Originally Posted by XTwarrior
Was wondering, does everyone else's XT550 topend sound like it is being starved of oil all the time? I don't know how to describe it well, but my top end makes what seems to be the sound that poorly lubricated cams would make, minus any scratchy or squeaking sounds. I'd almost say knocking but I know my engine is jetted rich so it shouldn't be knocking, and the engine is stock minus a pipe and a jet kit. The noise doesn't get better or worse with warming up.
I'm worried maybe somehow a line is clogged or my oil pump could be bad? Can I test the oil pump in any way?
You can loosen the small screw on top of the oilfilter lid, the oil should squirt out of there when the bike is running...