Trouble with 2 chains to 1 sprocket is the 2nd chain wears much faster,never put a new chain on old sprockets or old chain on new sprockets. As far as replacement I'll go with a std 530 chain and cheap Honda sprockets and pocket the change.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!