I am an OLD four-stroke racer from the 50's and 60' however I need a 70 tooth rear sprocket for my 1961 250cc Greeves Hawkstone scrambler that I am setting up to ride observed trials at the vintage race meets.
I was with the original group that started Cycle World magazine in '62 and worked in the motorcycle industry for years before CW and afterwards also.
I was a Ram from Southern California for ten years, racing desert mostly. Still have the desire at 82. Jack Fullwood, Shelton, WA 360/426-0956 or firstname.lastname@example.org