Originally Posted by JetMD

If you go to: http://www.mugenseiki.com/menueefi.htm
and click on What's New on the left menu, scroll down a little and you will see this:
New Product Information 4/10/2008

Optional parts for MTX4R
1st. Spur Gear 58T, 59T, 60T (T0279, T0280, T0281)
2nd. Spur Gear 52T, 53T, 54T (T0282, T0283, T0284)



These new spur gears has same shape (0.8 module) as previous one,
but it became more stronger to change the material.