Weeksy, our mate Alan Shirley did my Old Senna with some vernier cam kit and pulled 6 bhp out of it, albeit with a slightly rough tickover but who rides on tickover ????
Worth it ? Certainly on the track but can be a pain in slow slow traffic.
Techincally speaking from what i can gather, it's about the opening and closing of the valves, and getting them synchronised so they open and close together and at the right times.
Chass,
Already booked in with Louigi after discussions with him and Moto Rapido