Whether you have a street, touring or race bike, the powerful sparks of the MSD MC-3 Ignition will improve your motorcycle’s overall driveability through complete combustion of the fuel mixture. If your engine is equipped with sensitive multiple carbs, the MC-3 will help in case the carbs are not perfectly synchronized.
Not only does the MC-3 produce high output sparks, but it also fires the spark plug multiple times to ensure combustion and prevent plug fouling. Unlike the stock ignition which fires the plug only once on the combustion stroke, the MC-3 uses state of the art digital technology to deliver a series of hot multiple sparks at low speed where poor fuel atomization occurs. This envelope of sparks (up to 10 at idle) quickens starting, smooths out the idle and improves off-line throttle response.
A high speed RISC microprocessor accurately keeps tabs on the rpm, rev limits and timing of the ignition. The MC-3 accepts trigger signals from the stock ignition so you can retain the factory ignition curve, or for racing applications, hall effect pickups can also be used. The MC-3 Ignition can be used on single, two or 4-cylinder motorcycles using single or dual output coils with points or amplifier triggering.
The MC-3 features MSD’s proven Soft Touch Rev Control. By setting an rpm limit you can protect the engine from overrev damage due to missed shifts or broken drivetrain. While in the rev limit mode, the Soft Touch Rev Control randomly drops the sparks to the cylinders while refiring the same cylinder on the next engine revolution to prevent any fuel loading up. This method of rev control produces the smoothest form of rev control available! The rpm limit is adjusted with plug-in modules and the MC-3 is supplied with a 10,000, 11,000 and 12,000 RPM Module. Other modules are available on page 17.
Two Step Module Selector
This feature allows you to set two rpm limits; one for top end overrev protection and the other to set a launch rpm limit. Setting an rpm limit while you’re staged and waiting for the green light will keep your holeshots consistent and quick.
Air Shifter Ignition Interrupt
This feature produces smooth, backfire free shifts with automated air shifters. By wiring this circuit to the shifter, the ignition output is momentarily disabled whenever the shifter is activated. This safely unloads the transmission for lightning quick shifts with no backfires!
The MC-3 makes it convenient to time your engine with a built-in LED on the side. When a triggering event occurs, the LED lights up - perfect for timing your engine on the bench! It's also great for trouble-shooting ignition problems.
MSD's popular 2-Step Module Selector is now built-in on the MC-3 Digital Ignition. The 2-step allows the rev control to be switched between two different RPM Modules. The low RPM slot could be used for staging at the start line, while the high RPM slot could be used for top end rpm rev limiting.
Adapter Harness
MC-3 to MC-1 or 2 (PN 42112)
In applications where an MSD MC-1 or MC-2 ignition was used, this harness allows for an MC-3 Ignition to plug directly into the existing harness.
Two Step Module Selector
MC-3 Pro