Honda-SOHC

SOHC.co.uk Forums => CB750 => Topic started by: El__burro on June 10, 2018, 09:44:54 PM

Title: Sparks on the points gap..
Post by: El__burro on June 10, 2018, 09:44:54 PM

Good day, I remember having sorted the same problem (sparks on points gap) previously by replacing the condenser..
This time that alone hasn't worked. I have realized that the the rubber isolating part that goes to the hole indicated by the orange arrow (in the img attached) was damaged so I improvised something.
Could be it?
How do you replace that tiny part (if you can)?

Thanks
el__burro(https://uploads.tapatalk-cdn.com/20180610/035624780c476d7bfb5a9bee3c12c43d.jpg)

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Title: Re: Sparks on the points gap..
Post by: Bryanj on June 11, 2018, 12:35:55 PM

New contacts as it does not come seperate mate

Title: Re: Sparks on the points gap..
Post by: Rob62 on June 11, 2018, 05:11:29 PM

Some new screws as well  8)

Title: Re: Sparks on the points gap..
Post by: 01thomas on June 17, 2018, 08:24:06 PM

Silicone?

Title: Re: Sparks on the points gap..
Post by: spanners on June 18, 2018, 12:56:53 AM

Hi, to answer your question, no your broken isolation washer (if it was allowing the screw thread to touch the bracket) would kill the spark at the points and stop the engine firing on two cylinders..

Other possible reasons for excessive sparking might be - if your points are pitted, oxidised, have a high resistance across them, or if they have been cleaned maybe with emery cloth or some sort of abrasive paper, (which leaves tiny bits stuck in the points surface)   

Is it only sparking bad on that set of points then? 

Title: Re: Sparks on the points gap..
Post by: El__burro on June 25, 2018, 10:57:02 PM

Actually i've replaced both condensers and points but still..
Points 2-3 produce a lot of sparks.
I have swapped the condensers around but 2-3 are still sparky.
It run great for the first few hours, then..

How do i disgnose the issue??
thanks
el__burro

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