Should i tune the ecu after venturi kit installation ?

No, our tests show that there are performance improvements without changing the air-fuel ratio.

It's only  recommended to adjust the ecu because the Venturi kit benefit  is maximum when the AFR is optimal.

As you can see in the graph  the bike with  Venturi kit with no AFR tune  (red line) get benefits over the standard kit (green line), but with an optimized AFR (blue line) we gain a better benefit

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