questionable part

cac · Post by **cac** » Sun Sep 13, 2009 5:12 pm

1962 CB77 superhawk. I have no spark just got the bike. Battery is brand new power is getting to coils but nothing to plug wires or points I don't know a simple way to check this out,not very good with electrics. Also down buy my stator on what i believe is the magneto it says that part is a cb72 is this part being of a 250 mater with my electrical system. thanks again, sorry for being a pest. Chris

davomoto · Post by **davomoto** » Sun Sep 13, 2009 7:18 pm

Chris, all rotors are stamped CB72, opr CB72(L). Did you test the leads at points with a test light while rotating engine? If so, you may have a bad condenser. Make sure black wires are attached to + side of coil, green to right - and yellow to left - .

davomoto

cac · Post by **cac** » Sun Sep 13, 2009 8:10 pm

Dave I will try that, also both coils are getting warm to the touch. Tanks Chris.

Gunner_CAF · Post by **Gunner_CAF** » Sun Sep 13, 2009 8:38 pm

The power goes through the points to the coils. When the points are closed, it charges the coils, then the points open, it fires the plugs. It sounds like the points are closed if the coils are getting warm.

Hear is how I test them. Take a screwdriver and open the points. You should see a spark on the points when this happens. If you are not getting a spark, get a 12V test light. You can get these cheap at a auto parts store. Ground the test light, then touch the wire where it connects to the points. You should get a light on both sides.

If you have power to both points and you can't make the plugs spark by manually opening the points, your may have a problem in the plug cables or plugs.

Look in the FAQs here for instructions on how to set the points. You will need your test light for setting the points.

Gunner