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BMW 1979 R100RT Changing Coils And Plug Wires for Dual Plugs

  Рет қаралды 1,168

Richard Ryer

Richard Ryer

Жыл бұрын

My motorcycle has been modified for a dual plug conversion. During a recent project it was noted that one of the Dynatech coils had developed a crack in the epoxy casing. The coils are 40 years old so case failure was not a surprise. The coils still worked fine, but out of caution I decided to replace the coils and spark plug wires. Now was a good time for such a project. I contacted Euro MotoElectrics and sourced two EnduraLast coils and two spark plug wire kits. Weather improved to provide a sunny day, so I went out to the garage and switched out the coils and wires. This video is a record of what I did to successfully perform the service. I am an enthusiast, so please view this video as a record of what I did. Thanks for visiting.

Пікірлер: 6
@ianbestor1528
@ianbestor1528 5 ай бұрын
Thanks for this. I just replaced the original pair on my 81 R100T with the single 3 coil and started up once, now can't get it to start. Only difference I did is not apply dielectic grease yet. Replaced spark plugs too.
@richardryer3412
@richardryer3412 5 ай бұрын
Hello Ian, Glad you visited and watched my coil replacement video. Sorry to hear the motorcycle won't restart after the first successful start. Check to see if you are getting spark to the plugs. Don't pull the plug wire from the plug and see if a spark jumps. That's hard on the ignition system and can burn things up. If you have an inductance type timing light you check the flash to the fly wheel when the engine turns over. Check both plug wires for a signal. If you don't have a timing light, you can unscrew a plug and hold the spark plug body against the cylinder or head and see if a spark jumps the electrode gap. If there's no spark something is wrong in the electrics. If there is spark, check fuel and timing. You can also check the wire that comes up from the points to the coil. Mine was old and falling apart. The boys at EuroMoto Electrics might be able to help you with trouble shooting. Good Luck. Cheers, Rich. Be SAFE out there!
@ianbestor1528
@ianbestor1528 5 ай бұрын
@@richardryer3412 Hey, thanks for the quick reply! Turns out the Bean can wire was pinched between the front motor cover and motor. I took off the Front cover, noticed it was pinched in two places, massaged the wire and she started right up! Thanks again.
@richardryer3412
@richardryer3412 5 ай бұрын
@@ianbestor1528That was a simple recovery. Once upon a time MAX BMW showed they had that wire for sale. I ordered one and it seems they didn't really have one and BMW no longer makes them. A month or so later a wire showed up in the mail. They had found someone with the OEM connections, wire and heat shrink that could faithfully reproduce the original wire. I don't know if they still can do that, but I bet there are a lot of RT owners with the same problems you and I experienced. Good job. Cheers, Rich. Be SAFE out there!
@Claytonhill85
@Claytonhill85 Жыл бұрын
How do you like the dual plug conversion? Thanks
@richardryer3412
@richardryer3412 Жыл бұрын
Hi Clayton, Sorry for the delayed response. The dual plug conversion did help with gas mileage. Overtime, the biggest affect on gas mileage was the degradation of the Bing carbs performance. After I had Bing rebuild the carbs, the mileage jumped way up. Overall, I think there was a small improvement in gas mileage per gallon. The dual plug system puts less voltage through the points so they don't burn very much at all. With the dual plugs on each side, if one side or the other dies, you can pull a plug wire from the functioning side and put it on one of the plugs on the dead side to get both cylinders firing again. And timing is only changed a little. It is very maintenance free and reliable, so I like it. The bottom plugs are shorter threads because the head has less material to put threads in to. As a result I believe you have to be much more careful when changing plugs so that you don't strip out the plug threads on the bottom side of the head. If I had to do it again, I probably wouldn't do it, But having done it gave me a little boost in performance and good reliability. It has been fine for 375,000 miles. Thanks for dropping by. Have a great summer, keep the rubber side down and be SAFE! Cheers, Rich
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