i bought aftermarket sprockets from Z1.... and i'm using a 630 chain...
i lube it about every 1k miles with honda o-ring chain lube
I've put 10,000 miles on my bike and the chain and sprockets still look like new! i make sure my chain is proper tightness and i just make sure its clean and lubed!
easy enough maints... and it should last! OH and on a side note I DO NOT under any circomstance do burn outs or wheelies!