| If you wanted to be trick, go to a gold 520 erv as your buying a rear sprocket just a few more pence for a front aswell.
The 748 runs on a 520.......and so does most race bikes.
It was explained to me as, think about a match stick. try to break it. now cut it in half and try to break it again, itll be harder to achieve.
Search on this topic as weve been here before. | 
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