I called them "12 volt" coils because they are marked "12 volts." I pretty much just go by the total resistance in the primary circuit. There are plenty of later Harleys with the two-plug-per-cylinder conversion - but those started out with a different ignition to start with. Most are breakerless and some of those breakerless systems give instructions on how to wire them IF they are rated for the load of dual coils.
This bike is a 1968 and I can find no information on a system like this. If it was a 72 or newer, this would be easy to figure out.
I think we (consumers) are kind of spoiled when it comes to things like this since some engineer somewhere has hopefully already figured things out. I guess that is why tractor companies bought pre-designed ignition systems and did not create their own.
I am thinking now of just using one spark plug per cylinder and not using the extra plugs and 2nd coil. Points ignition, stock, calls for a 4 ohm coil and no ballast resistor with a 12 volt system. Seems kind of a shame to waste all the expensive machine work someone did before me to make this thing use dual plugs in each cylinder. That said, unless I see some actual test data somewhere, I find it hard to believe the extra plugs really make a difference in performance. But, I guess I could be wrong?
Upload one or more videos to your post. Photo and video filesizes should be less than 5MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Show Coverage: Central Illinois Strawberry Festival - by Cindy Ladage and Janna Seiz. Every year the coming of summer is highlighted by different events for different people. For some, it is heralded with the end of school, tilling the garden, or completion of the planting season. To us, connoisseurs of find food, antique tractors, farm toys, crafts, and downright fun, the annual Strawberry Festival means summer is here. Every year, in Carlinville, Illinois, the Macoupin County Historical Society and the Macoupin Agricultural Antique Association team up to fill th
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
