YZ 250 actually, what a helluva bike. This was in 1981 so the 250 was still quite a strong bike then. I had the most fun in this sport (moto)that is for sure.

Anyway, of all the sports I have participated in Cycling has brought me to my knees more often after maximum effort. My most memorable bike trek was an 87 mile mountain bike ride on forest service roads in North Carolina. I could barely walk for several days after that. More than half of that ride was up hill.

Water skiing, Motocross, Rock climbing, Powerlifting, and Treking all are were challenges in their own right but cycling has to be the one I have been able to punish myself worse with. Powerlifting would be second for me since I would often leave the gym barely able to lift my arms or walk if it was leg day.

Everyone will have different opinions on this but personal experience is an eye opener like no other.