If you don't space the sprockets out you run the risk of hitting the tire with the chain in left handers.
As the tire experiences side force, it will pull the tread toward the chain and possibly rub.
Keep a very close eye on it.
'06 R12GSA/Hack & '10 R12GSA
An armed society is a polite society. Manners are good when one may have to back up his acts with his life. Robert A. Heinlein