overshift bearing?

Hey guys,

I have talked to a few local racers and I am going to attempt to put my bike on the strip,AGAIN!!(damn economy last year!!)
They all have recommended to install an overshift bearing to prevent tranny damage. I looked on kzzone and seen one,but have no idea where to install it. Could you racers please help me out?
It would be greatly appreciated.
I know I have written about racing it in a previous post,but that was not with me on it. A buddy of mine took it down the track for me. He's a good rider,but not to mechanically inclined,lol:silly:
Again thanks in advance,
Mike.

P.s on the other hand,what air shifter would be best to use? They have a street bike class at my local track, street legal all the way,no slick. That's the class i want to run due to the fact that I ride alot on the street,plus it will(hope) to give them sport bike guys to think about when they line up against me!!!(bracket racing!!:lol: :lol: )

im not good at drawing pictures on computer cant find a picture,but it goes under the "trapdoor" where your shifter linkage/claw is located on the shaft for shifter

ok plummen.
Could u get a pic maybe? Is mod this really neccesary or just a waste of time? I don't want to tear my tranny up.
Thanks.