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1978 CB550 K3 "running" restoration
Bradders:
--- Quote from: SPR on April 03, 2020, 01:12:02 PM ---
--- Quote from: Bradders on April 03, 2020, 01:07:09 PM ---Your forks look good SPR. What did you use to clean them up. Mine look like the before pictures.
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Tried various approaches but the best was long strips of wet and dry 240 grit and then 400 / 600
Used a dremel with small hard polishing cone to start getting a finish then when I'd destroyed my supply went to autosol and fine grade wire wool
They aren't bad and will fit in with the rest of the bike when done as a "survivor" rather than a restoration as I intend to use it without worrying too much :)
Thanks
Simon
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Thanks Simon will give it a try.
SPR:
Some more progress
Tanks off and indeed as mentioned both throttle and choke were routed incorrectly.
Bars off and new choke cable fitted with the new bars - managed to reroute the throttle cables and it now snaps back as it should.
Mirrors fitted and everything back together.
David Silvers managed to not send instrument gasket so still waiting on those.
Do have one problem - got new spark plugs - DE7A - and plug spanner .... gapped new ones but am unable to remove old - they are a smaller size ?? I’m guessing 16mm.
Has anyone come across this before ? I think they are old Champion plugs.
Thanks
Simon
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Bryanj:
Champion plugs had the same size hex if i remember right
SPR:
--- Quote from: Oddjob on April 06, 2020, 01:36:03 PM ---If they are old Champion plugs they'll most likely be imperial size, so not metric. Try and find a suitable long reach socket to get them out. Be careful as they may have been in there a long time, be especially careful with cylinder 3 as it has the tacho drive right above it and breaking that will be a major problem as they are very hard to find these days.
Couple of more things to think about.
If you intend to keep the bike think about these.
At some point changing the carbs to the CB500/550F type. Much more reliable and a LOT less problematic than the PD carbs currently fitted.
Consider fitting a second disc to the front, looks more balanced and gives better braking. It would also mean replacing the tired looking master cylinder which TBH kinda spoils the look of the bike ATM.
As you can see areas like the inner cups of the tacho/speedo rust and you can't see it happening. Especially true of the inner parts of the fork ears and underneath the rear mudguard to name just a few, protect these areas with some sort of rust proofing. I use Zinc paint and it works just great, other solutions are available like underseal for instance. The price of replacement parts is going higher and higher each year and some are very hard to source now so try and protect what you've got is a good idea.
The colour of the header pipes indicate a ignition problem at some point, could be mixture is too weak or timing is wrong. Check timing etc. Don't assume because the dealer said it had been done that they actually knew what they were doing, won't cost anything and will give you some idea of working on the bike for the future.
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All good points ... I'm using ACF50 and Gibbs at the moment for the suspect areas
Good point about the carbs and if I can't get it running well may have to look at swopping but TBH money is an issue at the moment - will look at checking the timing to see if its withing my skillset :)
SPR:
--- Quote from: Bryanj on April 06, 2020, 01:58:10 PM ---Champion plugs had the same size hex if i remember right
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Just double checked and it seems to def look like champion printed but they are much smaller hex size ... will source some long thin wall sockets
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