@roadhammer1980
What’s the fuel mileage on the new 850?
The new 850 Patriot engine features a new 3-stage EVES system that, because of the new cylinder and water jacket layout, has allowed a simpler exhaust valve that provides a better seal in the exhaust port. The new arrangement seals the exhaust subports better while also reducing the dead volume between the cylinder wall and the exhaust subport valve. This provides a significant improvement in low speed fuel and air trapping efficiency. The increase in trapping efficiency not only increases low speed torque and throttle response, but also fuel economy.
—Marty Sampson (Snowmobile Product Manager, Polaris Snowmobiles)