Dirt Bike Radiators

I have a Yamaha YZ250 2001 .. what type of liquid that you put in the radiator??? Is fluid heater core or just somethingspecial dirtbikes?

Nothing special. You need to stick to whatever is already there, or do a good rinse. You can get unpleasant results if you mix the bad guys. Dexcool is good for the engines at high temperatures, such as a bicycle.

Use a mixture of half antifreeze (the kind that is safe for aluminum) and half distilled water.

I never heard about using something different for the liquid cooled dirtbikes, dirtbikes and all I got on the air were cooled.

When you find the heater on that thing .... Follow the instructions on the CAP

Try using marine.

its usually 50/50 antifreeze and water.