This in Spanish. if you don't understand, put ear plugs on, and imagine what it says
Hope I can help with a traduction of the video::
First he talks very good of the Yamaha SuperTenere, being a great bike. and he comments that it is better to have the bike running with the original coils so he procedes to do some maintenance and that is what the video is about.
He says that the coil my have some spark problems at the bottom where the coil conects to the spark plug so what he does is he says that the Yamaha coil is very good and he recomends to do a cleaning process so that is what he shows in the video.
After the coil is removed from the engine prepair to disassembly
He starts removing the top and bottom rubber.
Then he removes the two metalic sleves (be carefull on how he dose it, he uses some kind of knives, so be carefull because you do not want to cut your self) , he says that you might see some rust in the interior, he recomends to use a 360 sand paper in the interior to get rid of the rust.
Affter it is being done he suggests to paint them with paint spray.
He says that due to the rust you might have a spark in the wrong place and not through the spark plug, reason to have misfire!
Then you clean the rubber portion of the coil very well and/ or rust left from the tubes being previously removed.
As a next step you use dielectric grease to cover the tubes interior, and put back the tubes to the coil.
Then put the rubber parts back in to the coil and remove the 4 points as shown to cover the coil with electric tape to assure there is a complete seal in the coil body and giving an 2 or 3 extra tape turns at the top to cover and assure is complete seal, bcause water intrusion is what causes the problem so water intrussion needs to be avoided..
Finally you put the top seal to assure there is a complete seal in the engine when the coil is located in the engineby having the extra electric tape covers at the top you will assure a better seal to avoig getting water in to the coil body.
Doing this process is a recomendation when you experience some spark issues with your engine, and he says that it shoul last for some extra miles and the coil life can be extended.
Hope is understandable and helps some of you to see what kind of maintenance can be done to the coils.
(I hope the spelling and wording will be good enogh to understand the video)
Have a great day to all!