The stock tires were 200/55-17 and 140/75-17. The bike currently has 180/55-17 and 120/60-17's on it Dunlop D616's on it. It makes pretty good power, so I want something sticky. Custom low front fender means I have to stick to a 120/70-17 max. These will run on stock size Dymag wheels (17x3.5 front and 17x6 rear).

Looking at the Pirelli Diablo Rosso IV's and the Dunlop Sportmax Roadsmart IV's. Does anyone have any experience to share about either of these tires?