2002 sportster 12 evolution,doesnt keep spark to plugs, the 02 model is suposed to have the ignition module under the side plate.i think its under the seat.have cleaned the battery cables replaced the coil and checked the wires at the kill switch. any sugestions without just paying $235.00 to hope its the right part

Harley has been moving things around since 2000 and it makes life tough for people that do what I do. Try to fix bikes over a computer. I used to tell people that I couldn't fix a bike over the phone. LOL

On your bike, I don't know of any way to test the ignition module. Harley has a way to do it if you use a meter exactly like the one they use but I have never seen one of their meters.

Before you spend a lot of money on a new unit, first check your ground on the unit. Check the plug on the unit. It's also got a cam position sensor in the timer cavity on the left side of the engine as best as I can remember. This part is a lot less expensive but I'd rather solve the problem and replace a part rather than replace parts until I solved the problem.

I'd go to the auto parts store and buy a set of Autolite 4164 spark plugs and try those. The two best brands of plugs in my opinion are Autolite's and NGK's. Not those expensive copper or titanium or whatever they are plugs. Those things are made of auto engines that are running a lot hotter ignition system than your Harley is running. In an air cooled motorcycle, the cheaper the plug, the better they run. Don't waste money on the expensive plugs.

Try that, at least it's cheap. If it doesn't work, start checking connections. I'll say this, when a solid state ignition unit it working, it works. When one stops working it's usually for good. They very rarely stop then start back. Look for that loose connection.

Good Luck
Steve