i agree... AFAIK, there is nothing wrong with the sump... which is not saying much since it's just a depression for oil to sit... what could possibly be wrong with a bowl...?
He might be refering to where the pickups are located and the fact that if you where to wheelie for an extended period of time you could get oil starvation.
Then again he might have a friend who has a friend who has a gixxer who told him that 500R oil sumps suck.
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