Among the many improvements bestowed upon the 2013 CBR600RR is one that’s a little more difficult to spot until you know what you’re looking for: the new inverted 41mm Big Piston Fork (BPF). The giveaway is the distinctive fork cap with adjusters for compression and rebound (tension) damping settings. As you may remember, the CBR1000RR introduced the Big Piston Fork to the Honda lineup just last year, and while it is a 43mm inverted BPF, the design, operation and advantages all carry over to the new CBR600RR Big Piston Fork.