SOHC.co.uk Forums > CB500/550

CB550f V CB550K3

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Trigger:
Some time ago i asked on whether a CB550F tank was any different to a CB550K3. I had many replies and the one that stood out was they were different sizes.With the K3 being about a inch longer than the F. One quote i remember was one member telling me that if i put a K3 tank on a F that the seat wouldn't close. So i went out and found someone that has a CB550F2 and a CB550K3 to put this to the test.
I sent him the measurements of my tank just to see if there was any difference. The first result was the two tanks that he has are identical. OK, the K3 he has is unmolested, so the tank on his F2 is wrong maybe. He then went on to use the measurements from my tank and found that they were all the same.     

matthewmosse:
Interesting. I find it all very confusing as in the past I carried on in blissfull ignorance and assumed all 500 and 550 bits were interchangable - if they were not I often just made sure they did fit with bodgery. Now I have internet and am aware that taking Mr hacksaw to a good seat might well end up robbing me the chance to swap a wrong seat for a right seat. Better result, but more stress.

Steph550:
If I'd seen this yesterday I could have double checked for you, my other half has a nice original 550K3 in the garage along with my F2... I'm now away from home until the weekend but can have a look when I'm back if you like.

From memory and from the photo below I would say the tanks are the same, seats are definitely different.



Had a great ride on the F2 yesterday around the New Forest, showed the guys on their old Triumphs and Nortons that a girl on a Honda can be pretty quick too...  ;)

Steph.

Trigger:
Cheers Steph, it is a debate that has gone on too long. So your bike is no longer a ghost  ;). Yep, it was very nice yesterday at 19 degrees.

matthewmosse:
I think I recall something in the Broolands book about the differences being carbs, seat, and exhausts from memory.

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