1. Install a larger engine. The Baja Warrior comes with a 98cc engine, but you can upgrade to a 125cc or even a 150cc engine. A larger engine will give you more power and speed.
2. Upgrade the exhaust system. The stock exhaust system on the Baja Warrior is restrictive and can limit the engine's performance. Upgrading to a performance exhaust system will help the engine breathe better and produce more power.
3. Install a high-performance air filter. A high-performance air filter will allow the engine to breathe in more air, which will help it produce more power.
4. Adjust the carburetor. The carburetor on the Baja Warrior is factory-set to run lean, which helps to improve fuel economy. However, you can adjust the carburetor to run richer, which will give you more power.
5. Change the gearing. The Baja Warrior comes with a stock gear ratio that is designed for all-around performance. However, you can change the gearing to make it faster by installing a larger front sprocket or a smaller rear sprocket.
6. Reduce weight. The Baja Warrior weighs about 200 pounds, which is quite heavy for a minibike. You can reduce weight by removing unnecessary parts, such as the fenders, lights, and mirrors. You can also replace the heavy stock wheels with lightweight aftermarket wheels.
7. Add a turbocharger or supercharger. This is a more advanced modification, but it can significantly increase the power of your minibike. A turbocharger or supercharger will force more air into the engine, which will help it produce more power.
Please note that some of these modifications may require special tools and knowledge to perform. If you are not comfortable performing these modifications yourself, you can take your minibike to a qualified mechanic.