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WM20 stopped after coughing, no spark anymore

Good morning everyone, after fixing the pushrod issue, yesterday after a ride of 290 km the bike started to cough. Then it stopped. I cleaned the spark plug and also replaced it and cleaned the points as well. Nothing, I cleaned the carburetor, still nothing. Then it started going downhill but after 30 km she stopped completely. Now I don't have any spark anymore. What could have happened? Thank you as always for any help you can give me.

email (option): drossi54@hotmail.it

Re: WM20 stopped after coughing, no spark anymore/2

I cleaned the points also because I saw I have lost the cover points

Re: WM20 stopped after coughing, no spark anymore/2

Maybe the points assembly has come loose on the shaft. I've had this happen when the tab washer hadn't been bent over the screw head.

Re: WM20 stopped after coughing, no spark anymore/2

Thanks Matty, will check it tomorrow.

Re: WM20 stopped after coughing, no spark anymore/2

Hi Daniel
Don’t discount the insulator on the bearing breaking up & causing intermittent spark loss
It happened me in France this year bike ran & then after a cough & splutter - it stopped with no starting her

Only after I took the mag pinion off did I find excessive bearing & armature movement
Worth checking - it’s normally the driven side that fails

Br
Job

email (option): Jonnyob1atgooglemail.com

Re: WM20 stopped after coughing, no spark anymore/2

Remove both the grounding and spark brushes and make sure they are not worn out or have oil on them.

Re: WM20 stopped after coughing, no spark anymore/2

Thank you guys, I will check all of this as soon as the temperature drops below 30 degrees :sunny: :fire: :slightly_smiling_face:

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