I just bought my gs500 and i didn't get an owners manual. which direction is on, prime and res? I have the thing set pointing down.
down...on
left....reserve
up...prime
Look real close it should be on the petcock.
In case it will help you remember, see this post (http://www.gstwins.com/forum/viewtopic.php?p=160172#160172) for annotated photos.