Since you´ve owned 3 C50s, can you tell me if there´s a performance difference with the 09 c50 vs pre 09? I have an 05 and am wondering if you notice a performance difference with the 09 having 2 spark plugs per cylinder. I also heard the 09 has a slightly longer 5th gear. Is that true? You´re the only guy I know who´s owned all three generations of this bike.