I take it the places to drill are the outlet of part No 1, Yes
and the elbow union part No 5.Yes
what size is the outlet of the resevoir and the 90 deg union as standard.On your bike they are probably like that as standard as they were changed
are we talking about drilling out a lot of material.No
and how did you manage to drill the 90 deg elbow union around the bend, or is the middle of the elbow larger in internal diameter.It is easy, just be careful though to not push the drill bit too far
i think i also read somewhere that you drill the mounting holes out in the master cylinder to allow it to be mounted at a steeper angle reducing air ingress and self bleeding. anyone else heard this.
Heard of it but never did it, i fitted a bleed banjo bolt at the front of the M/C to aid bleeding