can anyone explain how to do this?

ive lost my hanyes manual

I thought I had done it, but giving it a turn with the spanner for a safety check i think the valve and piston could be touching

cheers

 

iirc... the mark on the bottom pulley should be on the 0 mark on the bottom cover, the cam belt pulley should have the arrow on it inline with the mark on the head and the rotor arm should be pointing to the number 1 on the dizzy if the rotor arm is pointin to number 4 remove the cambelt and rotate the crank 360 degrees refit cambelt and the rotor arm should be pointing towards number one lead on the dizzy

 

iirc... the mark on the bottom pulley should be on the 0 mark on the bottom cover, the cam belt pulley should have the arrow on it inline with the mark on the head and the rotor arm should be pointing to the number 1 on the dizzy if the rotor arm is pointin to number 4 remove the cambelt and rotate the crank 360 degrees refit cambelt and the rotor arm should be pointing towards number one on the dizzy