$170, seems interesting... John, you should get this put on when you do your cam mod.

Adjust the power band exactly where you want it for the most efficient use of camshaft, with a adjustable cam gear. By advancing or retarding the cam timing, you can shift the power band up or down in the rev range. Advance to move the power down lower, retard to move the power up higher. The main gear is a modified, new factory unit to insure perfect belt fitment

http://www.greedspeed.com/products/p...%201.8t&cat=11