Originally Posted by 07superglide
So your trying to tell me that more spark dosent help with easier starting,smoother idle,better throttle response,better gas mileage? Its all a myth? Hmm wander why they even make them?
Don`t confuse an aftermarket ignition system
upgrade with a simple coil change.
An aftermarket system
can give the advantage of better advance curves etc. Which can certainly give you performance improvements.
However, an aftermarket coil will give you no better performance than the coil already on the bike (assuming it is working properly).
Don`t be fooled by advertising for a coil that produces 87 gazillion megawattvoltjoules.
For example, lets`s say your spark plugs require 20,000 volts to fire. The energy in the coil will rise until it reaches sufficient voltage to cause the spark to jump the gap, 20,000 volts. The stock coil in your ignition system is already capable of producing more than enough voltage to fire the plugs.
Now slap on that fancy expensive aftermarket coil.
Now when the engine is running, the voltage in the new coil will rise until it reaches sufficient energy to jump the gap at, you guessed it, 20,000 volts.
I`ve been an aviation mechanic since 1974. I was taught this in Airframe and Powerplant school by an old man that seemed to know what he was talking about.
The answer to your second question, see Jerry`s post.