DUCATI CORSE SPECIAL REAR SUSPENSION LINKAGE- SPECIAL DESIGN MEANS  ONLY CENTRE NUT HAS TO BE TURNED IN EITHER DIRECTION TO EXTEND OR CONTRACT HOLE CENTRES ON BIKE FINE THREADS MEAN FINE ADJUSTMENT CRITICAL MEASUREMENTS ARE RANGE 145MM IN SHORTEST POSITION TO APPROX 160MM    AT 160MM HOLE CENTRES THERE IS APPROX 10MM ENGAGED IN BODY AT EITHER END  SO SOME LEEWAY .POSTAGE/PACKING/INSURANCE UK £5.00/EUROPE£15/AMERICAS£6/REST OF WORLD£17.