Disk brake conversion

TeddyG · Sep 18, 2023

I'm considering purchasing a 73 Commando and wondering what components others have used to fit a modern front disk caliper. I have axial mount Brembo calipers and master cylinder/lever from an Aprilia, but need to know what caliper mounting plate and aftermarket rotor will work. Thank you

Tornado · Sep 18, 2023

You will likely need a custom/homemade caliper bracket for you setup. Also, changing the MC means changing the switchgear on the right side handlebar.
Alternatively there are modern disk brake kits available, some of which keep oem switchgear, from different vendors for Comando.

See Colorado Norton Works or
Forum member Madass140's web page here for kits:

tritonmotorcycleparts.com

BruceB · Sep 27, 2023

I also recently went through this decision process and opted for the upgrade kit offered by tritonmotorcycleparts (Don Pender). The installation was very straightforward, everything fit beautifully, and you get to keep your existing switch gear.
In use, it has a nice progressive feel with two finger braking, and with a fistful you can lock the front wheel. It has transformed my riding experience. Highly recommend

And Don was very helpful and responsive to emails.

Stephen Hill · Sep 29, 2023

Does Don's upgraded master cylinder use a front brake switch?

Tornado · Sep 30, 2023

Stephen Hill said:
Does Don's upgraded master cylinder use a front brake switch?

Pretty sure it does as it is derived from a commonly available bike.
Try asking him direct in a PM to madass140.

Stephen Hill · Oct 1, 2023

I thought BruceB could answer this, as he installed one.

nortonmews · Oct 2, 2023

Yes, Don's conversion does have a brake light switch

BruceB · Oct 2, 2023

nortonmews said:
Yes, Don's conversion does have a brake light switch

Hi Stephen, yes Don's brake MC does have a brake switch. As the MC assembly is more compact than the OEM assembly you'll have to pull a bit more cable out from the headlight (if you have enough to spare), plus the spade connectors on the MC switch are of the narrower type, so you will have to replace the female connectors on the harness, or make up a pigtail. Lots of ways to accomplish it, but the main thing is that there is a switch and it's relatively easy to connect into the existing harness.