1966AJS 250csr Bright spark

bag-o-nails · Post by **bag-o-nails** » Mon Jul 02, 2007 9:16 am

First of all
Many Thanks for all your Help in sorting out the weak spark problem
it turned out to be a very simple fix the current on the 6 volt system was just not strong enough to get through a modern surpressed plug gap i purchased a low reisistence unsurpressed cap and Bingo!
job done
A curious Problem Came to light with one of the new spark plugs
a champion plug that had clearly come into contact with either
the inlet valve or top of the piston??
In the tech.Articles under ignition it discribes precisely that
However with a bach of NGK 7ES PLUGS HAS any one else had this
problem? with a campion plug.

TommoT · Post by **TommoT** » Fri Jul 06, 2007 10:19 am

...now you didn't at some point drop that plug on the floor! A concrete floor will do what you describe to a falling plug (don't ask me how I know this, I had a similar experience where this was the cause, but maybe not so surprising from a person who have managed to connect the oil lines the wrong way around!)

Cheers!

Don Madden · Post by **Don Madden** » Fri Jul 06, 2007 4:42 pm

Are you sure it wasn't a projected tip plug. The original design was for a plug flush with the surface.
Cheers, Don.

bag-o-nails · Post by **bag-o-nails** » Fri Jul 06, 2007 5:18 pm

Hi Don
have you read the article under ignition?
cheers
Phill