SOHC.co.uk Forums > CB500/550
Primary chain and rubbers
Sesman:
Hi, Trigger. I very much appreciate your input. The drive needed a sharp downward rap Ona piece of softwood, then leverage. It certainly didn’t fall apart and needed persuasion. I’ve just received new replacements and will report shortly. Thanks again.
Sesman:
Ok, new primary rubbers have arrived. Absolutely no perceptible difference between new and old. I think I’ll be returning them?
Slipper blade total thickness is identical the new one, apart from the cam chain side plate tracks. It does however have a cure of significantly greater radius than the new one. The new one is also slightly stiffer to bend…slightly I’d say.
Not sire how you extract the horseless rubbers out of the tensioner unit though?
Trigger:
That don't make sense, unless someone has changed the rubbers recently without doing the chain as, a worn chain will feck rubbers and worn rubbers will snatch and stretch the chain ;)
Sesman:
I know…bizarre, but this engine has never been apart. Nothing shows signs of disturbance.
I’ve taken one new rubber out of the bag and the two items are identical in feel when pressing, twisting and bending.
Must be some kind of miracle :o
Sesman:
Meant to say. Oddly enough the tensioner bump stops were as hard as marble as predicted by oddjob. Think I’ll just replace the lot. Anybody want to buy some used, but perfect primary drive rubbers?
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