from what i´m learning the hard way is, if you blow a camshaft bushing and it warbles the camcover you need a new cover. When you replace a cover on this bike you must have the crankcase side to have them both line bored to match each other. That means an entire engine rebuild. My story is already not a good one with this bike. And now its getting worse. Pretty sure I have a good parts bike now. Many of the wrong parts have been replaced already.