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Depending on your application you may be using a commercial race fuel. This has many benefits including consistencey which is not the case at the local station. Ethenol and other pump additives can cause temperature increases causing all kinds of issues with smaller higher performance engines.

Regardless of the reason you deside to run a race fuel, it is important to take a few steps to protect your engine and fuel system from the negative effects of these products; particularly those which contain oxygenators. Some fuels leave a sand like substance all over valves, seats, combustion cambers etc...

We recommend that you drain your fuel tank after each use and purge the engine for several minutes with pump gas. This will wash the entire system of potential corrosion causing compounds. To take it a step further, you can also spray a quality engine storage spray or mixture of 2-stroke oil and fuel into the intake while it is running. This only needs to be done for a few seconds per cylinder in order to fog the valves and cylinder walls.

So take the time and prolong the life and performance of your investment. 

Rich