SOHC.co.uk Forums > CB500/550

Piston Rings

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Trigger:

--- Quote from: Oddjob on June 12, 2020, 03:46:55 PM ---I don't like the 550 engine in a 500 frame Graham. The bigger clutch housing interfered with the rear brake lever, tried it before, didn't like it so went back to the 500. It's far away from standard yes but it's all that era Honda parts, I just prefer to upgrade the stuff Honda should have got right in the beginning  ;D ;D

Always thought the 500 liners wouldn't bore out to a 550 piston Bryan. Well not safely anyway. My engine number begins 20249** not exactly sure how that sits in the engine number range.

Not sure if first over will be enough Ash, most likely would be before buying I'd prefer to see and check first, at 3rd over your pretty safe it will clear at that.

--- End quote ---

I can't see that. I have a 550 motor in a 500 frame and there is no interference of the brake pedal. The 550K0, K1 and K2 had the 500 frame and brake set up  ;)

Bryanj:
But did you get regrade quality Dunlop ribbed Trigger?

Bryanj:
I think Honda changed the size of the hole in the cases of the 500 during the production run somewhere, i remember having an early 500 and the 550 cylinders wouldnt fit but the 605 liners i have will go in the new cases i have.
Somewhere i have a plastic crate with lots of pistons in and one set was sold as 12th o/s 500 (59mm) only problem is the liner taper is mostly gone then so you need removable ring compressors, but then if i can get my hands in to do a wing i can do that!!

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