Where the 1700 seems to have pretty big jumps between gears (especially 1st to 2nd), has anybody heard of someone changing sprocket sizes to tighten up gears on these bikes? I know it's a common practice on other bikes. Seems to me that would make a big difference on the feel of the 1700 especially at slower speeds. Are there even any other sprockets offered by aftermarket companies? A larger rear sprocket or smaller front sprocket?