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Author Topic: Been awhile / My #1 Cylinder keeps tapping spark plug  (Read 2502 times)

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Offline JamesHeller

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Re: Been awhile / My #1 Cylinder keeps tapping spark plug
« Reply #25 on: October 26, 2021, 11:05:43 PM »
Quote from: bryanj on October 20, 2021, 10:17:44 PM
Just to confirm it doesnt happen immediately and engine has to run for a while for it to happen?

Yes doesnt happen even when idle only during ride at about 50mph but two crushwashers did the job
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78 Honda Cb750K

Offline JamesHeller

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Re: Been awhile / My #1 Cylinder keeps tapping spark plug
« Reply #26 on: October 26, 2021, 11:07:17 PM »
Quote from: Phoenix on October 20, 2021, 08:18:18 AM
Stupid suggestion.  Use two crush washers.
it worked thanks for suggestion
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78 Honda Cb750K

Offline JamesHeller

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Re: Been awhile / My #1 Cylinder keeps tapping spark plug
« Reply #27 on: October 26, 2021, 11:09:13 PM »
Quote from: 2wheels on October 20, 2021, 10:43:55 AM
Is the motor very noisy (clanking) when running?
If it is.  Sounds like a connecting rod bearing is bad.

Did you do an oil change?  maybe lots of metal in the oil?
no motor clanking at all and no metal in oil
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Offline bryanj

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Re: Been awhile / My #1 Cylinder keeps tapping spark plug
« Reply #28 on: October 26, 2021, 11:47:52 PM »
If you are sure of both those then get another head
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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!
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