http://www.ebay.co.uk/itm/ACF-50-Mot...wAAOSwdGFYrS07
A liberal coating of the above on metal (not the disks) leaves a layer that staves off corrosion. It's well worth the cost and a massive bottle like the one I linked lasts a very long time.
It's the latest emissions/safety rules from Brussels. Bikes that size require combined brakes or ABS. Lot's of Chinese bikes are still Euro 3 and being sold under a rule that allows a certain % of older Euro 3 bikes to be sold. I've googled it it is Euro 4 with combined brakes.
If the speedo is cable driven you could probably make the KPH in to MPH with an old adaptor (http://www.ebay.co.uk/itm/Motorcycle...8AAOSwYIxX9L1W).
Or just do it the ghetto way and put easy to see stickers on the clock face at 30/40/60/70