Originally Posted by Wirespokes
Look at the land speed record that Burt Munro set on his 1920s Indian that still stands. But that's straight line stuff. He also won a lot of races on that old Indian before turning it into a Bonneville racer - and that was against new bikes.
That bike was a shadow of its former self and in no way resembled a 1921 Indian when he got done with it; at least not in terms of the powerplant. Another thing to consider is that although he did it in his shed, most of the stuff that he did, kept pace with what was being done to modern bikes of the day. He was just retrofitting it to an old Indian. He did a ton of redesign to the engine to get it up to snuff. No stock bike of that era ever had a hope of setting the kind of records that he achieved; no matter who the rider was.