I HAVE HAVE A 1971 CB750 K1 FRAME AND ENGINE , THAT WERE FOUND IN A BARN. THE FRAME HAS BEEN BLASTED TO SEE IF ANY PROBLEMS SHOWED. THE CENTRE STAND TUBE HAS TO BE REPAIRED , BUT EVERY THING ELSE SEEMS FINE. WHILST THE FRAME IS IN A BARE STATE CAN ANY ONE RECOMMEND ANY MODS OR BRACING . I HAVEN'T DECIDED ON A FINISH FOR THE BIKE, ORIGINAL, CAFE RACER ,TRACK BIKE ETC. BUT I WOULD HATE TO BUILD A BIKE , AND HAVE TO STRIP IT TO DO FRAME MODS.THE ENGINE WILL NOT REMAIN STOCK AND I FEEL MILD TWEAK IS IN ORDER, HENCE THE FRAME MODS. I AM COMPLETELY IN THE DARK ON THIS BIKE, SO ANY SUGGESTIONS ARE WELCOME. MANY THANKS, SLEAFORD.