Author Topic: cb550 oil galley plug under stator rotor questions  (Read 352 times)

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Offline sixthwisconsin

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cb550 oil galley plug under stator rotor questions
« on: April 06, 2020, 02:29:45 PM »
On my 78 cb550 I have sprung a leak from the oil galley plug under the stator rotor. It was spewing out quite a bit of oil. I replaced the old hard O ring and Hondabonded the O ring and the mating surface after a thorough cleaning with acetone.  I hope this takes care of the leaks because the crank seal is very fresh and even if it is leaking, I can't imagine it would be this much volume.

My question is:
Why is there a gap from the plug to the stator cover of about 1/8"? What is the reason for this and is it necessary? Has anyone added some sort of a spacer to close the gap and hold the plug in place?

Thanks in advance.



« Last Edit: April 06, 2020, 06:26:04 PM by sixthwisconsin »

Offline bryanj

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Re: cb550 oil galley plug under stator rotor questions
« Reply #1 on: April 06, 2020, 11:45:59 PM »
Look in the cover, there is a cast peg that stops the plug, Honda designed it that way and it has worked on many 1,000's of bikes sonce 71
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline sixthwisconsin

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Re: cb550 oil galley plug under stator rotor questions
« Reply #2 on: April 07, 2020, 05:47:23 AM »
The cast peg is about 1/8" below the gasket surface allowing the plug to move that much.

Offline bryanj

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Re: cb550 oil galley plug under stator rotor questions
« Reply #3 on: April 07, 2020, 05:51:59 AM »
The O ring still seals and thats the way Honda designed it
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!