If your bike is running hot, then you're not getting peak performance. Reducing heat in the closed loop cooling system helps to maintain your bike's optimum horsepower. Liquid Performance has the solution - LP High Performance Street Bike Coolant & Antifreeze. Tested and dyno rated the #1 coolant on the market. Propylene glycol based, phosphate-free, virtually non-toxic and biodegradable. 64 ounce bottle. Note: Boiling point protection up to 260°F (126.6°C); freezing point protection down to -30°F (-34°C).