To continue providing great service, a £5 (inc vat) surcharge applies to orders under £25(inc vat) to help cover fulfilment costs — thank you for your support.
THE LATER SMALLER NORTON O.H.V SINGLE VALVE SPRING SEAT 1 3/16" (30MM) OUTSIDE DIAMETER. 5/8" (16.1MM) BORE USED WITH THE SMALLER VALVE SPRING, FOUND 1959 ON.
SEE A3/148 FOR THE EARLIER LARGER SPRING SEAT.
© 2025 RGM Motors