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BSA B40 No Spark

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  • Author
  • Author
7 hours ago, b40rt said:

IMG_0802.JPG.053a191550e0daac454fe10e46704b88.JPG

Points all set up and now have a spark drained tank and filled with fresh fuel kicked and Kicked still no go. Spark plug seems to be getting wet so back to the drawing board ?

Normal unleaded is fine. Have you tried a new plug ?  When you tickling it, don't go crazy, slightly flood it only. If the plugs wet, dry it, heat it and try again. To start it ease it over compression on the firing stroke, then give it a long push, rather than a kick. 

  • Author
10 hours ago, b40rt said:

Normal unleaded is fine. Have you tried a new plug ?  When you tickling it, don't go crazy, slightly flood it only. If the plugs wet, dry it, heat it and try again. To start it ease it over compression on the firing stroke, then give it a long push, rather than a kick. 

I'm going to get a new spark plug today it has a NGK B8ES in it is that right? 

 

Many thanks

  • Author
46 minutes ago, b40rt said:

NGK BP5ES

Thanks for that I'll get one ordered now ?

  • Author

New plug fitted and after 20 minutes of kick it fired into life engine sounded sweat. It doesn't want to idle tho which one on the carb is the adjuster screw?

PS thanks for all the help you lads gave me so different you my modern bike.

Assuming its an amal ? Screw nearest engine is the mixture screw, in for richer. This screw is very sensitive, so make very small adjustments at a time, and only once engine is warm. Screw behind it is tickover, in faster.

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