I've been wanting to try one of these for some time now after reading about them here on the forum. They are a nice, low cost, and very dependable substitute for the stock TCI coil. They can also be used with a Pamco or other electronic ignition that calls for a low ohm primary coil. These coils have a 3 ohm primary. The stock TCI coils are 2.5 ohms but all reports say these 3 ohm Honda coils work just fine. Even though the stock coil on my '83 seemed to be working OK, my main reason for the swap was so I could change the plug wires. You can't do that on a stock TCI coil because they're molded in.
So, I went eBay shopping. Eventually I found a bank of 3 coils from a Gold Wing 6 for about $24. I thought $8 a coil was pretty good. This was a complete assembly including plug wires and the connection pigtail .....
At the very least, you'll want to find one that includes the tower caps. They are smaller than the Yamaha points coil ones and won't swap .....
The Honda coil is physically smaller than the stock one in both length and height. The mounting lugs are also turned 90° compared to the original .....
That means adapter brackets are needed, and to mount the coil in a similar position to the original, they need to be angle brackets. Another issue I have with the stock coil is the way Yamaha mounted it. They angled the rear up and that jams the plug wires into the frame backbone tube .....
I was able to correct that with my custom mounting brackets, raising the front of the coil so the plug wires coming out the rear ran more parallel to the frame .....
So, I went eBay shopping. Eventually I found a bank of 3 coils from a Gold Wing 6 for about $24. I thought $8 a coil was pretty good. This was a complete assembly including plug wires and the connection pigtail .....

At the very least, you'll want to find one that includes the tower caps. They are smaller than the Yamaha points coil ones and won't swap .....

The Honda coil is physically smaller than the stock one in both length and height. The mounting lugs are also turned 90° compared to the original .....


That means adapter brackets are needed, and to mount the coil in a similar position to the original, they need to be angle brackets. Another issue I have with the stock coil is the way Yamaha mounted it. They angled the rear up and that jams the plug wires into the frame backbone tube .....


I was able to correct that with my custom mounting brackets, raising the front of the coil so the plug wires coming out the rear ran more parallel to the frame .....
