SOHC.co.uk Forums > CB500/550
Item 8 in this picture - tongued washer?
McCabe-Thiele (Ted):
As it was missing on my 500 I am fitting the chain guard that bolts inside the left side chain case cover.
Two M6 bolts hold the protector in place, one has a spring washer, the other has a tongued washer part number 90532-323-000. that is shown as no longer available.
Is it okay to use a spring washer instead or is the tongued washer an essential locking tab?
Do I need to fabricate a lock washer for this location?
.left-crankcase-cover_bigma000082e11_91d1 by Macabe Thiele, on Flickr
K2-K6:
"Is it okay to use a spring washer instead or is the tongued washer an essential locking tab?"
It looks like the spring washer is on a bolt isolated from the chain run, with the tabbed bolt having extra security being in vicinity of the chain and sprocket rotation ?
I can't tell fully from the diag, but that would make sense for the type of fixing security they provide.
McCabe-Thiele (Ted):
--- Quote from: K2-K6 on August 02, 2023, 07:53:38 PM ---
"Is it okay to use a spring washer instead or is the tongued washer an essential locking tab?"
It looks like the spring washer is on a bolt isolated from the chain run, with the tabbed bolt having extra security being in vicinity of the chain and sprocket rotation ?
I can't tell fully from the diag, but that would make sense for the type of fixing security they provide.
--- End quote ---
Yes I can see that now you mention it - not sure where the tab locks into as it's not clear from the parts book - possibly it latches into the large round hole.
I will play safe & make a locking tab as I do not want to risk a bolt coming loose & striking the chain.
K2-K6:
Yes, I'd view as you do Ted, in that the lock tab appears to anchor in that nearby hole to secure.
Some of the others with more experience than I of 500 could likely shed some more focused light on it for you .
Oddjob:
I'd say you hit the nail on the head Nigel.
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