i dont think you can remove the gear from the starter, usualy they are hard pressed 
iam unsure but i think a RB starter works btw you can very very easy adapt a Rb20 tranny on your FJ
from what i read on FJ20.com you just have to slot one hole 
You mean the Flywheel? It should be one piece...
Yes I read the RB gearbox can be easily mounted on the FJ, but I am not running that kind of high hps that i need a stronger gearbox.
The starter is fine, it is the part that the starter sets in motion that is damaged.
stronger?LOL its just a fucking C-tranny with a Rb bell 
stronger?LOL its just a fucking C-tranny with a Rb bell
Explain please..
whats a C tranny? And why do i read everywhere it is stronger then?
The letters show which series of tranny you have
for example
FS5W71B from a old 240z
FS5W71C from a old 240sx (US s13)
F4W71B four speed, -> 240Z-260Z-280Z 71.5-?
F5W71B five speed, -> 280Z to 79 (possibly, not certain.)
FS5W71B, five speed, -> 280ZX 79-83 non-turbo
FS5W71C, five speed, redesigned tailhousing, shifter, 62mm countershaft
bearing upgrade, -> 84-86.5 Z31 non-turbo, S13 84-86.5 with five
speed.
FS5W71C, five speed, double cone steel syncros on second gear, 1mm
wider gear teeth, all previous upgrades carried through, -> '87 and
newer S13, S14, Xterra, maybe others.
a RB20 uses technicaly just a s13 tranny with a RB bell and its just stronger than a B-series tranny 
S13 84-86.5
Should be S12? 
its only stronger cause you maybe have a B-tranny like all early and some Mid production MkI have 
there is even a Howot on Club-s12 which explain alot of things
