CG Ignition

[guest27]

Hi all

Mumpth question but I am sure I have missed something and I dont want to take another bike apart for a "Doh!" moment...

Not getting a spark on the CG.  After a bit of fiddling I thought that the points were not opening - the Black and White wire from the points to the low tension side of the coil were showing continuity all the time.

Fiddling a bit more - putting an ohms meter across the points and seperating the electrodes produced no change - should have gone to infinity?

Have taken points out and disconnected the junction carrying the wires from the generator etc to the rest of the loom to see where the possible fault is.  Neither end of the wire is touching the frame etc at the end yet I get continuity to earth - I have a short between the wire and the frame / engine somewhere dont I.  Should be just a bit of wire running from inside a casing through the loom to the junction, there is no other reason for the reading I get - or have I missed a real simple one here?

R

[KirriePete]

Fiddling a bit more - putting an ohms meter across the points and seperating the electrodes produced no change - should have gone to infinity?

Long time since I fiddled with points, but I seem to recall that the test is wiring a light bulb across the points - it should go on as the points open.  That's cause the little electrical pixies use the points as a bridge to get across the system, when the points open the little pixies have to go the longer way round through the coil(s), which makes them bungee jump across the plug gap.  So when you open the points there is still continuity, it's just a longer road for the pixies.

Nurse!  The screens!

[guest27]

Think my pixies are all sunbathing or off on hols

R

[guest564]

The high voltage side of the coil is only coupled magnetically, you should get a high impedance reading when the points open. I would start by checking that the condenser isn't short circuit.

[guest27]

The high voltage side of the coil is only coupled magnetically, you should get a high impedance reading when the points open. I would start by checking that the condenser isn't short circuit.

 Thanks for the thought - will give that a go too - mind I have what I assume is a short section of wire - connected to nowt either end showing no resistance - may have to pull more off - bum!

R

[guest564]

It may be broken internally, I've seen that before.