Oil Pump Block-off Kit Sea-Doo 587/657 /657X /717 /Yamaha 800/1100 /1200 /Kawasaki 900/1100 /Polaris/Tigershark 900/1000 Block off kits are ONLY for carbureted applications. It is not possible to pre-mix a fuel injected ski, as the injectors will clog. Fits: Sea-Doo 587, 657/X, 717, Yamaha 800,1100, 1200(all), Kawasaki 900, 1100, Polaris (all), Tigershark 900, 1000.