Topic: CB550: building one good engine from two engines + new parts. Help me pick!

[bryanj]

Honing can be a bit harsh for a re-ring, Glaze busting is a better term. When i were a lad you could buy a "Glaze Buster" that looked like a Flap Wheel on a spindle

[Franky]

Slow progress...

How about these starter clutches? The one on the left, with the original looking + bolts is slightly loose, meaning it gives about 2 mm each direction when holding the base of it and twisting the top left and right. The one on the right, with the new looking unbracho bolts, is solid with no play. Should there be any? Which should I choose?

BTW: I don't use the electrical starter - it's not even on the bike. (I might use it on the doner bike later (the F), if I ever get time to build it).

[dave500]

morning franky,the right hand one might be better having been repaired maybe?

[Franky]

Hi Dave! I was thinking the same. But, I don't know, whether the part is supposed to give that little bit...

[dave500]

no it should have solid drive,no cush type damping in them.

[lucky]

This thread picks up where this left: http://forums.sohc4.net/index.php?topic=135314.msg1554207#msg1554207

I'm sure I need to replace the primary chain on my CB550 K3. It's loose as hell and has been dragging on the case. It's way loser than this: http://forums.sohc4.net/index.php?topic=95421.0

Now, what else should I replace or check out while I'm in there? I have been reading various threads and this is what I've found so far:

Replace:
- Primary chain
- Cam chain
- Oil seals

Check out:
- Damper rubbers (primary gear)
- Transmission gears
- Shifter forks

(The top I rebuilt about a year ago: newly surfaced top, newly cut valves and seat, a few new valves, new rubber pucks).

You do not surface a Honda cylinder head on Honda motorcycles.
You do NOT do any machining on Honda motorcycle valves. Just replace.
The valves have 3 angles.

Why would you take a 30 year old engine and replace the parts with 30 year old parts?
Timing and primary chains are available.

[Franky]

Hi Lucky

I think my english is a little imprecise sometimes (not my first language)... and it looks like you did not read the whole story :-)

No, I didn't machine any valves - bought new. Also got new primary and cam chain.
The cylnder head did get a machine-job, as it was a little bent/the surface rough.

I want to use some parts from the other old engine (the F one), since some parts you either can't get new or are prohibitely expensive!