SOHC.co.uk Forums > CB500/550

Shift shaft tiny lateral movement?

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Oddjob:
I've got some bare cases around, I'll take a pic, seem to recall it's right at the back. I'll measure the depth of the hole and see if I can find a seal (just removed 2 from some old cases but threw them in the bin, maybe a little dig around in the bin will find one) if I can find it I'll measure the seal and we can see what sort of clearance we have before it's blocked.

alexdecker:

--- Quote from: JezzaPeach on August 02, 2022, 03:27:31 PM ---PS any idea how far back the oil hole is? then I can judge it as I can recall the thickness of the seal.

--- End quote ---

Here is an image from Matthews video, showing the seat for the seal and the oil passage behind that.

alexdecker:

--- Quote from: Oddjob on August 01, 2022, 07:07:11 PM ---The O-Ring is a thicker chain than standard so check where the rivet pins go as it goes around the front sprocket, there are some reports of them gouging a track in the crankcase, hitting the chain guard that you're after and on the 500 breaking the clutch push rod. See if you can spot any shiny areas where it might be touching.

--- End quote ---

Holy s*** am I glad you caught that. Just went down to the bike and looked. The chain has eaten into the case, and already started eating into the new seal I put in during the rebuild. Don’t know how I could’ve missed this. It took a pretty big chunk of the piece of metal right below the seal (hard to see in the image though).

Two questions: What is the proper chain I need to put in? And also, the seal that has been eaten into is the transmission seal - I can’t replace that without taking cases apart, right?

Bryanj:
That is a blanking plug and will be fine as is.
You need a 530 HD chain NON O RING OR X RING

JezzaPeach:
Alex, that is a very clear and helpful picture thank you.
My problem with the o-ring chain exactly the same. New push rod from Trigger, seals from Julie, and chain from DSS, although they need to know the number of links as they initially sent one too long thinking I was going to remove the extra links.

Attached is my 500 showing the ‘old’ push rod and seal using the 550 blanking plug position.
If Oddjob or anyone has a pic similar to your case but of a 500 showing if the oil feed hole is there or not that would be verrrrry useful.
One thing I have spotted is a pic on eBay of a case with the seal flush with the case……. :o

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