Like coyote said, you don't want anything that says "energy conserving" or that has friction modifiers in it.
You don't have to pass your wallet through your nose for "special " motorcycle oil, which is probably plain oil without friction additives in it and the word "motorcycle" printed on the side.
This guy uses Mobil 1 red cap and Rotella:
Honda Motorcycle - Anyone using full synthetic oil in their Goldwing