The accident in Monza in 1973, when Jarno Saarinen and Renzo Pasolini died and Walter Villa was seriously injured, caused further delay in the development of the project.
As soon as Villa recovered, he used the improved brake both on the Yamaha 250 and 350 he was using for racing.

One day I was surprised to receive from the Commendatore new indications that altered a lot the work carried out until then: the two flat discs had to be replaced by a conical shaped single disc.
I pulled up my sleeves and I began redesigning everything, no longer for a wire laced wheel but including the brake in a one piece casted wheel that somehow resembled that 5 spoke design that had been left unused for a long time.

The following year Villa was officially on Aermacchi- Harley Davidson 250 and 350 cc. (on which he won 4 world titles between 1974 and 1976) fitted with hydroconic Campagnolo brakes. Through the years, the brake reached good levels of functionality, it assured constant braking during the entire length of the race and it guaranteed good modularity in wet conditions. Other important riders such as Giacomo Agostini and Johnny Cecotto tested that brake but did not appreciate it. Only Walter Villa knew how to set it up to achieve the best performance.