Merci beaucoup, Pierre.
Mais mon mien à moi, je l'ai trouvé dans Cycle World, livraison de juin 1965. Ça disait :
« A.C.A. WILLOW SPRINGS ROAD RACE – Ninety-six professional road racers turned out for the A.C.A. season opener at Willow Springs, California, bringing with them a total of 130 machines. But at the end of a fine day’s racing, one rider and two machines stood out in everyone’s mind — Haruo Koshino and the fantastic 50cc and 125cc factory Suzuki rotary valve twins (reported in detail elsewhere in this issue). Works rider Koshino, just over from Japan for the U.S.G.P. at Daytona, completely outclassed his opposition in the 50cc division, went on to lap the field in the 125cc class, and finished second to Tony Murphy in the 250cc class. The superiority of true factory machinery as compared to production models was never more evident.
The growing popularity of road racing in Southern California brought more competitors in all classes, and more spectators to watch them dice their way around the exacting Willow Springs course. A rather high accident rate accompanied the accelerated pace, though no really serious injuries resulted. Fine individual performances dotted the day’s activities. Norton Manx mounted Ron Grant was impressive in beating back Buddy Parriott for 500cc class honors, and Tony Murphy took a double victory — first in the 250cc race and then, despite all Eric Dahlstrom and his Honda could do, winning the 350cc event on the same Yamaha TD-1B. »
Soit deux victoires de Kosjhino, deux de Tony Murphy et une de Ron Grant.
Frank Scurria s’y était blessé, dirait-on à lire CW 1/06.
Bon, c’était peut-être en fin 1964. Mais ce serait bien tardif, comme recension.