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1978 CB550 K4 carb choke spring

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Brian Cairns:
The spring in the photograph ( not my carb) is missing and replaced with copper wire hack.
I finally found a replacement spring have hunting one down of eBay.

Can anyone point in the right direction of how to replace this spring i.e. how do you remove and replace choke linkage?
They are PD 46A carbs

Thanks in advance
Brian

Seabeowner:
If this is a USA import then I believed that the 1978s had PD46C like mine has. But maybe they were just using up bits as it was the end of the line. The main throttle spring is mounted round the throttle shaft on the PD46C.
But back to the choke shaft. I  am not going to be much help. But think the C and A both have the double spring arrangement. When I split my carbs a few years ago I remember that getting that spring wound to give the correct force was a a nightmare so take note how much it unwinds when it lets go.

Johnny4428:
I’m nearly sure that these have to be separated to replace spring. At least 1&2 separated from 3&4.

Brian Cairns:

--- Quote from: Seabeowner on January 19, 2024, 06:54:22 PM ---If this is a USA import then I believed that the 1978s had PD46C like mine has. But maybe they were just using up bits as it was the end of the line. The main throttle spring is mounted round the throttle shaft on the PD46C.
But back to the choke shaft. I  am not going to be much help. But think the C and A both have the double spring arrangement. When I split my carbs a few years ago I remember that getting that spring wound to give the correct force was a a nightmare so take note how much it unwinds when it lets go.

--- End quote ---
Hi
Sorry, you are correct, carbs are PD46C.
Cheers
Brian

Brian Cairns:

--- Quote from: Johnny4428 on January 19, 2024, 09:52:01 PM ---I’m nearly sure that these have to be separated to replace spring. At least 1&2 separated from 3&4.

--- End quote ---

Thanks

Brian

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