Sounds like the electric starter relay has gone located in battery box. sqaure yellow box get a new one or take of yellow cover and there is a little paddle what moves when electric start button is pressed what makes the niose you coud'nt hear this has probaly gon stiff to check just turn on ignition and press paddle in with hand if it works just woble to loosen until it works with electric start button.
miggie
May 2014