How do you change the antifreeze in a trx 450r?

To change the antifreeze in a Honda TRX 450R, first ensure the engine is cool and then locate the radiator drain plug at the bottom of the radiator. Place a drain pan underneath, remove the drain plug, and let the old antifreeze completely drain out. Once drained, replace the drain plug, and then fill the radiator with a fresh mixture of antifreeze and water, usually in a 50/50 ratio. Finally, run the engine briefly to circulate the new coolant and check for any leaks.