I have recently got hold of a 159 which has been stored for a few months but was definitely a runner (and I can trust the guy I got it from). If I crank it over with the plug on the head I can't get a spark. I can't see anything obvious, the points check out with a multi meter and have tried a spare ignition coil which made no difference and have also tried more than 1 plug.

For the wiring into the 'chocolate block' is it correct that the red cable from the flywheel magneto goes to the black lead in the ignition coil?

Any advice gratefully received.

Have you tried disconnecting the kill switch yet, most common problem for no spark

The kill switch isn't connected at the moment

Black wire to HT coil,

Green wire to earth,

Red wire is for horn,

Yellow wire is for lights........

"Jobs a good un" thanks Guys