Motorcycle and ATV owners, this Red Line fuel system cleaner is serious stuff for keeping your ride running smoothly! Each 4oz bottle is concentrated with high-temp detergents that clean your entire fuel system - carburetors or fuel injectors, fuel lines, tank, intake valves, combustion chambers, even fouled plugs. It actually reduces octane demand too, which means you regain lost power and improve fuel economy. Just pour one bottle into your street bike, dirt bike, ATV, or personal watercraft for a quick clean-up. It works with both pump gas and race fuel, and it's compatible with pre-mixed or injected two-strokes. The formula lubricates the upper cylinder while it cleans deposits from intake valves and combustion chambers. Red Line has been making quality products since 1979, and their stuff really does perform better than what you'll find at the auto parts store. Having a 2-pack is perfect because you can do a treatment now and have another ready for your next maintenance cycle. If you've noticed your powersports vehicle running a bit rough, losing power, or getting worse gas mileage, this cleaner can often solve those issues without expensive mechanic visits. It's one of those maintenance products that actually makes a noticeable difference in how your machine runs. Your engine will thank you with smoother performance and better responsiveness!