If you’re working on a carbed Ski-Doo and are experiencing fuel flow issues, do not forget about the little fuel filters right in the inlet where the fuel hose attaches to the carb! Ski-Doo removed these from the ZX models starting in 2000, so they’re in most everything pre-2000 and some non-ZX models after 2000. These little filters can and do get restricted, and too many shops forget about them.