Thanks for the information. I have a new pair of Piper verniers, just have to decide whether it's worth fitting them so will check the current timing to see how far out it is. #6 Oily, just to clarify, are the figures you quoted for Supersport (1.6, year 2000, 135bhp) cams of 50/44 thou the ideal values for inlet/exhaust valves respectively at TDC? Thanks