Re: what did you do to your motor bike today?
Not really surprising, motorcyclists talk about "throwing" a chain. my guess is that at highway speeds it can get thrown pretty far. I was buying a 420 chain at a motorcycle shop when I ended up in line with a guy buying one for his Suzuki 750. we commiserated about it being a rainy day and when we met again in the parking lot he saw my gas bike and said "Well sh!t, I would have just pedaled home!".
Roller chains used for garage door openers and security gates also throw chains but I imagine not as far.
Overall: even the low-end engines work fine. it is TRANSMISSION that causes all our problems.
Chains, chain tensioners and rag joints. These are the greatest flaws in Mr. Grube's design.