So I just picked up an 87 250 Trail boss. It has a carb off of a 600 twin snowmobile. It does not perform very well, it won’t rev very high, and it pretty doggy even on low end. I think it could be improved with jetting, either that or I wonder if there is a good alternative that is not so expensive. Looks like original carbs run $100 and up. Any advice would be much appreciated. Thanks