there will be a mark in the centre or at both sides of the cam pulley that line up with a mark on the head and there will be a t and f mark on the crankshafts rotor thats lines up with a hole in the case usually with a plug in it line up the T mark on the rotor and see what the marks are like in the head and on the cam pulley it will be quite obvious.they should be set with the cam chain adjuster in as any slack may well put the timing out when the chain is tensioned of course you will have to undo the tensioner to move the chain around on the cam pulley if it looks like its not set right.
adam bike doctor(of milton keynes motorcycle centre), December 2010
