fuel injection pressure regulator Polini for Yamaha T-MAX 500i 173.0001

Polini injection pressure regulator for the fuel system suitable for Yamaha T-Max 500 maxi scooter with gasoline direct injection. This Polini fuel injection pressure controller raises the pressure in the injection system from original 2.5 to 3.5 bar. When tuning measures have already been taken to increase the intake flow (improved air filter, exhaust system or injection module), the installation of this Polini fuel pressure regulator is strongly recommended. The increase in performance is mainly noticeable at high speeds and full throttle.