Triumph 1965 to 68 Timing hole PLUG screw 70-4706 BSA up to 1970 tach tachometer
Use this screw to substitute the output tach drive unit! Also this screw can be used for the crankcase timing hole! This nut has a right hand thread! Fits Triumph 350, 500 & 650 models (Bonneville, T120, Daytona, T90, Tiger, TR6, Trophy, TR6C & T100C) up to 1968.