Newest idea, I hate bleeding the rear brake since the high point of the system is the rear master cylinder. So I want to put a bleeder there. The problem is the airbox won’t allow a standard bleeder banjo. So I’m going to try this. I figure if I groove the threads for flow I can put a sealing washer on top and sneak in a cut off allen wrench to bleed when necessary. Titanium? Yup. Overkill? Well yeah! Would work better with the lower profile of a steel bleeder.

that will not work

Why?

On bike. Does work but airbox still too close to open. Going to replace top bolt with small hex head so I can access from side.

you will bleed as far as master cylinder but you will still  need to bleed air  from from rear caliper,this best done by holding caliper higher than master cylinder.