Author Topic: 1977 CB550  (Read 27274 times)

Offline Valentinik

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Re: 1977 CB550
« Reply #15 on: January 13, 2016, 11:22:44 PM »
Sorry i didnt phrase it very well. The tail light goes out when the ignition is turned off, but it come straight on when the key is turned.

I presumed it should only come on when the light switch is used? Or am i mistaken?

Mike
« Last Edit: January 13, 2016, 11:30:16 PM by Valentinik »

Offline Valentinik

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Re: 1977 CB550
« Reply #16 on: January 14, 2016, 05:34:39 PM »
I haven't got any lights on in the headlamp.  I've now disconnected all of the plugs in the headlamp and when the ignition is switched on the tail light still illuminates. So the connection must be elsewhere.  I've attached a picture of the frame plate and headlamp switch





Mike

Offline hairygit

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Re: 1977 CB550
« Reply #17 on: January 14, 2016, 06:34:31 PM »
It could be that a previous owner had a break in the loom somewhere, and rather than sort it properly has bodged a new wire or supply to the tail light, which is live all the time the ignition is on, with no way of switching it off ( seen it done a few times over the years) If it is an issue to you, do a thorough inspection of the entire loom and all it's connectors, looking for any odd/unusual looking bits of wire or strange connectors like the dreaded scotchlocks!

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Offline Valentinik

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Re: 1977 CB550
« Reply #18 on: January 14, 2016, 09:04:26 PM »
Thanks for the info both, I checked the fuse box, it looks very clean, no corrosion. The only time the light goes off is when this fuse is removed:



If either of the other fuses are removed the light stay on.

I then stripped all the tape off the loom and found no wires spliced that shouldn't have been. The only issue i found is the positive feed from the solenoid to the mulitplug that feeds the main loom, the red 12v+ wire was quite corroded and broke while i was examining it. I may replace these with modern waterproof connectors in the seat pan I'm going to fabricate.

I doubt this would be causing the problem with the light. To sum up, the light operates with nothing plugged in, only the main loom connector to the solenoid and the ignition switch, in the on position, not P.

Mike

Offline Valentinik

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Re: 1977 CB550
« Reply #19 on: January 15, 2016, 08:27:07 PM »
I made a start on stripping the engine down to try and limit any damage from any water. Tonight I got the head and cylinder removed, so far I'm pretty pleased with what i've seen. The bores look to be pretty good with no visible scoring or lips, so I'm hoping i can use it without a rebore. The only bit of damaged i've found so far is a slight mark on one of the pistons.











You can see the damage in the circle. After i've got it all stripped down and inspected i want to get the cases painted/powdercoated, is there a preferable way to clean the crankcase. Vapour blasting, etc?

Mike

Offline Valentinik

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Re: 1977 CB550
« Reply #20 on: January 18, 2016, 08:01:18 PM »
The logbook for the bike arrived today. Which pleased me as the seller never had it when i purchased the bike, against my better judgement i bought it anyway (after doing a HPI).

Anyway, i made a little progress tonight.  I never mention when i started the topic that I'd like to go with a brat style with the bike. I know its not to some peoples taste but i've always liked that style of bike.

With that in mind, i started on removing some of the brackets from the frame that i won't need. Side panel mounts, battery tray mount,etc.

Before


After


I only got one side done as it was getting late but hopefully tomorrow i will finish the other side off. Im not sure yet if I'm going to cut the rear of the frame slightly and weld an upswept hoop in like this:



Or just remove the bridging section between the 2 sides weld a brace in to mount the seat to.

Mike

Offline Valentinik

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Re: 1977 CB550
« Reply #21 on: January 19, 2016, 08:43:08 PM »
I got the brackets cut off the other side this evening:





I've just got a few smaller sections to tidy up and then i can cut the bridge at the back. I also got an impact screwdriver and undid all the bolts from the clutch housing, so i can carry on with stripping the engine.

Offline Valentinik

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Re: 1977 CB550
« Reply #22 on: January 20, 2016, 09:22:26 PM »
A question: I've read a lot of topics on keeping the standard airbox and filter. Seeing as i don't have the airbox and the carbs i buy will need rebuilding/rejetting to suit the engine. Other than having to rejet the carbs which i would have to do anyway is there any other issue with using pod filters instead of the standard airbox?

Thanks
Mike

Offline Norniron

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Re: 1977 CB550
« Reply #23 on: January 20, 2016, 10:50:08 PM »
A question: I've read a lot of topics on keeping the standard airbox and filter. Seeing as i don't have the airbox and the carbs i buy will need rebuilding/rejetting to suit the engine. Other than having to rejet the carbs which i would have to do anyway is there any other issue with using pod filters instead of the standard airbox?

Thanks
Mike
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Offline Valentinik

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Re: 1977 CB550
« Reply #24 on: January 25, 2016, 09:27:33 PM »
I finished off stripping the engine down tonight. The only sign of damage i've found from the water is a small amount of rust on the primary drive gear on the crankshaft. I haven't attempted to clean it up yet but I'm hoping il be able to.

Pistons and top crankcase removed:


Bottom crankcase, I've just got the main shells and primary shaft bearing to remove


Top crankcase, just the shift drum to remove


Mike
« Last Edit: January 25, 2016, 09:30:05 PM by Valentinik »

Offline Bryanj

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Re: 1977 CB550
« Reply #25 on: January 26, 2016, 06:24:44 AM »
Unless you have a problem with gears leave the drum in there but as you are that far down at least a primary chain is a good idea, you can just see the marks where it has started to touch the oil gallery

Offline royhall

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Re: 1977 CB550
« Reply #26 on: January 26, 2016, 07:17:24 AM »
Unless you have a problem with gears leave the drum in there but as you are that far down at least a primary chain is a good idea, you can just see the marks where it has started to touch the oil gallery
Blimey Bryan, you must have eyes like a hawk.
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Offline Bryanj

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Re: 1977 CB550
« Reply #27 on: January 26, 2016, 04:32:54 PM »
Have to to see through these glasses mate!! but just know where to look

Offline Valentinik

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Re: 1977 CB550
« Reply #28 on: January 26, 2016, 07:35:51 PM »
Thanks for the input chaps, i will replace the primary chain and cam chain whilst the engine is apart.

Will this gasket set be suitable? and will it include all of the seals i need or will these be extra?

https://www.davidsilverspares.co.uk/CB550K3/part_29005/


Thanks
Mike
« Last Edit: January 26, 2016, 08:10:48 PM by Valentinik »

Offline Bryanj

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Re: 1977 CB550
« Reply #29 on: January 28, 2016, 07:59:20 AM »
http://www.ebay.co.uk/itm/Honda-CB550-oil-Seal-Kit-Made-in-Japan-90000-374-000-/121875335555?hash=item1c60560983:g:oQ4AAOSwDk5T5sMS

Is an oil seal kit that comes with the rubber blanking plug, even from Australia its the cheapest one

 

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