C15 Engine Bracket.

[Barnsey]

I checked and both bikes measure 155mm from the top of the crank case to the bottom of the rocker cover.

[rhyatt]

Try rotating the bracket on these 2 studs , that'll offset the upper end of the bracket to be fractionally off to 1 side of the top frame tube.

Both my bikes have their brackets ---
Vertical part away from the 2 rocker oil banjos , 1/2 nut under the bracket and full nut above the bracket.
Mind you there was no stud thread sticking out

[Barnsey]

Okay, I might have to use 4x half nuts, both underneath and on top. 

  BTW, what is the recommended torque for these? I tried 28 ft lbs, but the studs are slimmer than the main head studs, so I might be better off the back off the torque a little.   Online search suggests more like 10 ft lbs

[rhyatt]

Couldn't advise you with torque , sorry.
I just take down by feel.

As I said, there was no thread protruding on mine , maybe leave the washer out.

[Barnsey]

Okay, I'll suck and see, Thanks!

[limeyrob]

Check for a compression plate under the cylinder, should be visible as it would be about 1/8" thick.

[Tigerfeet]

Pg 165 of the Bacon book shows four half nuts used on head steady / rocker box join. From the top of the rockerbox it is washer, half nut, head steady, half nut.

Several other piccies in the book show the same arrangement.

Pg 47 shows that the P bracket around the frame goes at the seat end, with the flat link running forward.

[rhyatt]

https://draganfly.co.uk/shop/60762/head-steady-rocker-box-half-nut/#24-6040

24-6040 1/2 nut

and https://draganfly.co.uk/wp-content/uploads/content/frame_60.jpg

full nut above 2-429