The spokes on the 06 Scrambler break at the elbow. I tried heavier spokes from Buchanan but those broke, too. Sidecar use puts an awful load on the wheels. I finally replaced the rear wheel with one from a 2012 Thruxton model. It has an aluminum rim, but more importantly, the hub allows the spokes to be a straight pull design, eliminating the weak spot.

Thruxton Rear Wheel