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  1. 07 r1 520 conversion with lighter sprockets?

    07-08 R1 Mechanical Help
    Hello, there's a lot of thread about it but I just want to be sure, I have a 2007 R1 with a 190/55r17 tire instead of a stock 190/50r17. I want to have more bottom end, I don't really care about top speed but I also don't want to go 60mph in 6th at 8000rpm because I will use the bike to commute...