You should be able to use any timing set (new) to determine the slop since stock is stock regardless of who makes it (waiting for the arguments here !!)

Oversize chains ?!?!?! All chains are the same - its the top sprocket that's oversize. Which allows you to replace worn chains with any "off the shelf" double roller chain.

A top quality and inexpensive oversize set is available from JP Performance out of Australia. Available through any Motorstate distributor. p/n jpp5606t-lb5

http://www.motorstate.com/site/?ct=131#goto74170