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Nothing wrong with keeping the stock 530 setup and swapping sprockets to smaller front and larger rear except the aftermarket rear sprockets are aluminum and the stock chain is poor quality. Aluminum sprockets wear quicker than steel.
For longevity you can't beat a quality X ring chain and steel sprockets. I use a rear 40 tooth sprocket from a Taotao ATA250D, JTF259.12 front, and a DID 428 X ring chain. The 12 tooth front requires using circlips and making a spacer from an old 428 sprocket because a stock retainer is too big.
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