Conversion kit for STM Evoluzione 90mm Slipper clutches (with either standard 12 or 48 tooth basket) Kit contains the 25mm nut and 3 other parts required to fit existing STM evoluzione 90mm slipper clutches from Ducatis with 20mm thread (e.g. 916/996/998, Monster. SS etc ) to bikes with 25mm thread (e.g. 1098/1198/hypermotard etc) NB: Afaik This is only for earlier design (pre 2009 i believe) STM Evo clutches that have spider springs. NOT the later design with the round primary spring but please check and or PM if you have any questions The Kit part number is STM KDU-S020 £ 50 + postage
