SOHC.co.uk Forums > CB500/550

A few questions

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corromant:
Well after3 months of waiting I will hopefully be collecting my new bike tomorrow, a 1975 CB500 four. So a few questions:-

How do I tell which model it is? & from a mechanical point of view does it make any difference when buying spares?

The tyres on it are unused but will be at least 5 years old (Avon RoadRunners) should I replace them? I feel I probably should but what do others think?

Oil? Back in the day would have been mineral oil or should I use a semi synthetic. I have found a good price on Shell Advance SX4 15w 40 (mineral oil), as I understand the low end of the viscosity range is needed on cold weather which I won't be using the bike in, so will 15 40 rather than 10 40 be ok. What oils do other use?

I'm sure I will have plenty more questions in the coming weeks, will try & post some photos tomorrow.

Thanks  Conrad

haynes66:
as far as the tyres are concerned, have a close look for any cracks or damage. otherwise, they should be fine.

Green1:
It depends how hard you intend to ride overtime the rubber goes hard even if they look fine they wont grip or flex as well as new rubber.
I would use 10w40 mineral oil and spend the savings on other goodies. ;)

Mick

matthewmosse:
Oil, I use Tesco diesel and petrol suitable engine oil on the reccomendation of a forum member, regular changes are more inportant than buying fancy stuff. Some of the more sophisticated oils can cause cluch slip if car orientated.
Tyres - I personally wouldn't hesitate to use any tyres that can pass an mot. If you really push your tyres and bike to the limmits, maybe buy new but that would only be something I would bother with if really thrashing the bike, and if you wanted to do that a 40 year old bike probably wouldn't appeal... the clue as to model will be in the frame number, a few members here would be able to tell you, but I am not one of them, of course you could also quote the frame number to a dealer such as David Silvers when ordering spares and they could tell you. It might make a difference on some bits such as throttle cables, and tail lights, but also many bits may have been changed over the years so nothing is garunteed.

deltarider:

--- Quote ---How do I tell which model it is? & from a mechanical point of view does it make any difference when buying spares?
--- End quote ---
In the first few pages of every part list you'll find the engine- and framenumbers of that particular model: CB500, CB500K1, CB500K2 [A], CB500K2 [ED, F, G]
http://www.honda4fun.com/materiale-documentazione-tecnica/parts-list/parts-list-cb500

--- Quote ---Oil? Back in the day would have been mineral oil or should I use a semi synthetic. I have found a good price on Shell Advance SX4 15w 40 (mineral oil), as I understand the low end of the viscosity range is needed on cold weather which I won't be using the bike in, so will 15 40 rather than 10 40 be ok.
--- End quote ---

You're right in your assumption, 15W-40 is fine unless you wanna run your bike in freezing conditions. I always have used 15W-40. The SX4 is a good oil. I personally use Castrol High Mileage GTX 15W-40 that does a good job in keeping the rubbers elastic and tight.

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