HP aluminum thermal group DR 57 mm KT00135 130 cylinder piston head 6 transfers for VESPA 125 PRIMAVERA ET3

Aluminium thermal group DR 130 cc cylinder piston head diameter mm 57 6 transfer ports for VESPA 125 cc PRIMAVERA ET3 In the wake of the great market demand for high-performance kits for Vespa ET3 Classica small frame, DR, a well-known brand in this segment, has recently completed the development of a transformation that will satisfy the tastes of the most demanding owners of these legendary Piaggio scooters. The kit is based on an aluminium cylinder with nickel-silicon galvanic coating, bore 57 mm, displacement 130 cc, characterised by the distribution with 6 transfer ports and elliptical exhaust. The piston is cast in aluminium alloy with a high silicon content with 2 segments to guarantee maximum sealing even in extreme conditions of use. The head, with high turbulence, has a calculated squish band and the spark plug in a conventional position. The strong point of this thermal group is in the balance achieved by the technicians in terms of power output and quality of delivery, which places it halfway between the basic cast iron thermal groups and the extreme ones for competitions: a compromise that will guarantee enormous satisfaction when riding these wonderful classic scooters.