The Older Gentleman said...[QUOTE] The 500s ran their cranks. Regularly, frequently and expensively. *Two* bikes on the press launch (South Africa, 1984) blew up through crank failure, which should have been a warning.[/QUOTE] Two bikes on the press launch, and they were pre-production bikes. All those I know of survived many trouble-free miles. [QUOTE] The 400s - well, nobody ever bought them, so who knows?[/QUOTE] I owned one, and because of that discovered a few others around our way. I bought mine from a mate whose dad still owns and uses daily the one he bought the same week as mine was registered back in 1986. His bike's now a shed to look at, but he's had no mechanical problems at all.