756 - 739 = 17 (% Better turning). No bike turns good on 739's. Why do they even put them on stock? 06 CRF450R now come with 756s. '06 CRF450 comes w/742 front - 756 rear. The 742 is almost as bad as the 739. I run the 756RR front and it works excellent on most surfaces. The 742 goes back on the bike when I sell.