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Topics - davidrsmith
1
« on: August 21, 2023, 10:58:59 AM »
Hi
As I mentioned in an earlier post whilst turning left onto my drive , the bike cut out and it all went dead.
I have just managed to get time to start investigating, the battery was only giving out 7 volts, so I have changed that and I have checked all of the fuses none were blown and I now have just over 12 volts at the main fuse, but nothing at either the headlight or taillight fuses.
When this happened about 5 years ago it was the ignition switch, so I have disconnected the switch and inserted some jumpers into the wiring harness plug for the ignition switch, no difference. I have also ensured the kill switch is not in the off position, I have tried the lights, indicators and horn, nothing.
Before I start stripping the wiring harness to look for a short, can anyone give me an idea of where else I can check, or indeed has anyone had the same problem?
Many thanks
Dave
2
« on: June 20, 2023, 10:04:26 PM »
Hi
For the second time in two years I have had a total electrical failure on my K3 ( US import), the first time I had to replace the ignition switch and a wire in the wiring loom under the petrol tank as it had shorted out. I had the same problem in the late 70's when I owned a K3, that was the mechanics who changed the fork seals routed the harness incorrectly on reassembly.
I haven't started to trace the fault this time yet, but I am thinking of biting the bullet and changing the main wiring loom, hence some questions:
1) Where is the best place to buy a new loom from, I live in Gloucestershire, I'm sure somebody told me a while ago that there was a guy in Cheltenham who makes them up, has anybody used him or have any contact details?
2) Are the looms on the DS web site any good for US import K3's?
3) Can I change the main loom without totally stripping the bike down?
Many thanks
Dave
3
« on: April 17, 2022, 02:15:26 PM »
Hi
Has anyone seen this one around, it was the white Euro Sport edition, I bought it in 1994 and used it for travelling backwards and forwards to Germany. I owned it until about 2000, I see on the DVLA web site it was SORN'd in 2011
Regards
Dave
4
« on: August 18, 2019, 09:23:52 PM »
Anyone ever seen or heard of or own this bike, I last saw this bike in the early 1980's when my brother in law owned it.
5
« on: August 08, 2019, 07:50:13 PM »
Hi
I have got my new ignition switch and replaced the red wire from the fuse to the ignition switch plug (see previous posts).
When I started putting it all back together I was looking at the route of the wiring loom where it goes around the fork yokes, the main part of the loom goes under the triangular metal piece that forms the bottom of the yoke then up into the headlight. It looks a bit tight and i think it need to go above the triangular metal piece. I can't find any diagrams that show the correct routing, can any 550 owners tell me how theirs is routed around the yoke area.
Thanks
Dave
6
« on: July 24, 2019, 07:41:46 PM »
Hi,
I rode my K3 to work today, about 2 miles from home I had to do a left turn, as I did the turn all of the electrics died and the engine cut out.
I checked the fuses, a 15amp one was blown so I put spare in, turned the ignition on and nothing.
I ended up pushing the bike home as I couldn't get anyone to pick it up.
When I had K3 years ago a local shop did some work and routed the cables to the bottom of the ignition cables incorrectly so when going around a bend the contacts broke and the ignition cut out, remembering this I tried waggling the ignition wires but not a flicker.
Someone tried to jump start the bike but again absolutely no electrics.
Anyone got any ideas please before I start looking at it during the weekend
Thanks Dave
7
« on: October 07, 2018, 08:36:42 PM »
Hi,
I have just refurbished the seat on my CB550K3, thanks to Bob@moretti for his help and advice.
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Now to do the Tank emblems!!!
Dave
8
« on: September 03, 2018, 07:49:01 PM »
Hi
I have bought a new seat cover for my K3, but looking at the current seat I think the foam at the back of the seat is a slightly different shape. Does anyone know where I can purchase a new seat foam from, I can't find one online?
Many thanks
Dave
9
« on: June 22, 2018, 11:21:03 AM »
Hi
Does any know the colour code or part number for the Excel black paint used on CB550k3's?
I am getting some work done in a couple of weeks and I want the guy to use the correct shade of black, he is going to try and find the colour mix code, and I said I would try and find it also.
Many thanks
Dave
10
« on: April 21, 2018, 10:06:20 PM »
Hi
I have a CB550K3, a while ago BryanJ gave me another tank which to all intents and purposes looks like a K3 tank, and fits on the bike well.
However the petrol tap has two outlets and these are vertical from the bottom of the petcock, the problem is that my carbs only have one petrol inlet and the vertical distance between the bottom of the petcock outlet and the top of the carb inlet is very small, and with the backing plate that holds the four carbs together in the way I'm fairly certain the fuel isn't flowing properly because I can't get a smooth bend in the fuel pipe.
The original K3 petcock has one outlet which comes out horizontally.
I want to get a 'K3' type petcock for the new tank but the I really need to identify the type of bike the tank came off (Bryan is unsure). The K3 petcock is a different thread size to the one on the new tank, the new one is has a 24mm nut, I measured the thread and it is 19mm, I assume this is 18mm + 1mm thread depth.
Anyway attached are a couple of photo's of the new tank and its petrol cap which may help to identify which model of bike it was originally fitted to.
Many thanks
Dave
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11
« on: April 19, 2018, 08:40:02 PM »
Hi
Now I'm riding the bike a bit more now the weathers better I have noticed that around 4000 rpm, in any gear, it feels like I'm getting fuel starvation. If I open the throttle a bit more it seems to overcome this and carries on revving.
I have checked the fuel line isn't kinked etc, (I have a fuel filter in line).
I thought I'd read a similar post on here some time ago, but I can't find it.
Has anyone got any ideas?
Many thanks
Dave
12
« on: February 11, 2018, 07:49:40 PM »
Hi
I took my CB550 K3 out for a ride today, I only did about 15 miles but when I got home I noticed oil trickles down the gearbox casing on the left hand side and also on the gear lever rubber. On closer inspection the cylinder block engine cooling fins also appear to have oil on them. See picture below. So I guess it means a top end gasket change?
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Also when the bike was warm and ticking over I also noticed that cylinder 4 was popping every now and then. What could be the cause of this and I guess it is not worth trying to fix it until the head gasket is done?
Many thanks
Dave
13
« on: November 18, 2017, 04:44:57 PM »
Hi
I have now fixed the sticking front brake, thanks to all who answered my query especially BryanJ. I took the bike out for a test ride the other day, in top gear it was doing 60mph at just about 5000rpm, can anyone with a K3 tell me if this is about right.
Perhaps its the mists of time or just an age related thing, but as far as I can remember my old K3, back in the late 70s didn't need quite so many revs to stay at 60mph in top gear. But saying that it seems to be running well and I am pleased with it.
Many thanks
Dave
14
« on: November 05, 2017, 11:22:29 AM »
Hi
I have now fitted the UK handlebar switch but I need to rewire the rear light to fuse and fuse to switch etc to enable it to all work correctly.
Can anyone tell me the gauge of the wire please?
Also were can I obtain some bullet connectors and sockets?
Many thanks
Dave
15
« on: November 02, 2017, 01:34:04 PM »
Hi
I have just managed to get my CB550K3 on the road, after about 10 miles the front brake started complaining. When I applied the brake it worked correctly, but after I released the lever it sounded like one of the brake pads was touching the disc, and made a hell of a noise.
I haven't had a chance to look at it yet but I assume that the piston isn't retracting properly when I release the lever. Can I put some sort of lubricant on the piston to help it move smoothly?
Many thanks
Dave
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