Big bore cylinders, swingarms (round carrier) stock and extended lengths - link and no link, a arms +2 & long travel, more rim selections - hypers and other bead locks front and rear. Aftermarket clutch baskets. Better chain sliders for the swingarm (ones made for aftermaeket swingarms)

Now I know most of this stuff was produced in the past but it is not made anymore, making finding these items near impossible.

All those have been made at one point or another.