Super Clean 1987 Derbi Variant Sport. 70cc Metrakit, no case matching, hicomp head, 16mm intake n' SHA Dellorto, 4g rollers, tjt clutch springs, MOTOMATIC DESTROYER! Love this bike, super fun and comfy to ride! Progressively improved performance on this bike, carb/intake, unrestricted variator, pipe, rollers, clutch springs and finally cylinder and head. Derbi Derp! Derp! Derp!