Author Topic: 1977 CB550  (Read 21588 times)

Offline Valentinik

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Re: 1977 CB550
« Reply #30 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 #31 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 #32 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 Oddjob

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Re: 1977 CB550
« Reply #33 on: January 26, 2016, 02:19:41 PM »
Yeah it's started to cut a groove in the transfer pipe from the oil pump to the gallery under the crankshaft, most likely it's also start to rub against that gallery but the picture is the wrong way round to show that.

Oil was clearly contaminated as the middle shell in the upper crankcase is looking milky white, just as well you split it to clean it all.

When removing the shells mark every one, not only which journal it came out of but which crankcase as well.

When renewing the primary chain also renew the primary damper rubbers or the new chain won't last as long as it should. Good idea to renew the camchain at the same time, won't hurt and they ain't that expensive.

Due to it's age and the way it's been stored I'd also renew all the seals as they tend to go hard over time.
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Offline Bryanj

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Re: 1977 CB550
« Reply #34 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 #35 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 Oddjob

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Re: 1977 CB550
« Reply #36 on: January 26, 2016, 07:43:51 PM »
A genuine Honda gasket set will include all the O-Rings needed but none include oil seals, these are bought separately although there are some kits around which have all the ones needed for the engine, I had around 10 sets of those for the CB500 but sold them all.

Hard to find a genuine Honda gasket set nowadays, they were listed as Set A and Set B IIRC, Set A was the upper gasket set and Set B was the lower cases. I have a Set B for the CB500 but some of the gaskets are slightly different from the CB550. It even used to include a new cork gasket for the starter motor cover  :) :)
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Offline Bryanj

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Re: 1977 CB550
« Reply #37 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

Offline Valentinik

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Re: 1977 CB550
« Reply #38 on: January 28, 2016, 10:44:30 PM »
Thanks for the info guys, i'l get the parts ordered.

Mike

Offline Oddjob

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Re: 1977 CB550
« Reply #39 on: January 28, 2016, 11:35:50 PM »
This would also do.

http://www.ebay.co.uk/itm/HONDA-CB500-F-CB500F-CB500-FOUR-ENGINE-OIL-SEAL-SET-ALL-YEARS-/111846177982?hash=item1a0a8d3cbe:g:QA8AAOSwnH1WaJO6

That's the same kit for the CB500, IIRC the only difference is the 500 has a clutch push rod seal, the 550 just has a blanking plug there. However the blanking plug unless damaged somehow doesn't really ever need replacing as there is nothing wearing against it, unlike all the other seals. So you could reuse the current plug and just replace all the others, the rest are the same seals for both engines. There may be an addition seal in the 550 kit for the clutch lever arm in the right hand casing, not sure if that's in the kit Bryan has linked to.
« Last Edit: January 28, 2016, 11:37:43 PM by Oddjob »
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Offline Valentinik

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Re: 1977 CB550
« Reply #40 on: February 03, 2016, 09:06:25 PM »
Tonight i got the rear seat frame mocked up in position. I just need to work out a way out finishing off the ends of the frame underneath the hoop.





The wheel is only there to check positioning.  Im having a set of new spoked wheels made with black powder coated rims and stainless spokes with the hubs i've got.

Mike

Offline Valentinik

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Re: 1977 CB550
« Reply #41 on: February 12, 2016, 07:46:21 PM »
I spent a few hours on the frame this afternoon and got it finished.

Rear hoop and seat mounts welded in:





I also made a small battery box and welded a bracket underneath the swing arm to mount it. I just need to weld the aluminium box up




Mike

Offline Valentinik

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Re: 1977 CB550
« Reply #42 on: February 17, 2016, 08:13:20 PM »
I made the aluminium panel for the seat tonight and mounted it to the brackets i welded on the frame. The bolts are only temporary.



Mike

Offline Valentinik

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Re: 1977 CB550
« Reply #43 on: February 23, 2016, 07:29:03 PM »
The brake light switch attaches to a bracket, on the 500 and I'm fairly sure the 550F it's a bracket welded to the frame, on the 550K however it went into a bracket which was separate and attached to the upper rear engine bolt, probably why it's loose as on the 500 and 550F you wouldn't really need to remove it. It's missing a long thin spring which goes through the hole in the pin you can see protruding from the switch.

If the carbs are missing I'd fit the carbs off either the 500 or the 550F as the 550K carbs were much different and TBH are pretty pants in comparison. You'd also need the airbox to match but it's a worthwhile change as the 550K carbs really are that bad.

With reference to this post oddjob made about fitting some 500 carbs. Im looking at buying some but i wondered what year 500 bike would i need to be looking for and what  the model of the carb is?

Thanks
Mike

Offline Oddjob

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Re: 1977 CB550
« Reply #44 on: February 23, 2016, 09:03:22 PM »
Any of the CB500 fours or the 550F version. The only model to avoid is the one you had, the 550K3. There are others of course but the only one which got imported by Honda was the K3. There are slight differences between the 500 and 550F carbs but it's mainly jet sizes, the rest is as good as identical.
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