Chain and sprocket.

[JoeRock]

alternatively one metal mallet (flat end) or an anvil-like surface, a ball-peen hammer and a set of mole grips will do the job nicely!

[Val]

The OE spec chain is probably DID ZVM (it is on my thou anyway)

150 quid for DID ZVM chain is probably about right.

Most of the DID 'gold' chain you see on e-bay etc is not ZVM spec.

I'm happy with riveted chain.  If you buy the tool you'll use it again and again anyway.

http://www.didchain.com/chainSpecs.html

http://www.didchain.com/chainTools.html

The reason I've bought Tsubaki chain was DID tool was too expensive. The tool I've used for Tsubaki chain was only £25 and bear with me is a good quality tool exactly the same Tsubaki use in their chain riveting installation video:

http://www.demon-tweeks.co.uk/motorcycle...eting-vice