spark problems

TSample1 · Post by **TSample1** » Mon May 22, 2017 12:42 am

I am new to working on motorcycles, and i was given a 1964 ca77 by a friend. I am not able to get it to spark. I have 13 volts at the point, and new spark plugs. Any suggestions?

Muddy · Post by **Muddy** » Mon May 22, 2017 5:41 am

You may have already tried this, but if not...

Try new spark plug boots - the original metal Honda units are known to give problems. Cut an inch off the old plug leads before fitting the new spark plug boots.

Also make sure you are earthing the plug body against the motor when you are checking for the presence of spark.

Check the points are clean and gapped correctly. Use a static timing light or test pencil to ensure the points are opening and closing.

Good luck and let us know how you get on.

casamere · Post by **casamere** » Mon May 22, 2017 8:33 am

Coil gone bad?? Or condenser.

DJM · Post by **DJM** » Tue May 23, 2017 7:35 am

Hi,

This night seem obvious but is easy to overlook,
The C models use a 'double ended' coil which means that both plugs fire simultaneously, If one end is bad neither will spark,
Equally, if you don't have BOTH plug caps on the plugs neither will fire either.

TSample1 · Post by **TSample1** » Mon May 29, 2017 5:16 pm

I checked and the coil had gone bad, got a new one in, but now im working on fixing the wiring mess someone did trying to bypass the ignition, im having a heck of a time with figuring out which wires go where.