1964 Matchless G12 CSR, 648cc. Registration number CTN 372B. Frame number overpainted A85338. Engine number G12 CSR 9573. Gearbox number MA 3294R.
The Matchless G12 CSR designation officially stood for "Competition/Sprung/Roadster," the same nomenclature used with the G80 and G50 models. With its distinctive two-into-one 'siamese' exhaust system and upgraded camshafts the CSR was a high-performance motorcycle with what was, at the time, a high compression ratio of 8.5:1, distinguishing it and the G12 CS from the other G12 models, having a 7.5:1 compression ratio. The factory diverted Chief Engineer Jack Williams from AJS 7R development to address the problems with leaks and vibration and modify the bikes for racing – with the result that Ron Langston and Don Chapman won the prestigious Thruxton 500 long-distance endurance race on the AJS Model 31 counterpart to the G12. Encouraged by this victory in 1963 the G12 CSR gained the name Monarch and twin carburettors (the AJS version was renamed the Hurricane).
CTN comes with an Owners Club dating certificate for dispatch in June 1963 to Newcastle on Tyne, confirming it is fully matching numbers.
Owned by Henry Black of Guisborough in July 1964 it stayed with him until Mick or Malcom Curnick owned it in 2001. Then comes John Deaville in 2013 who restored the machine, at this time he notes it was a genuine 28,000 miles and two owners. He kept copious notes on its time with him, including selling it to John Hadgson in 2018 .
Our vendor bought it in 2019 and has cheished its time with him.
Sold with the V5C, old MOT's from 1979 - 2001, many receipts for parts and work undertaken, magazine articles and other related paperwork. It should require only light recommissioning before road use.