Oil Reservoir Insert This part reshapes the oil reservoir opening back to round to shop leaks. Makes tightening and removing oil cap easier. Oil cap will no longer pop off reservoir threads with sleeve installed which eliminates a potential fire hazard and also brake failure. Designed to fit OEM oil caps and reservoirs Application Ski Doo 200811 XPs, 200308 REV, 2003 Older ZX, CK, F, S Chassis Arctic Cat MSeries and Crossfire Polaris Any with 1.75 Opening