hi im dave from middlesbrough been riding trials for 6 years now and had a sy 250 scorpa but recentley bought a 2004 beta rev3 and noticed that it has a slight rattle from the cylinder head i think its the piston and been told that its not that bad and that they can be ridden for months like that... the bike rides perfectly and hasnt let me down but just not sure about the noise can any 1 help?? Thanks dave