I had to replace both rear CV Boots on my Teryx 750 as I think lifters and snow tracks stretched them too much (changed angle?) I'm not a mechanic at all, but wanted to save $... Took me about an hour per boot, which seems pretty good. I've taken it out with the wheels on it a couple of times this fall and works like a charm. Snow is coming so tracks will be on soon, so that will be the real test.