I once had an 80cc motorcycle (first motorbike) and the chain broke, I was about 25 miles from home and the nearest town was 6 miles away, I wasn't going to abandon it so I pushed it up and down hills for the 6 miles and left it at a petrol station, the owner was quite ok about it, then I had to continue the walk home, thank goodness I was young and although pooped got home OK! but stuffed!
I wouldn't try it now but I still go on hikes covering 10 miles or so!
BTW, I still change my BMW motorcycle tyres by hand and balance them!
