Question about 1982 Honda VF 750 S
There are two ignition mods under the seat one of them is bad they are 140 bucks at dealer
Posted on Jun 29, 2009
Hi and welcome to FixYa,
With the indulgence of Knight 007...
The tact dying is significant. It indicates that the pulse drive from the spark unit (CDI) towards the ignition coil has gone missing. The intermittent problem almost always points to a loose connection from the CDI connector to the terminal of the coil for the cylinder that misses. This would be the yellow wire of CDI to yellow wire of harness. This should not be mistaken for the yellow wire from the other CDI that connects to a blue wire that goes to the other ignition coil and fuel cutoff relay.
In some instances, the intermittent loose connection could be heat related and internal to the spark unit. A way to verify is to interchange the spark units where in the expected problem would be that the tach would no longer fail but the bike would suffer with fuel starvation.
Perhaps a wiring diagram would be of additional help.
Good luck and thank you for using FixYa.
Posted on May 11, 2009
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Posted on Jan 02, 2017
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