SOHC.co.uk Forums > CB500/550

Partially Restored 74 CB550

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K2-K6:
As above, it's no real problem, but dont whatever you do turn the crankshaft with the camchain down in there bunched up  :o

McCabe-Thiele (Ted):

--- Quote from: davidcumbria on April 28, 2023, 08:20:52 AM ---Thinking ahead to the rebuild what’s the deal with cam chain ? I plan to to put crankcases together with engine upside down to avoid the difficulties with selector forks and bearing pins. Will the cam chain stay on the crankshaft teeth during the rebuild or do I have to find a way to keep it tensioned, including refitting the barrels,  so it doesn’t drop off the crank and get all messed up?

--- End quote ---

When I was rebuilding my 400 I made a simple wooden support made from offcuts to hold the top case upside down. The first picture was taken before I added an extra shaft of wood. The case was supported either side od the face where the studs fit - I used a short length of left over plastic drain pipe to act like the camshaft as it rested on the head studs.

Its lighter/easier  to fit the engine into the frame before you fit the block & head.


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casings before stripping paint by Macabe Thiele, on Flickr

.Top casing bolts by Macabe Thiele, on Flickr
51215030361_81a76ec82e_o by Macabe Thiele, on Flickr

51387518187_e6193f7eeb_o by Macabe Thiele, on Flickr
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51388278441_de81522bcd_o by Macabe Thiele, on Flickr

Oddjob:
I just used to drop the chain down onto the crank and fish it out when needed, as the chain is oily right out of the box, having it exposed just allows dust and crap to stick to it, keep it hidden and move it when you need to and not otherwise.

Teds engine BTW never ran on number 1 cylinder very well, that's because he wrote the number 1 backwards in relation to the others, rookie mistake.  ;D ;D ;D

McCabe-Thiele (Ted):
I blame Grahame as 1 & 4 were written on one way 2 & 3 the other when he honed the pistons or whatever magic is done after a rebore - took me ages to be sure I had not got two pistons back to front.

Johnny4428:
Either forward or backward thinking?🤪🤪

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