Howdy everyone!

Finally got some free time to work on my bikes and was able to get my RT1 running! She took a sec but actually ran decent.

I noticed while trying to start it up that the coil that came with the bike is old and the lead for the spark plug wire is moving inside the housing and giving me intermittent spark.

Has anyone used one of the eBay replacements or have another recommendation? Thanks y’all!

On some models you can change just the wire I’m not sure on the RT1 been a long time if it has the screw in cap you can 

Picture worth 1000 words.


As HT1 has said, if it has a screw down lead cap like the one here, you can remove the cap, unscrew the lead, cut a 1 /4" from the end and screw it back in.  Coils like this were common probably up to the mid 1970s.
Once you have the lead screwed back on, it is best practice to smear the cap threads, the lead where the cap fits over and the cap o ring or rubber seal with a generous amount of dielectric grease.




If it looks like this later type one, it is a sealed unit and replacement is the only way.  Canny manufacturers realised that HT lead manufacturers were selling a lot of aftermarket HT lead, but the coil makers were not selling many aftermarket at all.  Of course they said it kept moisture out better....