I couldn't help posting the following on the VFT forum....
I have no problem with anybody wanting to build whatever they want, it's a big old world with a niche for almost anyone and their bike. What bothers me with this bike however is it being allowed to race in Pre 75. Let it race in Evo, pre 85 or whatever class allows Honda CR480's but to allow it in pre 75 is an insult to the racers who build legal pre 75 racers and who follow the reasons our sport exists in the first place. Vintage motocross exists on the pretence of replicating particular eras in our sports history, not as a dirt bike equivalent to fitting big block Chevy's into Toyota Corrollas.
That bike and the 'Megadeath' 750 Honda RF145 mentioned would be gladly allowed to race "downunder" here in Australia (and probably NZ) but only in a class deemed appropriate for the bikes modifications. Our rules would place the 480 bike in Pre 85 because the newest major component, i.e. the engine, is the defining factor in what division a bike competes.
I build and race very trick bikes but they're all built to conform to a set of standards based on particular era's of motocross history, not reinventing vintage motocross to suit some weird Dr Frankenstein vision.