Triumph / BSA Unit Singles "Duplex" Primary Chains (1) - B25 / C25 / B44 / B50 / Etc - Choose Brand / Application Part # - Specs:60-0951 / 60-951 - (C15 / B25 / B40 / C25 / TR25W) - 1959-73 - Renold (England) etc) up to approx 1962

etc) up to approx 1962

Etc) from 1969-1970

I consider them better than "OEM"

(inside diameter) come undersized so you can properly ream / hone to fit new or used (worn) cams

Triumph / BSA Unit Singles "Duplex" Primary Chains (1) - B25 / C25 / B44 / B50 / Etc - Choose Brand / Application Part # - Specs:60-0951 / 60-951 - (C15 / B25 / B40 / C25 / TR25W) - 1959-73 - Renold (England) etc) up to approx 1962Is your primary unit single primary chain stretched or worn? Replace it today with our high quality primary chains we have to offer. Choose from Renold & KCM brand chains We stock primary chains to fit all Triumph and BSA unit singles (excluding the Cub) from 1959 1973 from the C15, B40, C25, TR25W, B25, etc. We also stock a primary chain for TR5MX, B44 & B50 models from 1966 1973. Please keep in mind that 250 & 350 models use a 70L chain while 441 &