4x Keyster carburetor repair kit fits Suzuki GS 550 1977-1980 Gs550 GS550D Carburettor technology from Japanese production for all common carburettor models. Includes Keyster replacement parts "Made in Japan" in OEM quality. Content (OEM references are just shown for checking compatibilty!): 4x chamber gasket - Keyster = YFCG-27 - OEM = 13251-43010 4x top gasket - Keyster = M-43 - OEM = 13266-43010 4x float valve set - Keyster = KYV-03023 - OEM = 13370-18111 4x mixture screw set - Keyster = K-839SS - OEM = 13269-49020 4x air adjust screw - Keyster = K-643 4x jet needle #Y64 = 5DL36 - Keyster = KYJ-0064 - OEM = 13383-45030 .