The ELF 500 ROC was a motorcycle that competed in the 1996 and 1997 500 cc Road Racing World Championship.
The engine was housed in a frame designed by Serge Rosset's small ROC firm, based at Annemasse in France.
Sponsored by soft drink giant Pepsi, the team consisted of Adrian Bosshard and Juan Borja.
The bike would go on to record 8 point-scoring finishes out of 15 races, its highest placing being that of 8th by Borja at Donington Park.
The ELF team ceased GP competition at the end of 1997, but the bikes returned to the grid in 1998 in the form of the Muz 500.