Train Piston Problem

I built a side rod piston from Percy the small engine, but it stop and stuck at the rail point. So, look:

I can’t adjust the limit of the angle? So, why side rods should be working it?

cancollide off and make it separate from the wheels so they dont affect eachother

I already have turned off the CanCollide property and the side rods didn’t work properly. So, can you show it in the workspace?