On a recent ride, my aftermarket fuel screw fell out and my bike (06 450) started running horrible. I look down and find the screw lying on the case, with the spring. So I clean it off and put it back in. Things are working normal. Is it possible that I lost the little washer and o-ring and the bike still runs OK? I find it hard to believe that it would have stayed in with the motor running and me riding. Thanks.