We'll upgrade the ECU and send it back the same or next day we receive it!Īs standard, for Yamaha skis we usually recommend a 8650 RPM limit tune! Whether you've just hopped on your Yamaha for the first time or been riding it for years and want to upgrade, a Worx Tune is always a great idea!Īs one of the easiest upgrades to make, the upgrade process is super straightforward! All you have to do is remove your ECU, send/drop it in to us.