21-1873 Crankcase Mouth Screw – 650ccc 1969on Crankcase Mouth Internal Screw as fitted to Triumph 650cc models from 1969 onwards. Thread: 1/4” UNC x 7/8” UH MADE IN ENGLAND OEM 21-1873, S1873
Restrictions This website is only intended for an adult audience. All models are 18 years of age or older. If you are under 18 years old (21 years old in some states), please leave immediately. No exceptions.