Bringing 1983 / 2005 back to live

[Sgt.Pinback]

Thank you very much. That realy sets me back.

Found this cylinder in my inventories... I think its a KO cylinder? Please check nevertheless.

[Sgt.Pinback]

And this head. No idea where this belongs to.

[Sgt.Pinback]

Thanks for input.

here are two better pics of the head the bike came with. Comments ?

[Sgt.Pinback]

Pic of the cam chain roller. The one on the right, completely worn. Compare to a newer one on the left.

The chain itself is heavily lenghened and already worked its way into the cylinder. Will replace anything here.


My spare K0 cylinder (+0,25) will get new pistons and rings.

[Sgt.Pinback]

Primary chains to be repalced as well.

Gearbox, forks, drum looks OK.

Clutch basket the KO type.

[Sgt.Pinback]

Good news: seems to have the narrow tripple tree.

[Sgt.Pinback]

BTW: Are SC cylinder and head been painted?

[Steve Swan]

BTW: Are SC cylinder and head been painted?

yes, painted.

[Sgt.Pinback]

Thank you, Steve.
 
That head the bike came with looks to be a KO head without that additional boss. So I may keep this one. Can you confirm?

Regarding the cases I would assume, they are not painted.

[Sgt.Pinback]

Uli
 Is the rocker cover original.

Here it is.

I think it is what you call the "type B" version:

http://cb750sandcastonly.com/smf_forum/index.php/topic,408.0.html

[Steve Swan]

Thank you, Steve.
 
That head the bike came with looks to be a KO head without that additional boss. So I may keep this one. Can you confirm?

Regarding the cases I would assume, they are not painted.

KP will need to give his opinion on that head.  Beyond sandcast heads, i have not seen the different later variations he has.    Chris Rushton would also know, would be nice to hear from him.

The cases are painted.  if you go to Mark's #97 restoration page, you'll find what paint he used on the cases/head/cyl.  the small rectangular cam chain cover used a different color paint.  i have those 2 different paints up at my shop, as i recall, both by Duplicolor.

[kp]

The head you picture Uli is a later K0 head as described in the main SOOC website under the topic technical. This head is fine for your purposes as are your spare cylinder set. I really don't know when the changes to the heads was made but given there were around 20000 made anyone can have a guess The cut off dates for one part to a newer version is not my cup of tea. This is where Mr Rushton excels as he has documented the changes of so many items over the years. I believe the cylinders were changed from Sandcast to die cast manufacturing somewhere in the 14000 mark but that's just something I thought was the case but may not be Either way the extra head bolt boss was cast before they actually drilled the hole through the boss so anything with a boss with and without a hole was well past Sandcast production

[Sgt.Pinback]

Thank you for your info, gentleman.

Kerry, any comments on the valve cover?

And: were the SC  cylinder and heads sandcasted?

[Sgt.Pinback]

Here is a pic of the sandblasted frame.

That gusset looks realy roughly weldet.

No idea what those holes in the gusstes are made for.  I will have to have them closed?

[Sgt.Pinback]

Lower fork clamb with "4M".
So doubtful again that the letter stands for the month.

Upper tripple tree has a stamp as well, but I only can identify "4"