No spark

[hogglide]

Fitted new front rubber engine mount to my 96 Roadking which involves moving regulator out of way.Disconnected the two pin plug from crankcase but when i put everything back together and turn bike over,no spark? bike was fine before i did this,any ideas.There is power to the coil but nothing at plugs?

[Limey_Dave]

If you've got 12volts at coil but no spark then it sounds like a problem with the points etc.
If there's no connection from coil to points or points to earth then the field in the coil wont colapse and no spark.
If you're not running points,the principle is the same.
Best guess is you disturbed an earth somewhere.

[chilly]

Regulator needs a good earth mate,maybe not what your problem is,but i run a fly lead from it to the frame, making sure that both ends of the lead are making proper contact to the metal.

[dantheman]

Originally Posted by chilly

Regulator needs a good earth mate,maybe not what your problem is,but i run a fly lead from it to the frame, making sure that both ends of the lead are making proper contact to the metal.

same here

[kiwidave]

Bizarre.

even if the regulator was unearthed or unplugged, that should not affect spark. Not for a while .... all that means is that the charging system is not working but the bike should still run off the existing charge in the battery.

Does starter turn over fine as normal?

Grounded a plug on the head to see if there is any sign?

Kill switch/handlebar wiring not disturbed at all recently?

No obvious cracks in the coil, nor chrome cover digging in to it?

[hogglide]

Starter turns over fine

Have grounded plug against cylinder no spark


Have not been near kill switch


Cant see any visible cracks in coil and dont have chrome cover


I have seperate earth lead from crankcase to regulator bracket

[Hawkeye]

IF you have points you can carry out an easy test. Turn engine so that the points are closed, turn ignition then use a small screwdriver to just open the point, you should get a spark, if not put the small driver between the points and twist it a little. This may generate a spark . Sometimes point get some kind of muck between them stopping the spark.


Another quick test is to take a live straight from the battery to the live terminal on the coil, this takes out any switch gear in the harness. The bike should then start, no ignition switch needed.

[hogglide]

Turned her over tonight and she burst into life!!!Theres a problem somewere i think it could be an earth problem.

[Simon_Y]

Aren't those sort of problems sent just to piss you off cause there will be the nagging doubt that the problem could resurface miles from home.

Simon.

[hogglide]

It has crossed my mind Lol