Hi, I’ve previously built motor mounts for these Matrix Pro ii trucks, as you can see in the build log here, but they failed on me after 20 or so rides. The zinc angled brackets both cracked and fell apart, and I decided rather than sticking with that design, I’d make totally new mounts, and also make a new drive train with much shorter 15mm HTD5 belts instead of the unusually long 9mm XL belts I was using.
So I’m designing the new mounts, and thought I’d ask to see if anyone had any ideas before I start building. I have two aluminium bars, one 1/2 inch thick and one 1/4 inch. So I thought I would do something like this, half inch thick on the left, 1/4 inch on the right (rough sketch):
The left piece would be clamped on to the truck with the two M5 bolts, and then the right would be bolted to that with M5 bolts in the two slots, top and bottom.
The center truck hole would be filed as close as possible to the MBS truck profile. The right piece would have a larger hole, to allow for adjustment for belt tensioning.
Seems like it might work?