Update: only 2 months on the newest swingarm and the same type of failure. With over a hundred hours of punishment I noticed a crack while doing my daily inspection. Pulled it in the shop, pulled the motor and...... the pic's pretty well tell the story!
I used much heavier steel this time and I'm still under-engineered- AGAIN!!! I'm getting pretty good with this failure!!!! I'll need to add many gussets to carry the load away from the welds.
![Dunno](images/smilies/dunno.gif)
I'm now trying to figure out why this occurs on this buggy and not on the Spiderbox- the major difference is their suspensions & of course chassis design. Back to the drawing board