Big waste of time, unless you plan on modding the hell out of your motor.
You need to determine what your Ignition Coil Reserve Voltage is. That, and Spark Plug Firing Voltage are what's important.
Ignition Coil Output Voltage: How much energy your coil is jamming out, no plug in the plug cap. Most modern bike and quad ignition systems are at or over 40k Volts.
Spark Plug Firing Voltage: How much voltage is required to fire the plug, with it properly installed, in a running engine. Again, most modern systems require 6k~10k Volts to fire the plug.
Ignition Coil Reserve Voltage: how much voltage you have left over, between what it takes to fire the coil (coil output) and how much it takes to fire the plug. In a properly operating ignition system, the Plug Firing Voltage should NOT be more than 1/3 the Coil Output Voltage.
To make it really easy, let's just use 30k Volts.
Ignition Coil Output Voltage = 30k Volts
Spark Plug Firing Voltage = 10k Volts
Ignition Coil Reserve Voltage will = 20k Volts.
That's an example right there that's right AT that 1/3 limit. If you made any motor changes, you'd need to look at the ignition system for possible modifications, depending on what motor mods you made.
Here are a few things that INCREASE your Spark Plug Firing Voltage (and eat into that buffer of Ignition Coil Reserve Voltage):
- Increased Compression
- Wrong heat range of spark plug
- Too large of a spark plug gap
- Wrong octane fuel, for what you're running
- Poorly maintained motor, with deposits in the combustion chamber and on valves
- Improper jetting, be it lean or rich, will affect Plug Firing Voltage, too, but they both have different effects
So, let's look at this ignition system rig you want to build. Let's say you can increase your Coil Output Voltage to 60k Volts. Let's also say it only takes 10k Volts to fire your plug. Let's say your stock Coil Output Voltage was 40k Volts.
On the stock system, you made 40k V, you needed 10k V to fire the plug, and you had a Reserve Voltage of 30k V.
You make a system that now puts 60k V out of the coil. It still only takes 10k V to fire your plug, and your Reserve Voltage has been increased to 50k V. That doesn't help you at all. It doesn't make your plug fire hotter, faster, longer, or anything else. Your plug is only going to need and use what it has to in order to spark across that gap. Everything else is dissipated into the cylinder head.
Fabbing up a system like that would only allow you to make mods that affect Plug Firing Voltage, without crossing the 1/3 rule into the Reserve Voltage. Easiest thing to do would be to open up the gap, and hope for a bigger spark. That's all experimental for you, though, unless you've got the stuff to test those three voltage outputs.