Front sprocket bodge...
Posted this tip ages ago when it first happened, before this sub-section existed. It's still a handy thing to know!
All hail WD40 lids.
I was unfortunate enough to have the retaining nut and lock washer on my Yamaha XT 600, part company with the bike somewhere in the outback of Australia. In order to get to Cairns (where I could get a replacement), without the front sprocket parting company with the bike in a messy and rather dangerous manner, I came up with this:
It's the top from my WD40 can and a couple of cable ties.
Cable ties. I'd vote for them for Prime Minister if they'd only run for office.