I've done it on my 550 and it worked out well. There's a few more than 4 wires. You have to run a green wire down to the points. Then you basically take your wires going to the coils and go in to his box and then wires from his box to the coils. A tap into coil power and a ground and your done. He also shows an option for full power for max rpm performance which uses a big wire and bypases the kill switch. I plan to use a relay to do this and have my kill switch trigger the relay. I haven't done this yet but still it has smoothed out my bike plenty. I like the piece and his service is superior to anything out there. Give him a PM shout. Later!
