Cool! I love the vintage Jap bikes. My wife and I ride that Z1 all over MN every summer. It's such a great bike, super reliable, comfortable, good power. It's almost all stock (mufflers) even original paint. Valves seem fine just needs new timing chain rollers and idlers they wore out letting the cams get out of time. No damage luckily.

By the way, I've got two friends that each own AMC's. One Javalin (spelling?) and one AMX. Both cars are pretty sweet.