Depends on the brand of Chain,, (#1 on the Andy Chain guy in the UK) but people do all kinds of things to make it work, On older bikes that rarely get ridden I use a local chain company and their 530 HD grade chain works great and lasts a long time. They make a regular 530 too and for lightweight bikes its fine. Its important to know your dimensions when sourcing a link, for example the above company supplys 530 in regular and HD (Heavy duty).
See:
http://www.bikebandit.com/aftermarket-parts/motorcycle-wheels-and-final-drive/chains/western-power-sports-530-standard-motorcycle-chain(Dealer price-warehouse cost is even cheaper)
Some turn down their sprockets and run a 520 O ring and that was the hot trick for a long time but the problem is heat treat on the sprockets and not for the timid.
But many seem to run the modern X ring chain and they have extensive benefits but with out the clearance issues when running the 530 width in X ring. I have a few boxs of them to try but have not been riding much lately so untested but a prelim clearance check shows them having a great deal of promise.
I would HIGHLY recommend ALWAYS carrying a spare master link. (many reasons) But the modern chain requires the pins to be smooshed into place so not easy to remove and replace is the only downside. (Plus a good tool to do it). Was just discussing chain options with another guy and while chains have their place,, I LOVE
the belt drives on primarys and final drives, I have a number of Buells and several Sporties and I just think its the greatest thing in the world,. Not really relevant here except for the primaries.. But thats my opinion
