u瞳秤 "Adjusting bolt"
Austin Healey: BN1, BN2 and 100M (1953-56) plus BN4 to engine no. 48862 (1956-57)
MG: TD from engine no. 9408 and all TF (1951-55) ? MGA (1955-62)
Triumph: TR2, TR3, TR3A and TR3B (1953-62) plus TR4 to chassis no. CT21470 (1961-63)
Sprite / Midget: Sprite I to HAN5-50116 (1958-61)
fast idle