I would agree with Planenut. In my experience in a hot climate, the M3W just does not run properly with the original heavily baffled exhausts. They force too much of the hot exhaust gas to remain in the engine. My cylinder head temperatures with the original exhausts were 180-190ºC in hot weather (south of France). Since fitting G56 exhausts, not only have I cured the dreadful pinking but the cylinder head temperatures have dropped to 130-140ºC, next to the stacks. Improved Centa - I am not wholly convinced. There might be a tad less clattering than the original but I still feel there is far too much vibration. I rode pillion one of the Porsche engined V Rod bikes just round the village last week and the vibration level was a fraction of what the S&S makes. I think this would have been a far better engine for the M3W.
Wilson
