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Royal Star & Thunderbolt) from 1969-1972
They both have the same thread pitch (16TPI)
650 & 750 models from the 3TA
It is crucial to keep your Oil Tank clean at all times and this part will do just that
Amal Monobloc / Concentric Main Jets - Choose Size Size:#240 Royal Star & Thunderbolt) fromFor sale are new Amal main jets. All Amal main jets are 100% authentic and are made by the Amal factory in the UK. Our Amal main jets are suited for all Amal Monobloc carburetors and Amal MKI and MK1. 5 Concentric carburetors (375, 376, 389, 689, 626, 926, 928, 930, 932, etc) as fitted to most vintage Triumph, BSA, Norton, Matchless and AJS motorcycles. Amal main jets are both suited for 2 stroke and 4 stroke applications. Each Amal main jet has been