Using aviation gasoline (AVgas) in a 2-stroke dirt bike is not recommended. AVgas is designed specifically for use in aviation piston engines and is not formulated for use in motorcycles or other recreational vehicles.
There are a few reasons why AVgas is not suitable for a 2-stroke dirt bike:
Octane Rating: AVgas typically has a higher octane rating compared to automotive gasoline. While high octane fuel is generally desirable for performance engines to prevent knocking or detonation, excessive octane can lead to incomplete combustion in a 2-stroke engine. This can result in fouled spark plugs, increased carbon buildup, and poor engine performance.
Lubrication: 2-stroke engines require oil to be mixed with the fuel for proper lubrication. AVgas does not contain the necessary lubricating additives found in 2-stroke engine oils. Using AVgas alone in a 2-stroke engine can lead to inadequate lubrication, increased wear, and potential engine damage.
Exhaust System: AVgas may have different combustion characteristics compared to regular gasoline. This can affect the performance of the exhaust system, including the expansion chamber and muffler, which are specifically designed for the combustion properties of gasoline.
To ensure the optimal performance and longevity of your 2-stroke dirt bike, it is best to use the fuel recommended by the manufacturer. This is usually a high-quality, unleaded gasoline with the appropriate octane rating, along with the proper oil-to-fuel mixture as specified in the owner's manual.