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Author Topic: 1978 CB550 K4 PARTS  (Read 510 times)

Offline Brian Cairns

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1978 CB550 K4 PARTS
« on: January 20, 2024, 06:50:38 PM »
Hi,
I haven't got my bike that long and am giving it the once over.

The air box element ( part no. 17352374003) is missing.
I can't find this part anywhere on-line as it seems to be discontinued with no alternative.
Can anyone advise? can these be homemade etc?
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Cheers

Brian
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Offline Oddjob

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Re: 1978 CB550 K4 PARTS
« Reply #1 on: January 20, 2024, 07:06:50 PM »
Vent the engine to atmosphere and ditch the system. Fit the Cb500 air filter next service.
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Offline Brian Cairns

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Re: 1978 CB550 K4 PARTS
« Reply #2 on: January 20, 2024, 07:20:41 PM »
Quote from: Oddjob on January 20, 2024, 07:06:50 PM
Vent the engine to atmosphere and ditch the system. Fit the Cb500 air filter next service.

Yeah, the air filter is very oily!
Would changing systems affect the carb set up?

Cheers

Brian
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Offline b_1_rd

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Re: 1978 CB550 K4 PARTS
« Reply #3 on: January 20, 2024, 08:05:06 PM »
Give Nurse Julie a shout   :)

https://www.ebay.co.uk/itm/166504061370
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Steve
CB550 F2

Offline Oddjob

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Re: 1978 CB550 K4 PARTS
« Reply #4 on: January 20, 2024, 09:46:26 PM »
Not really, it was fitted to comply with the US market laws on emissions, mainly for the California market.
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Offline Brian Cairns

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Re: 1978 CB550 K4 PARTS
« Reply #5 on: January 20, 2024, 10:14:19 PM »
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Offline Brian Cairns

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Re: 1978 CB550 K4 PARTS
« Reply #6 on: January 20, 2024, 10:17:45 PM »
Quote from: Oddjob on January 20, 2024, 09:46:26 PM
Not really, it was fitted to comply with the US market laws on emissions, mainly for the California market.

Thanks, I assume you have to block up the tube on the airbox that the hose from engine vent fitted on to?

Cheers

Brian
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Offline Oddjob

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Re: 1978 CB550 K4 PARTS
« Reply #7 on: January 21, 2024, 12:35:54 AM »
If you're still using the 550 air filter yes, otherwise there is unfiltered air going into the engine intake. If you use a 500 air filter then remove the snorkel part inside the airbox and you can leave the pipe unblocked then, it's irrelevant. You may have to put something under the 500 filter as I believe the air filter housing is taller on the 550.
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Offline Brian Cairns

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Re: 1978 CB550 K4 PARTS
« Reply #8 on: January 21, 2024, 09:34:31 AM »
Quote from: Oddjob on January 21, 2024, 12:35:54 AM
If you're still using the 550 air filter yes, otherwise there is unfiltered air going into the engine intake. If you use a 500 air filter then remove the snorkel part inside the airbox and you can leave the pipe unblocked then, it's irrelevant. You may have to put something under the 500 filter as I believe the air filter housing is taller on the 550.

Thanks for the info

Cheers

Brian
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