ECU Flash Service - Yamaha Grizzly 700 ECU (CDI) 2025-2026 UPOMIAH48408 The 300R in stock form

The 300R in stock form comes out of the gate with a good 3-4 more peak and more down low

or the track

it's time for a repack

we've been able to play around with different fuel controllers and intakes to see if we could further unleash the machine and improve performance

ECU Flash Service - Yamaha Grizzly 700 ECU (CDI) 2025-2026 UPOMIAH48408 The 300R in stock formBarkers Exhaust ECU Flash Service 20252026 Yamaha Grizzly 700 This service re flashes your stock OEM ECU CDI with a custom calibration developed specifically for Barkers Exhaust systems on the 20252026 Yamaha Grizzly 700. From the factory, these newer Grizzly 700 models are extremely sensitive to fuel and airflow changes. When a performance exhaust is installed, the stock ECU often triggers a check engine light. Our ECU flash corrects this behavior