Unit construction thumper that was quite modern back in ’58. Early engines had lube and poor metal problems, ’61 on better. Suspension needs upgrade to stop handling turning really nasty. The 14S was a touch faster and better styled. The 14CSR had a 20hp motor, butch styling, better suspension and exhibited a reasonable amount of development work, but rare. Better than BSA singles and quite cheap. Also known as Matchless G2.