79 GS400 Cafe Points (contacts) Question

[Guest]

Hi Guys,

Got the GS going yesterday again but only the Right spark plug gets hot. I couldnt see any spark coming from the left one and fuel builds up on it!

Now, looking at the contacts, the right one works fine but the left contact isnt even touching the rotating shaft!

Stupid question, I know these are linked but would that be the reason why there is no spark in the left plug?

I tried moving the contact points closer to the rotating shaft but I think the plastic contact is too worn and cannot reach.

Appreciate your help, really I do!

Dave

[pete]

To make spark, the contact has to close completely to "charge" the coil, then when the contact opens again that's what will let it discharge and fire the spark.

I haven't got any tips on replacing/adjusting these as I haven't seen them personally, but that's how they should work at least...

[tom203]

Get some new points (and condensers too !). As pete said, the points have to completely close in order to build up the charge in coil.

[Suzuki_Don]

Dave make sure the points are installed correctly. There is a small round knob on the rear face of the points plate that fits into a corresponding hole on the large timing plate they fit onto. This must be in place with the points plate sitting flat on the larger plate behind it. Then the screw is inserted and tightened up firmly (no gorilla hand required).

You should be able to see why the fibre heel is not resting on the cam. Just watch the motion of the points as you operate them to see what is binding or stopping the heel for moving the total distance it needs to.

Hope this is helpful.