I recently bought a '99 yz400f that has been converted to a wet sump system. Is this harder on the engine than the stock dry sump? How often should I change the oil? What is the oil capacity with the wet sump conversion? Does anyone make an aftermarket side cover that has an oil fill place. Should I convert it back to stock dry sump? If I wanted to convert it back what parts would I need? I know this is a lot of questions but any help would be appreciated.