Back before the regs got tough I did a bit of modification on road frames. Won't even look at it now. Ironic that race stuff which is more highly stressed requires no certification whatsoever....
I seriously doubt if there's anyone formally qualified in NZ to do motorcycle frame structural analysis, and with enough experience to make it meaningful. On the other hand i know of about 5 people who can look at a frame and say yes or no....and none of them are formally qualified. Best welder I know has let his cert lapse...most of the car race teams in ChCh still use him though.
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