noise Hi guys I have a 13 yzf450 i just bought it well traded before trading it made no noise but all I did was ride up and down the road and on some hard pack dirt for 15 min or so. the guy ha 3 identical yzfs I picked this one so we traded my ktm 250 250sx spotless. The problem I'm having is yesterday I ran it half hour I changed the bad gas in it for av gas. The bike is making a noise like rocks inside only when in gear. The bike has rocket ship power. at stand still fine so it makes sound like rocks in the engine when rolling in gear runs perfect shifts perfect is my crank taking a shit. any idea what I could be.