
Originally Posted by
Edbear
Mine would do 72mph with me lying on the tank, but practical cruising was about 50mph.
After a bit of work I would cruise my B31 at 70mph with standard gearing.With all the people racing B31's and 33's,Goldstar cams and pistons must be available after market.Cams,piston,some head work and a carb and exhaust and you have a cast iron Goldstar.I think a swing arm B31 or B33 is the way to go - you get a good handling frame,good gearbox,and all the 650 frame parts to use....and enough stuff to fiddle with the engine to keep you happy for years.Adapt a Triumph clutch (all you need is the hub to fit the BSA mainshaft),a modern ignition system and solid state generator and it would be an everyday bike.
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