SOHC.co.uk Forums > CB500/550

76´CB550F, born to run, currently rehabing

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Bigbird:
Hey people, greetings called from fresh forum member

Many thanks for all the exciting readings, that helped make me go for it. Hereafter; my first machine on two wheels bigger than 50cc:
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I´m turning to this incredible forum for some help on the diagnostics side, because i´m pretty fresh on SOHCs.

Has:
- paint job
- custom grips, taillight, speedo from wrenchmonkey
- Marshall Deeptone exhaust
- cheap podfilters, which it got without being carbsynced and hasn't been running much since
- tendency to overheat
- strange sounds (will post video) :-\
- some oil leaks
- a good life coming

Needs, in suggestive order project starts at:
- gas tank clean
- inline gas filter
- timing
- valve adjust
- carb clean/rebuild
- carb sync
- possible cosmetics at some point

I´ll keep you posted along the way incase there are interventions or a good tip you want to share.
First of, later tonight, will be a video of the machine running. If you have any thoughts, feel free to share!

Cheers, good folk

mickwinf:
Hi and welcome to our forum, you will find lots of help here to get your bike sorted, model and pics will help.

matthewmosse:
I think you will at the least need to re jett to suit the pod filters and exhaust, I tried a similar setup at one stage and it was a case of lots of re jetting and spark plug chops or revert to a standard air filter - I went with the easy option and bunged the standard filter back on and it ran better. Pull out the sparkplugs and hopefully that might shed light on the overheating - I suspect it's running lean if overheating and aftermarket filters. I'd also do all the servcing jobs like camchain tension, points - tappetts etc before worrying about the carb syncing to be sure that is all spot on. Oil leaks can be sometimes ignored unless bad, but may indicate a deeper problem - my first big bike was a cb550k3, leaked oil, turned out it had a bad engine rebuild using instant gaskett goo and old reclaimed gasketts - back in those days I was keen and had the motor appart and half decent used spares bunged in where needed ready for a ride to Scotland the next day. Taught me a lot that bike did, though I'd have done better with this forum to consult, I only found it later on, much later on.

Bigbird:
Thanks for the answers, great to finally get started. I will be much safer building this thing with this thread on my back.
Following is a pre-tuning video, i´m getting started with the tank, timing, valves and carbs, but the clunky sounds and oil-lamp are more of a pain. I´ve been reading bout oillamps staying like this for years, but together with the clunky sounds could it be some bearings in the transmission? I recall reading about a connection there. Its got oil to the top, and the leaks aren´t too bad, but i would like to get an opinion about that as well. Post some more about that tomorrow. I´ve been thinking to change the oil to 15w40 to see if the clunk will disappear in high hope, but I see I might be facing the engine-pull here.

Thanks again

[flash]http://www.youtube.com/v/AzuKLNnJ4kI[/flash]

until i learn to build in youtubes:
http://youtu.be/AzuKLNnJ4kI

UK Pete:
Hi and welcome to the forum, well done you have now become a SOHC nut like the rest of us, good choice of bike
pete

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