The main objectives in MX Grau involve racing against other players, completing various challenges, and unlocking new vehicles and upgrades. Players must use their skills to navigate tracks and reach the finish line first.

To unlock new vehicles, you need to complete specific races and challenges in the game. As you progress, you'll earn points or currency that can be used to purchase or upgrade vehicles in the garage.

Stunts can be performed using specific combinations of buttons while in the air. Generally, you will use the throttle and steering controls together to execute tricks and flips during jumps.

Upgrading vehicles in MX Grau is essential for enhancing performance. There are several aspects to upgrade: acceleration, speed, handling, and durability. To upgrade your vehicle, follow these steps: 1. Go to the garage. 2. Select the vehicle you want to upgrade. 3. Choose the upgrade type (engine, tires, etc.). 4. Spend your earned points or currency to complete the upgrade.

Improving your racing time requires practice and strategy. Focus on mastering the tracks, utilizing shortcuts, and improving your cornering skills. Additionally, upgrading your vehicle for better performance can significantly enhance your race results.