[gasgasandrew]

HI have read many members with 2 stroke gasgas bikes with a rattle that seems to come and go my 07 ec250 does this on open trails [ ITS NOT CHAIN SLAP] what i have fould is there seems to be a lot of clearance in the power valve and at steedy speed the center flap slapes from side to side at just the right revs may be pulse in pipe what I would like to no is this a problem or do i just leave it alone as its very hard to get it to do it it just happens now and then at these revs or can i space the outer bearings to close up this clearance as i can close it up by pushing in the left hand bearing under ther power cover any help would be great