weird spark issue

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rgla

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I have no spark at the plugs - well kinda. This 73 is operating with a Boyer. Very reliable for 25 years on the bike.
I have no spark when I pull the plugs out and lay them on the head. HOWEVER, when I turn the key (aftermarket ignition switch) I get a single spark when the key is turned on or off. Additionally, when I press the KILL SWITCH the spark plugs give a spark. But when I kick the bike - no spark.
How do I hotwire the key out to test AND can I run the white wire from the boyer/coils right to the wire wire from the headlight cup/igniton together or will this hurt the Boyer?
 
rgla said:
I have no spark at the plugs - well kinda. This 73 is operating with a Boyer. Very reliable for 25 years on the bike.
I have no spark when I pull the plugs out and lay them on the head. HOWEVER, when I turn the key (aftermarket ignition switch) I get a single spark when the key is turned on or off. Additionally, when I press the KILL SWITCH the spark plugs give a spark. But when I kick the bike - no spark.
How do I hotwire the key out to test AND can I run the white wire from the boyer/coils right to the wire wire from the headlight cup/igniton together or will this hurt the Boyer?
Click to expand...

Sounds like you have a pickup or pickup wire problem. Jim
 
rgla said:
thanks. can you just elaborate on "pickup"?
Click to expand...

The pickup assembly is under the cover where the points used to be. Broken wires at this point are common. Jim
 
rgla said:
How do I hotwire the key out to test AND can I run the white wire from the boyer/coils right to the wire wire from the headlight cup/igniton together or will this hurt the Boyer?
Click to expand...

Connecting Boyer box white (not coils) to harness 'white' only bypasses the kill switch.

To additionally bypass the ignition master switch you need to connect Boyer box white to brown/blue or battery negative.

http://www.tioc.org/boyer/boyertestnewweb.htm
 
good spark when bypassing ignition and kill - brown blue to boyer white.
loose connection where 3 wires are taped together: Kill switch (white) / white yellow and / white from headlight bucket
 
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