Just put all new running gear & sliders on but have a problem with the looseness of the front drive sprocket. Is it just the 2 screw locking pline washer thingy or something else? i have 3 different manufacture new XR4 sprockets here & they all have way more lateral wobble movement that what iv'e ever noticed on my other bikes (even the old original 1 i took off does it too). Any suggestions before i order a new lock washer. Does anyone else have the same movement with their XR4?