Heikki,
All standard ie 44mm carby, 4 speed gearbox, i changed the kickstarter to a later style to make it easier to start and put 83 wheels on it as the 82 nordisk rims are as soft as butter.
Magoo,
I know there are about 5 or 6 82.5 500 in OZ, i read somewhere that they only produced 200 worldwide as it was a prototype 500 motor in a 82 frame and developed for the 1983 season bikes, the power is by all reports brutal and was tamed down for the 83 model. I think you need your eyes and your scales checked i think i am a bit heavier than 50kgs
i wish i still did weigh that
, i would still be flapping off the back no matter what i weighted