As you may already know, Aprilia has finally moved away from its decade-long design using a single catalytic converter inside the tailpipe. For the new 2025 RSV4 and TuonoV4 (Euro 5+ compliant), the OEM exhaust system now features a dual catalytic converter integrated into the header “kat-box”, located right under the engine. This change meansContinue reading “Arrow De-Kat Midpipe for Aprilia RSV4 / TuonoV4 2025–2026 (Euro 5+)”
Author Archives: Gabriele Malara
Tone Wheel Sync Procedure for P1309 Error – “RPM Bomb” (Aprilia/Guzzi Euro 5 and Euro 5+ Models)
Applicable Models Aprilia Tuono V4, RS660, Tuono 660, Tuareg 660 (from MY2021 onwards), and other vehicles equipped with Marelli Euro 5 / Euro 5+ ECUs. Purpose This procedure resolves the activation of the MIL (Malfunction Indicator Light) and clears the P1309 error code, which is related to a flywheel synchronization issue or false misfire detection.Continue reading “Tone Wheel Sync Procedure for P1309 Error – “RPM Bomb” (Aprilia/Guzzi Euro 5 and Euro 5+ Models)”
