Thanks...... appreciated........I had naively hoped I could avoid the mysteries of tune ecu...but this looks unlikely now.
It's that low speed snatch that irritates.
There's a chap on the RAT forum reckons on reducing this by reducing final chain slack to 13-15mm ( whatever a millimetre is..damn foreigners)....sounds a bit radical to me...anyone here tried it? If so, do you still have an intact crankcase?
