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Teds new project a CB500 K1 mostly version 0.5 circa 1972.

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Bryanj:
I have a vage recollection of early seals being a different thickness from later ones but not sure if it was just 750 or which way. I think there was a service bulletin about it

McCabe-Thiele (Ted):

--- Quote from: Johnny4428 on February 24, 2023, 05:45:56 PM ---Wonder if it’s bad fitting Ted? Cant see that it would shift touching against stanchion. Assuming they are correct seals for the job.
Maybe an attempt to get worn seals to seal?

--- End quote ---

They were new seals of the correct size for a 500  - they shifted when I was dismantling the forks -there was a substatntial gap 2-3 mm between the circlip in the groove when they were fitted fully down against the shoulder earlier in the year.

Bryan might be onto something about an alternative seal size being fitted.

Johnny4428:
Sorry Ted, certainly wasn’t suggesting you had fitted badly! Thought maybe there had been a previous hammer wielding monkey at it. 🤣🤣

Oddjob:
According to parts book the seal should be 35 x 48 x 11, and from what has already told me that's what's printed on the seal. I do seem to recall some seals having a metal spacing washer fitted under the seal, snug fit inside the slider but bore too big for it to ever touch the stanchion. Maybe that's what this needs. After checking my spare sliders I can confirm the shelf the seal sits on is 14.5mm from bottom of shelf to circlip recess, so if the seal is only 11mm that's a 3.5mm gap allowing the seal to move up and down. Doesn't seem a good idea to allow it to do that.

McCabe-Thiele (Ted):

--- Quote from: Oddjob on February 24, 2023, 06:06:22 PM ---According to parts book the seal should be 35 x 48 x 11, and from what has already told me that's what's printed on the seal. I do seem to recall some seals having a metal spacing washer fitted under the seal, snug fit inside the slider but bore too big for it to ever touch the stanchion. Maybe that's what this needs. After checking my spare sliders I can confirm the shelf the seal sits on is 14.5mm from bottom of shelf to circlip recess, so if the seal is only 11mm that's a 3.5mm gap allowing the seal to move up and down. Doesn't seem a good idea to allow it to do that.

--- End quote ---

I agree Ken that is the seal I have 35 x 48 x 11 - the old seal was binned so I can't compare it now but 100% certain there were was no spacer fitted.

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