Yep there’s a Kiwi with one with around 120,000km on his, checked the valves twice! And still in spec. Piston replaced twice. Second time after it was stolen in Alice Springs.Thing is, I would happily say a 500 exc, because service intervals for non-racing riding can be as long as you like within reason. But most people will not look beyond what the manual says.
Larger tank and cush hub, that would be my choice.