thanks for all your feedback,

funny thing is that this morning i pulled the wire off the amal valve coz it was running in at 18 psi!, so now its running around 9 psi and the noise isnt as loud, if its there at all!, sounds alot better than it did, strange, the amal valve is brand new, i know they click on start up, isnt that though!, deffo in the head!.

ill get a new cam anyway just incase!.