This is a top quality starter clutch repair kit from Japanese OEM manufacturer TourMax. Depending on the bike they can be easy to fit. Fitting them to a Z1 series bike is a piece of cake providing you have a to remove the alternator rotor. On a Z650 not so easy. The kit comes with 3off springs 92081-110, 3off plugs 92043-087 & 3off hardened rollers 92122-001.This kit fits a massive number of Kawasaki bikes EN450, EN500, ER500, GPZ500, GPZ750, GPZ750 Turbo, GPZ900R, GT750, KLE500, Z400 twin, Z440, Z650, Z750 Twins & Fours, Z1300, Z1, Z1A, Z1B, Z900A4, Z1000 (All classics) & ZR750 ZephyrIt is also used by a number of classic Hondas including 750/900 fours and CXs and many GS/GSX Suzukis