when I had my ex DR350, I tried to renovate the forks .. but they just ended up the same, despite new oil, seals, bushes, .. the rear shock basically had no rebound, and I could not afford to change it. .. it also needed a new exhaust .. the brakes were shite .. and I did manage to improve them a fair bit with new pistons, pads, pins etc .. but they were still not `acceptable` for the road, at least, as it was capable of a fair turn of speed, 80 easy. .. o .. and the frame was shite looking too, despite frequent cleans. (incidentally, the MT21's , matched with the DR were awesome on rock and easy trails.)
ideally I would have liked that engine in a lower height frame, similar to the Alp4, but with a bit stronger frame, and ohlins u/d? front and long travel ohlins at the rear, with brembos too. Maybe a longer swing arm, but shorter frame? and a high undercarriage? If I had the skills and dosh and resources, I would try to build one
... now what tyres would I buy .. mmm ?