STAGE 1 - MOUNTAIN MAX 21+ - Precision EFI
STAGE 1 - MOUNTAIN MAX 21+ - Precision EFI



Regular price $447.00 Sale price $402.00 Save $45.00

STAGE 1 - 160 HP

Stage 1 adds 8HP to your 2021 Yamaha Mountain Max.​

With this 8HP gain, you will also get a better throttle response.​

This package has been tested and developed for trail and mountain riders.​

You will have to install some adjustable ramps to lower down the RPM. The ideal engine speed is around 7900RPM.

choose between two options

go to a Dealer

Get your ECU Flash by a simple plug into the diagnostic of your powersport vehicle by one of our certified dealers

See Dealer locator


You can send us your ECU.
You only need to fill out this form.

Fill ecu send-in form

you hesitate ?

Did you know that whenever you want you can improve your stage !
You just have to pay the difference between both stages !
This gives you the flexibility to start with the first stage option and upgrade to a more powerful stage without having to pay the full price again.

Did you know you can also add a warranty to your modified vehicle ? 

click here

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