The YZf426 is the only bike that really scared me in the bush. Nephew had one as a sponsored rider, a box of go faster bits the size of the bike came with it. No idea what it was putting out but I spent an hour on it. It was ridiculously powerful. Suspension was crazy stiff unless you were pushing really really hard. When I finished I couldn't stand up. Next day I ached all over. He went from an RM125 then YZ250 to a YZf400 then this. After the 426 he had a WR450 which I loved and #1 now has one. Such a great bike. The RM was good and you could just wrench the throttle open any where, the 250 was a bit meh, not as good at all. Lots of old stuff too, the ancient YZs which were impossible for me to ride fast, just too heavy and the frames were rubbish compared to new stuff.
Ridden a few road bikes, RSR Aprillias, R6 and R1s and was thinking about a GS1250R, well the GS1300R M but too too too many dollars. Always worried about getting pulled over on the road bikes but they can't suspend a licence you don't have... I think.
I filled in and had a play on a sidebar at the speedway and had somevrides on a slider. Lots of fun but we weren't going flat out, just tuning the thing.
My dirt riding though was much tamer, I will dig out some trials stuff from the archives.