la JJCobas JY3 se derivava de la serie JC2, pero con una motorizacion Yamaha RD 350CC y todo el equipamiento necesario para poder circular por carretera. los materiales eran de primera calidad.
La JJCobas JY4 era la segunda version de carretera de la marca, estava construido con un chasis doble viga de aluminio con una motorizacion Yamaha TZR 250CC y se destino para el mercado Japones.
The JJCobas JY3 was developed from the JC2 series, but it was powered by a 350cc Yamaha
RD engine and included all the equipment needed to ride on the road. The materials were top quality.
The JJCobas JY4 was the second road version of the brand. It was built with an aluminum
double beam frame and it was powered by a 250cc Yamaha TRZ engine. It was targeted to the
Japanese market.