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Vibration...can't help you there. Without feeling it in person, there's no way to say "normal" or not. Hands going numb after an hour? Could have less to do with vibration than your grip--can't tell this sort of thing by 'remote control.'
Can you clarify the idle speed question, please? Do you mean it sometimes idles at 1000, other days around 1500? Or, one speed after first starting, the other later? Or, after it's warmed up, the idle 'hunts' back and forth between the two speeds?
None of these is particularly normal, but I'd be most concerned about the third. Throttle body imbalance and/or air leaks come to mind there.
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John
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