Great job Marcus what you are doing is great!
Marcus and I have been going back and forth about gearing and we both have been testing all summer. I tested about 15 extremely different ratio combinations, from very short to very long, all kinds of splits between 1st and 2nd too.
I found a good durability of bearings (i mean at least a main or qual day) with the OFNA Clutchbell, but only if you stack 4 front bearings on top of each other. I used Avid ceramic bearings. With the optional straight cut ring and pinion I had to use 14t clutchbell pinion for first and 17 or 18 for second gear. That wasn't great because it forced me to bring the motor too much towards the centerline and I had to remove the rear brake disk. It was rubbing against the flywheel.
I really think that bigger spurs and/or a taller ring/pinion is the way to go!
Last edited by Joe Kimble; 02-06-2014 at 01:15 PM.