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What have I got?

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Mariner Wayne:
Hi, Can anyone please advise / help identify what bike I actually have.
I thought (hoped) I had a 1978 550 K3. The bike wasn't identifiable when I purchased it some years ago.
Since embarking on the rebuild I have discovered it has F carbs and now I have found it has F front forks as well.
It has an engine no CB550E 2022251 and a chasis no CB550K 2021517
How can I confirm the model from this info?
Thanks

Oddjob:
The K3 shares a LOT of parts from the F model, especially the F2. if I remember correctly the forks are the same part numbers as the F2.

It's quite common for the carbs to get changed to the F carbs as the standard PD carbs are a nightmare.

Quick way of identifying a K3 from an F is the swinging arm, if it has removable bungs on the end it's a K3, if the ends are closed it's an F. This was because the K3 got 4 exhausts and you couldn't get the rear wheel spindle out so they fitted ends that detached so the wheel came out backwards.

Nurse Julie:
Hi Wayne. My 550 Mongrel, Millie, has a K3 frame and that has a 20*****VIN. Mind you, that is about the only part that is K3 😂😂😂😂 Oh, maybe the forks are K3 🤔🤔🤔

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Oddjob:
Another clue, just remembered the rear brake lever is flat on the F but round on the K.

deltarider:

--- Quote from: Mariner Wayne on January 24, 2022, 06:18:19 PM ---Hi, Can anyone please advise / help identify what bike I actually have.
It has an engine no CB550E 2022251 and a chasis no CB550K 2021517
How can I confirm the model from this info?

--- End quote ---
P.4 will give a clue: https://www.honda4fun.com/dwnload/Part-List/CB500/CB500-K3-CB550-K3-K4-Parts-List.pdf Is the speedometer in miles (DM) or in kilometers (DK)?

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