SOHC.co.uk Forums > CB500/550

Is my swingarm original?

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K2-K6:
The 750 and 500/550 arms are very different in construction, one from the other.

The 750 is a true monocoq concept with the skin taking load in most direction, and really quite a clever design too.

The 500 relatively is poor, with roughly three tubes welded together and additional skin bracing stuck on top. They haven't even welded it where it probably needs it (internally near where the tire wall is) but then if they did that it's bad practice in fatigue teams from having a continuous weld that would possibly crack at that point. It's got the appearance of significant compromise in pure engineering integrity. Definitely looks cost compromised.

The 750 is a far more elegant solution, and in all reality a "box section" in it's own right.

deltarider:
I don't know what I've done wrong, but my swing arm still doesn't show play. I don't think I've greased it more than maybe 7 times in 140.000 km and some of my attempts have not even been succesful... Could the modification the model CB500K2 (ED, F, G) had, have anything to do with it? For a picture scroll down in: https://www.honda4fun.com/faq/generali/400-cb500-differenze-tra-k0-k1-e-k2

K2-K6:

--- Quote from: deltarider on March 06, 2022, 08:30:41 AM ---I don't know what I've done wrong, but my swing arm still doesn't show play. I don't think I've greased it more than maybe 7 times in 140.000 km and some of my attempts have not even been succesful... Could the modification the model CB500K2 (ED, F, G) had, have anything to do with it? For a picture scroll down in: https://www.honda4fun.com/faq/generali/400-cb500-differenze-tra-k0-k1-e-k2

--- End quote ---

Yes but you build your roads smooth on your country and much of Europe too  :) we don't do that here  ;D

McCabe-Thiele (Ted):

--- Quote from: Bryanj on March 05, 2022, 07:11:21 PM ---Ken, we both know that if greased like Honda said the originals would last forever. Its people expecting grease to last the 4 years it takes to do 1500 miles!
Like the Ford escort owner who was surprised his cambelt broke at 30,000 miles but it was 7 yrs old. Nobody reads the OR bit in the service scedule book!

--- End quote ---

Interestingly most car cam belt failures on modern cars are due to either tensioner wheels failing or severe oil contamination of the belt. The Volvo ones are changed at something like 100k miles or every 10 years. Inevitably the cost involves changing the tensioner wheels at the same time.

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