ITEM DESCRIPTION: 17mm Sprocket Retainer Plate Kits (includes bolts) for various 50-125cc Honda Chinese engines. NOTE: The 17mm plate is used on most 50-125cc Honda and Chinese engines. The 20mm plate is found in another listing and is used on many 100-350cc engines (There is some size overlap, so please measure your shaft to be sure you order the correct one). NOTE: The 17mm plate Replaces Honda Part # 23802-040-000 the 20mm plate Replaces Honda Part # 95014-92100. Honda models that may use the 17mm retainer: As always, carefully compare your old part to be sure you order the correct one. 2004 CB50R 1990 NS50F 2004 NSR50R 1988-1999 Z50R 1983-1984 CR60R 1978-1981 ATC70 1980-1982 C70 1977-1994 CT70 1997-1999 XR70R 1977-1979 XL75 1977 XR75 1980-1985 CR80R 2004-2012 CRF80F 1980-1985 XL80S 1979-2003 XR80 2004-2013 CRF100F 2006 NSF100 1979-1985 XL100S 1981-2003 XR100 Honda models that may use the 20mm retainer: As always, carefully compare your old part to be sure you order the correct one. 1977-1978 XL100 1980 CT110 1978-1985 CB125S 1977-1978 CR125M 1977 CT125 1977-1978 MT125R 1988-1989 NX125 1977-1985 XL125 1977 MR175 1977-1978 XL175 197-1979 CM185T 1979-1983 XL185 1979 XR185 1983-1985 ATC200X 1980-1982 CM200T 1986-1987 TLR200 1986-1988 TRX200SX 1983-1984 XL200R 1980-1988 XR200R 1982-1985 CM250 1985-1987 CMX250C 1984-1987 XL250R 1986-1988 XR250R 1983-1985 XR350R