SOHC.co.uk Forums > CB500/550
Cb550f blowing main fuse
Bryanj:
The answer to my question may tell me WHY it blew and shorten the odds on culprit
Oddjob:
Something odd here. The first pic is confusing. The tank looks like a 550K3 but the side panel badges are off a 550K0-2 not a K3. Totally different. Plus IIRC the 550F has one upper mounting lug going vertical and yours are both horizontal The brake pedal is off a 550F, the 550K has a round tubular type. The clocks are blue faced, so either a 550F2 or a 550K3. The shape of the footrest brackets may clear it up as they are different IIRC between the 550K and the 550F. If the headlight was blowing the fuse why not the 7a fuse? try removing the headlight itself and run without it, see if it blows when the lights are on. If it doesn't suspect the lamp itself, if it does it's a wiring problem on the lighting circuit.
Bryanj:
Looks like rh sidepanel has been "modified" to get at seat lock as well
Otis:
Well, the OP hasn't popped in for while so I guess it is not an urgent worry.
He's certainly got enough to look into.
3scs:
--- Quote from: Oddjob on August 10, 2026, 06:12:10 PM ---Something odd here. The first pic is confusing. The tank looks like a 550K3 but the side panel badges are off a 550K0-2 not a K3. Totally different. Plus IIRC the 550F has one upper mounting lug going vertical and yours are both horizontal The brake pedal is off a 550F, the 550K has a round tubular type. The clocks are blue faced, so either a 550F2 or a 550K3. The shape of the footrest brackets may clear it up as they are different IIRC between the 550K and the 550F. If the headlight was blowing the fuse why not the 7a fuse? try removing the headlight itself and run without it, see if it blows when the lights are on. If it doesn't suspect the lamp itself, if it does it's a wiring problem on the lighting circuit.
--- End quote ---
it’s an F2 frame but your right it’s got some K3 bits on,the panel lugs are the same layout on both k3 and F2 on that side I think it’s the other side that’s different
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