Does anyone have any idea what the manual is pointing out with reference the the headstock bearings on page 21 of the TT-F3 manual? theres some measurements in the text but thats all the clues are there amoung the jap writting.

If your manuals the same as mine, 21 has a picture of the steering stem and then the bearings.

Picture 1 (top right) says cut off the ignition lock holder

The second picture (bearings and stuff)

Steering Dust Seal, cut off the parts with the arrows pointing to them

The bottom of that page gives information on the steering dampner.

I see, so going by that you cut off the outer part of the seal? seems odd, whats the idea behind that then?