Spark plug Champion N4CSet of 2Triumph 350, 500, 650 with Alloy head. BSA Twins with Alloy head. Ajs/Matchless Twins and Singles with Alloy head. Many other makes with long reach Alloy head.
BSA A7/A10 - Aloy Head
all AJS/Matchless
Alloy Head Model
1950-1966
Thread: 14mm
=NGK B6ES.B5ES AJS 33, 16C ExpertsAriel Leader, Arrow, Arrow Super Sport, Golden Arrow, Arrow 200BSA A7SS, A10RGS, A10RR, A10SR, A50, A50C, A50CC, A65, A65LC, A65R, A65T, B32 Alloy Head, B40SS90, Victor B44R, B44SS, Victor B44ET, B44GP, B44VS, C15SS80, Bantam D10, D14/4, D14/4SMatchless 1964 onwards, G3C Maestro, G3C Trials, G80 Major, G12 MajesticNorton 650 Dominator, 650 Mercury, 1964 onwards all other modelsRoyal Enfield 736cc InterceptorTriumph TR5 Trophy Alloy, TR5A, 6T Alloy, T100, T100S, T100T, T110 Alloy, 21 5 TA, T100A, TR7A, TR25, Tiger 90, TR6, T120 pre 1968, 1968 onwardsVelocette: MSS 500cc Alloy, Viper Sports, Viper Clubman, Venom Special, Venom Sports