plenty fine for tt and ice racing.