Bike started missing and stumbling after 5 or 10 minutes of riding.
Thought it was carburetor so I thoroughly cleaned it. Same issue. Next time I tried to start it, it would not start at all.
I checked the coil with multimeter and got 4.0 on the primary and 0 reading on the secondary.
Not understanding why I got 0 reading on the secondary reading. Right before I took the coil off the bike I visually checked the spark and the right side looked okay and the left side looked very weak and intermittent.
Wouldn’t the fact that I had some spark, albeit weak, reason that I should get some type of reading from the secondary side.
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Vintage Honda Owners, Restorers, Riders and Admirers
1969 CA77 Coil
1969 CA77 Coil
S90 / CB550 / CA 77 Dream 305 / Yamaha RT2 360
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Tim Allman
- honda305.com Member
- Posts: 501
- Joined: Tue Dec 02, 2014 9:25 am
- Location: Guelph, Ontario, Canada
Re: 1969 CA77 Coil
To answer your question, yes, you should see much more resistance on the secondary coil if you are getting any spark at all. And, if the right side was giving a good spark but the left wasn't, it seems to me that there would have to be a problem with the left side connector, wire, cap or spark plug. After all, it's the same coil for both sides.
I have found that problems like this have causes and solutions that are obvious only after trying everything else. All I can suggest is to test all of the parts from the points and capacitor to the coil to the spark plugs. The wires are easily and cheaply replaced but I would use copper wires rather than the almost universal high resistance wires.
I have found that problems like this have causes and solutions that are obvious only after trying everything else. All I can suggest is to test all of the parts from the points and capacitor to the coil to the spark plugs. The wires are easily and cheaply replaced but I would use copper wires rather than the almost universal high resistance wires.