Often times during an engine rebuild you might find that your gear box thrust washer dowel is missing, bent or "rounded off" to where you have no choice but to replace. This dowel pin is vital in keeping your needle bearing thrust washer from spinning and also your bushing.
Pin is ground and measures .124" (OD) x .250" (long).. comes with a nice lead-in to aide installing. Fits most Triumph twins (pre-unit and unit) models as well as many single cylinder models. May also fit various BSA motorcycles as well. Check your parts book to ensure the best fitment.