An idea posted by Bezman on a similar thread in case it helps someone
when searching on ideas of possible bike engined datto projects...

Its a 4 speed k40 toyota box from my visual knowledge not a t40
with 1st and 2nd removed or locked out and maybe 3rd kept for a hillclimb gear??

4th is direct drive like on datto boxes? and although this box is usually
behind a low power 3k series it might be fine as the hayabusa or bike box will take
most of the abuse as it distributes the stress.

Attach file:

---

  hayabusa toyota gbox.jpg (55.18 KB)