on the aesthetic side, the original fairing-free bike was changed into a street replica of the famous grand prix bikes on which giacomo agostini triumphed. this reworking gained the appreciation of the enthusiasts (including angelo bergamonti, who tested it on the occasion of a visit to cascina costa di tamburini) and the disapproval of count domenico agusta, who did not like these modifications of his machines. the revised motorbike weighed about 200 kg (24 kg less than the original 600) and its 69 bhp engine (compared to the 52 of the original "600 turismo") allowed it to exceed , with a clear improvement in performance even compared to the contemporary 750 s.