Yes I know, John. I sent an email to Rick Doherty in the US the inventor of the Evo class. He responded very quickly and told me that a modified 480 was not an Evo bike. Modified bikes Hondas and Suzuki and even early on some Yamahas are legal in the Twin Shock series in the UK. I believe this class was invented by Bill Brown, it helped him sell a lot of Maicos. I have now scaned over the others posts I and now realise this is someone version of fun. Stir up some discussion and see how much response you can get.
Anyway please built your bike, but first make sure you are recognised as a bike manufacturer, design and build the bike from scratch. If you comply with this it could be recognised as eligible for Evo class. Also build it for the 500 class because no matter what you do it still won't be as good as the best 500 Motocrosser ever built, the mighty Maico 490.
I'm buying a postie bike next week for Evo 125 class, does anyone make an alloy swingarm and can I get Ohlins to fit.
Kevin