SOHC.co.uk Forums > CB500/550

Will early model 550 tanks fit a 78' K3?

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Hudson.:
Hi all,

As title, do earlier model tanks (ones without flush fuel caps) fit late model 550's? Im after a replacement tank as is stripped mine down to find a patch of filler hiding a big dent, its also rusted through and leaking.






 :o

Trigger:
Not sure what you mean by a early tank. All UK 550 tanks are the same, or are you talking about a USA early tank which is the same as a CB500 four tank.

Hudson.:
Ah right perhaps im confused then, was this style tank not on any of the UK models?

matthewmosse:
As far as I recall, yes they will fit, but fuel taps on earlier bikes may be 2 outlet ones so you may need to fit a blanking short bit of hose with a bung in it. The other issue you may come accross is that the seat may be either too close to the different tank or too far away ( cannot remember which ) the solution on my bike wss the seat was mounted using longer bolts and a shed load of washers were used to pack it out to sit right, I don't recall what was done with the peg to locate to the seat lock, I suspect it was just mounted on 1 bolt and a self tapper or rivett. I have a spare 550k3 tank with just a small dent - horrid paint - really horrid and it leaked and was treated with petseal many years ago so not much better than yours.

Trigger:
That style of tank was not on any UK 550's only the early 550 in the usa and Europe. It was originally for the CB500 and that has a two out let tap that will fit straight to 550 carbs with new fuel lines  ;)

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