Motogadget M-Unit V.2

When building any custom bike, the stock electrics and wiring are a problem. In our case a very serious one, because the K1100LT is an old touring motorcycle with a fuel-injected engine, ABS, a complex dashboard and many systems, from heated grips to an automatic windscreen lift. Most of the systems aren't needed for our project and must be removed.

The task

• Remove all the plastic relay boxes, which really spoil the look of the motorcycle.
• Move the battery to the tail so it can't be seen, since it doesn't belong in the project's design.
• Hide the Motronic engine control unit and its wiring under the tail or the tank.
• Leave only the ignition wires as visible wiring.

Completely removing the ABS system with its control unit and relays frees up the wiring and space significantly, but not enough. The main problem is the box of relays and controllers under the seat. The only way to get rid of it is to replace it with a Motogadget M-Unit V.2 digital control unit.

• This unit includes fuses for all systems against overvoltage and reverse polarity, which lets you remove the fuse box.
• It fully controls the lights from the buttons, which lets you remove lots of relays and the signal control unit and significantly reduce the wiring harnesses.
• It has a brake light and starter control program: you can connect the brake switches and the starter solenoid directly, which shrinks the harness.
• It's designed for Motogadget push-button switch blocks but can also work with toggle switches; we chose the push-button option, since Harley-Davidson switch blocks seem the best to us, and turn signals operated by buttons the most convenient.
• It meets safety certifications and is protected against moisture, vibration and high temperature.
• It has a built-in programmable shutdown system, for example in case the motorcycle falls over.
• It lets you program button sensitivity and signal brightness.

Before installing the unit on the motorcycle, we decided to first understand the wiring diagram in detail and how the device works with Motogadget switch blocks. The kit includes detailed instructions, but without experimenting it's hard to imagine what the wiring will look like with the new control unit. The device really did let us remove all the relays, fuses and controllers except the starter solenoid, the fan relay (controlled by the Motronic) and the ignition relay (controlled by the Motronic).

The instructions have information on the wires for connecting buttons and systems. To avoid mistakes, we will use the stock wires that went to the various consumers. The motorcycle uses high-quality German wires, strong and flexible; we're not sure we could buy better anywhere.

Watch the detailed video on how the M-Unit works below. We hope it answers all remaining questions and clarifies things!