hi thanks for the reply and thanks for moving the thread i have had another listen as i have just finished work and the thump has got worse and isnt in time with the engine speed and bottom end so i think it maybe the weight on the ballancer shaft that has come loose im going to now take a look at the schematic`s and then give a crankcase strip and look and have a look on Monday wish me look and any ideas in the meantime please share with me thanks , ash (can someone please point me in the area were i can post pictures and information on my sexy beast if there is such a place)