SOHC.co.uk Forums > CB350/400

sheared cylinder head bolt hole - i dont know what it is called

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billdn:
having had some helicoils replaced i tried to assemble rocker box apart from some helicoils coming loose (i'll deal with that guy later!).
however one of the rocker box bolts would not tighten. taking the rocker box off (again) i found this (see pics). i think the phrase according to James May is "oh cock" although i used stronger! and before anyone says it, yes i did have the torque at the right setting!
i guess find someone who does alloy welding and have it rebuilt or any other ideas?

PatM:
Id buy this-     https://www.ebay.co.uk/itm/Honda-CB-400-4-Four-Engine-Cylinder-Head-and-Rocker-Cover-Restoration-Parts/172995768697?hash=item284759f179:g:mWoAAOSwX9FZJCVT

By the time you 'cock' around having it repaired- another cylinder head and then if you fancy, get yours done and build a spare engine?

Its what Id do...

Criminal, i know, but back in the day i dustbined a few 400/4 engines- but back in the day, the breakers were full of 'em...

billdn:
Not what I wanted to hear Colin! Obviously it's cost a bit to get this far, but my inner voice is telling me you're right. Bugger bugger bugger.

Tomb:
Will it drill and tap deeper and use a longer screw?

Trigger:
Not a easy repair to do, it needs welding up and then you need to take two points on the surface for a milling machine to grind it flat, before drilling and tapping. Can be done but, I would charge about £150 for this type of job. 

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