Intake valve -PIAGGIO- Vespa GT 250 (ZAPM45102), Vespa GT L 125 (ZAPM31100, ZAPM31101), Vespa GT L 200 (ZAPM31200), Vespa GTS 125 (ZAPM31300), Vespa GTS 250 (ZAPM45100, ZAPM45101), Vespa GTS 300 (ZAPM45200, ZAPM45202, ZAPMA3300), Vespa GTS Super 125 (ZAPM

This is identical for all displacement. Piaggio uses a widely spread modular system, the cylinder heads are always identical (except for a few minor details which are adapted to the respective model in the finishing department). That means whether 125cc or 300cc, the head is the same. Therefore the higher displacement versions can hardly generate more power in direct comparison, because the filling is strongly limited by the head.