not ever having to put any in before and was wondering what the ratio of coolant to water is? thinking of giving the bike a nice big service and would like to know a couple of things before i go ahead and this is one, thanks

Use a 50/50 mix of distilled water and ethylene glycol antifreeze.

Just buy a jug premixed coolant 50/50 like tone said I use Prestone 50/50 I bought a jug of it at autozone and keep it in the garage for topping off or whenever I flush my system in my scoot.

cheers guys