friend of a friend put me on to steve at peak performance in exeter
http://www.peakperf.com/engine.htm what a top bloke!!
never really messed around from factory settings on bikes but at the end of the day i'm nearly 17 stone.
had a quick chat then he went to work, hour later after me sitting on / off and adjustments..- "see how that feels!"
fantastic!! made a huge improvement,and didn't break the bank..
anyone in southwest i would recommend a trip to see him.
not just for "heavier riders" he actually backed off the front!!