you should have a petcock valve on the bottom of the radiator. beware. do not use automobile antifreeze in a motorcycle. it contains silicone that will wear your water pump. make sure to use motorcycle antifreeze or silicone free automotive. Try this link out. It's got pictures and directions to help you with the coolant change. http://users.zoominternet.net/~capronem/Coolant%20change.htm
how to change antifreeze in vauxhall vectra B
How do you change the antifreeze in a 2004 Eddie Baurer ford Expedition.
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To change the antifreeze on a Mercedes, locate the drain plug on the bottom of the radiator. Drain the fluid into a pan and refill it.
The antifreeze provides corrosion protection and gradually becomes acidic as the corrosion protection declines
The corrosion protection package in the antifreeze does " wear out " so if you do not change the antifreeze / preferably distilled water mix the coolant mix will become acidic and not provide the corrosion protection that is required
Any antifreeze that doesn't contain nitrates or phosphates (which can corrode the metal and break down rubber seals in your system) can be used. Many regular automotive brands will state if their product is safe for motorcycles. If it doesn't, don't use it. You can also play it safe and get motorcycle antifreeze at your local bike shop. There are a few exceptions with some of the big bucks foreign bikes. Follow your owners manual to always be sure.
Standard antifreeze should be changed every two years. Long life antifreeze needs changing every five years.
Adding antifreeze to your radiator is a physical change because the antifreeze retains its chemical composition and properties when mixed with the water in the radiator. It does not undergo a chemical reaction to form a new substance.
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To change the antifreeze on a 2003 Alero once the car cools remove that radiator pressure cap. Pour in a gallon of pre mixed coolant.