SOHC.co.uk Forums > CB500/550

CB500 Four - engine cuts off in idle

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deltarider:

--- Quote from: McCabe-Thiele (Ted) on November 03, 2023, 08:17:39 AM ---[...]
At under 700 rpm they never sound happy imho.

--- End quote ---
An pro Honda mec told me: they're not all alike, for some reason that we don't know, some will never idle happily @ < 1000 rpm.

philward:
Although I can get it to idle at 500, it's set at 1000

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Sesman:

--- Quote from: Oddjob on November 02, 2023, 05:33:27 PM ---
As Bryan says, put the original jets/needles etc back in, aftermarket jets are quite frankly awful, poorly made, lack of precision etc. Especially the float seat parts, they leak for fun as a rule.

--- End quote ---

I wonder from where the guy at classic octane sources his ‘kits’. He never seems to have any issues…..or does he🤔

philward:
In my experience, the Japanese Keyster kits have worked for me when I have not been able to use original brassware - which I prefer to use. Had to use Keyster float valves on a few rebuilds and they have been fine. It's the cheap Chinese kits that are rubbish

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deltarider:
There are more like Classic Octane. I can't take them serious.
It's the usual American bragging:
"But before I demonstrate how to set the ignition on a CB500 or 550, I wanna show you guys my new blasting cabinet that arrived from Amazon today and-it-is-aw-some."
And then later he ofcourse forgets to even mention the checking cq adjustment of the breakerpoints gaps and goes to twisting the plates rightaway.
In general Commonmotors has some good instructive videos, although I disagree on some details.
For carbs (either CB350F/400F or CB500/550) Motormac at Youtube is best. Language is German. Only he should not have fitted Keyster parts imo, be it that he's gründlich enough to show us the difference in dimensions between OEM and Keyster float valve sets. 

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