Originally Posted by bullfrog_racer
Also what are the aluminum layshaft pulleys?
The middle pulleys where the both belts meet on each side of the spur. Several here have mentioned stripping them. I haven't had that problem but 3racing has aluminum pulleys that have plastic gear teeth (16,17,18) that can be interchanged thus lowering the internal drive (2.43, 2.29, 2.16). That may solve your gearing problem also. If you changed the ratio to 2.16, 50 pinion, 88 spur would put you right at 51. Also I know there are some spurs out there smaller than 88. Our LHS has some but can't remember the company name right now.