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1967 CB450K0 Black Bomber Rebuild - By Royhall
K2-K6:
Very good rebuild thread Roy.
Impressed with how flat and perfectly sealed that original head gasket face was in the first picture above.
royhall:
That face required no work whatsoever except a good clean, it was about the only thing on the head that was okay. I think it may be due to a fairly thick gasket, a small area, and eight large studs holding it down. I will be well pleased if I have got a good a seal again.
Laverda Dave:
Fantastic progress Roy and I like your idea of using the grub screws, practical and a worry free mod when you are giving the engine the beans.
That is one tall engine! The Laverda triple engine is very tall and is nicknamed 'the block of flats', the Honda engine is just as tall! A Jota is also known as the world's fastest lorry due to its height and weight!
Keep posting updates.
royhall:
Just a couple of extra shots of the cylinder head before I move on.
Note that the head hold down nuts are just normal full nuts with steel washers except for the two on the right hand side. These two are domed nuts with copper sealing washers as the two right hand drillings are used as pressurised oil supply tubes to supply the cams with lubrication.
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I don't have much time today so I shall continue another day. Cheers.
MrDavo:
I worried after reading the last post, I can’t check right now (I’m up a French Alp) but I’m pretty sure that my CL450 has 8 of the domed nuts holding the head down.
The CMS online parts book shows, like your bike, two domed nuts and six plain, quite why and when my bike got eight domed ones is lost in the mists of time, however as long as it has the right nuts on the two oil feed studs, which it has, as long as the other six aren’t bottomed out (hard to check) there shouldn’t be a problem.
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