Sprockets Need help on deciding what size cog for my bikes

[rando24]

So I have a 66cc 2 stroke and a 49cc 4 stroke, i haven't got the cogs that came with the kits so if anyone can tell me what size as in number of teeth for each one, for both of them i want good speed but also to be able to climb hills relativity easily.

thanks

 

[Samdallas214]

http://sickbikeparts.com/catalog/index.php

will have everything you need and can answer your questions