Honda-SOHC
SOHC.co.uk Forums => CB750 => Topic started by: Pauarc on June 02, 2023, 12:19:28 PM
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Could this top seal be giving a vacuum leak as it’s damaged
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Possibly. A good bit of investigating there.
There is another thin rubber type gasket inside the screw top, so possibly not affecting how it runs.
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A mate who used to work for a Honda bike shop in the 70s had some of the top grommets so carb are coming off to try them
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Hi Pauarc,
Interesting. I was wondering about air leaks here. I don't see a part number for that other than a "Top Set", but the drawing is unclear. Unlikely, but do have 4 spare parts for sale?
Cheers,
Jerry
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I’m going to see my friend I will see if he may have a part number l haven’t fitted them yet but he told me that they just prize and the new ones just push in
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Could this top seal be giving a vacuum leak as it’s damaged
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One way to ell would be to spray carb cleaner at the top of the carbs whilst running to see if that influences anything and could point to a leak.
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One way to ell would be to spray carb cleaner at the top of the carbs whilst running to see if that influences anything and could point to a leak.
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Yes but if have you wear on the rod in a position other than at tick-over, it might be difficult to detect if the seal is worn just enough to leak a bit at that point.
I'm thinking that maybe the most worn part of the rod is when going on off the throttle. Clutching at straws here!
Cheers,
Jerry
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Could this top seal be giving a vacuum leak as it’s damaged
It could possibly, but to my mind that's just a scraper seal to stop crap getting to the inner seal. I may be wrong though, it has been known. ;D