hahaha amjad bhai i wanted to say that their designs are copied not the engines, i know suzuki and honda engines have their own class.
please see raider and pridor front mud gaurds their side covers their seats and their back light design all are junoons copy.
i am also fan of suzuki but raidor's looks were very cheep from back and front like chinees bikes but engine wise suzuki is very good...
do you know!!! honda has done nothing in engine except increased the size of CD70 engine, same piston head same clutch plates and same gear box just biger in size so became 100cc...
but suzuki and yamaha engines are totally different from cd70 engines (technology wise :)), i have a great research on bike engines i will tell details if it would be useful for anyone.