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Messages - 3scs

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1
CB500/550 / Re: Cb550f blowing main fuse
« on: August 10, 2026, 08:39:11 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.
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

2
CB350/400 / Re: Stripped thread
« on: July 27, 2026, 08:23:34 PM »
Actually ignore my comment above that’s 550

3
CB350/400 / Re: Stripped thread
« on: July 27, 2026, 07:02:39 PM »
The correct nut is 8mm but it’s 14mm spanner size

4
CB500/550 / Re: CB550 F2 1978 Rear Wheel Spacing
« on: July 14, 2026, 08:51:25 PM »
This shows the difference between 500 and 550 the fins on the 500 hub lol the same height the 550 one fin is lower, also inside the 500 hub there’s some smaller holes, couldn’t you just line the sprockets up then get a spacer made up the correct length to fill the gap left on the brake plate side

5
CB500/550 / Re: CB550 F2 1978 Rear Wheel Spacing
« on: July 13, 2026, 08:42:58 PM »
Yes that’s an f2 swing arm with closed ends the k3 is open I think the problem is the brake plate but don’t know anything about any different ones if he takes the extra spacer out and pushes the wheel over the rear sprocket will be nearer to the centre of the chain guard and should be more in line with the front sprocket

6
CB500/550 / Re: CB550 F2 1978 Rear Wheel Spacing
« on: July 13, 2026, 08:11:39 PM »
Is it 40mm or 40mm ish it is hard to measure it built up it should be 36mm that 15mm one shouldn’t be there if you look at the picture of mine the swing arm sits a lot closer to the guard on the rear sprocket

7
CB500/550 / Re: CB550 F2 1978 Rear Wheel Spacing
« on: July 13, 2026, 07:19:16 PM »
Also the spacer that should be touching the left side of the swing arm is the one that comes through the seal that extra spacer shouldn’t be there

8
CB500/550 / Re: CB550 F2 1978 Rear Wheel Spacing
« on: July 13, 2026, 07:15:37 PM »
It looks like the spacer in your right hand side is maybe the wrong one can you measure how wide it is

9
Out & About / Re: Barton bike night
« on: July 02, 2026, 04:14:39 PM »
That’s not my picture I spotted that on fb I was on my xtz750 but didn’t get there while about 7

10
Out & About / Re: Barton bike night
« on: July 02, 2026, 12:52:38 PM »
Is this you Mick

11
New Member Introductions / Re: Keihin 069A carburettor question
« on: April 20, 2026, 07:20:46 PM »
That’s great news pleased your getting it sorted

12
New Member Introductions / Re: 1976 CB550F new member
« on: April 15, 2026, 06:52:30 PM »
Pleased your getting it sorted I’ve come to the conclusion that our two bikes have been stripped and carelessly rebuilt in the same shed at some point I think I’ve got your swing arm and seat stashed away somewhere 🤣

13
New Member Introductions / Re: 1976 CB550F new member
« on: April 04, 2026, 11:54:45 AM »
Yes that looks right I’ve got the brake pedal and spring here ready if you want them

14
New Member Introductions / Re: 1976 CB550F new member
« on: April 03, 2026, 03:48:31 PM »
Hi mate measure this distance and this is the correct pedal and return spring I believe

15
New Member Introductions / Re: 1976 CB550F new member
« on: April 03, 2026, 01:07:39 PM »
I might have what you need including the return spring which is different to the k one on e bay strangely enough I bout a k3 a few years back which had a lot of parts from the f on it the brake cross shaft is also different how desperate are you asi need to swap mine which means removing the swing arm it’s on my list of jobs to do and I’m not far from you also

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