Actually it's 24 mm.  15/16 works just fine.
On Saturday, November 11, 2006, at 10:00 PM, Automatic digest processor
wrote:

> remove horn button, then big 21?mm nut and pull strg wheel off.
> (oh, make sure your front wheels are straight and u mark TDC otherwise
> when
> you remount strg wheel it'll be crooked)
>