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CB 500 resurrection

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gary123:
Oddjob, thanks for the input. Ill check things out tomorrow as Im getting my various shafts mixed up in my head.
There seem to be different names for the same thing so Ill do some research.
Everything in that picture came out of the 500 cases.

Oddjob:
Does the needle roller housing on the mainshaft (clutch) have a hole in the centre of it? It needs to as that's where the pushrod goes through. Someone has clearly been mucking around inside as it looks to be a bit of a 500 and a bit of a 550. Which could be a problem as they used different gears for the different models and you can't mix and match.

In your pic, the top shaft is the countershaft or where the front chain sprocket fits.

The next one down is the kickstart shaft.

Then the primary shaft with the primary gear next to the bearing. That's the one with different numbers of teeth for the 2 models.
Front shaft is the mainshaft or clutch shaft and next to that is the primary drive hub. That has a large gear attached that the starter motor uses to spin the motor over.

IIRC the needle rollers uses 2 different methods to hold the needles. The countershaft one uses a cage which holds the needles in place, you can remove it from the housing and they'll stay in place, the mainshaft uses a similar cage BUT the needles are loose and tend to fall out as soon as you remove it from the shaft. That's most likely where one has been lost. I may have a spare loose needle roller around if you need it.

gary123:
Some good info there.
Yes clutch shaft has a hole right through.
Primary drive gear has 23 teeth.
I have spare needle rollers.
Ill go through everything tomorrow I have to go play pool and drink Guinness now. :) :) :) :)

gary123:
So. The cases have now been acid dipped, painted and baked and Ive started to read assembly instructions.
I got as far as the selector drum stop screw and Im confused. There seem to be two kinds. All I have is a screw with o ring and tab washer no spring or ball but it seems some engines are like that.
Does anyone know if this is correct I think there should at least be a cap of some kind.
Also if you have time could you explain the purpose of said stop screw. (idiots guide please).

Oddjob:
The very early 500s had a small ball bearing with a spring, on the shift drum there is an indent and the ball bearing would go into it and help with neutral selection. However there were some problems with it and Honda redesigned it and issued a recall for all the early ones so they were changed to the later design. The later type has the same bolt but instead of the ball bearing and spring there is a collar which fit's over the shaft at the base of the bolt. The selection mechanism inside the clutch case was also changed.

All the K1 500s have the newer design and most of the K0s after a certain engine number also have the newer design.

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