There must be a few sets of the standard rockers about that came from bikes converted to e.g. the Push rockers or later models to give 5.5" travel.
And it looks to have failed at the crest of the relieved section, relating the failure to the modification. Stress concentration at the reduced cross section and a fatigue crack propagating until the remaining ligament is overstressed and tears. The fracture surface would show this.
And it looks to have failed at the crest of the relieved section, relating the failure to the modification. Stress concentration at the reduced cross section and a fatigue crack propagating until the remaining ligament is overstressed and tears. The fracture surface would show this.