polaris sleds get yellowstone ok
Amsnow
Dec. 29 -- The U.S. government has certified two Polaris 4-stroke sleds to be used this winter in Yellowstone National Park. The FS IQ Touring and FS Classic, which use the new Polaris 4-stroke engine, have been certified as Best Available Technology and therefore can be used this season in the park. The liquid-cooled 4-strokes exceed EPA emission standards set for 2012. Other snowmobile manufacturers also have sleds approved for use in the park this season.