Fuel Injection System Maintenance

In order to keep your system in top condition, proper maintenance is required. Luckily, maintenance on a fuel injection system is considerably easier than what is required for a carbureted system. Most importantly, don’t change anything. Your fuel map was optimized for your particular combination and changing any part of that could significantly decrease performance. In particular, your system was tuned in accordance with your exhaust, injection setup, airbox, fuel pressure, cam timing, and compression. Any of these, if altered, would likely harm performance. Weekly maintenance is also very important. You should flush your system with straight gasoline (absolutely no 2-stroke oil should be used) directly after each weekend of racing. This entails five simple steps:

• Disconnect the return line and put it in an empty jug.
• Disconnect the feed line from the tank and connect to a gas can
• Run the pump until gas exits the return
• Start/run the engine for about 5 seconds
• Disconnect gas can and cap the lines

Inspecting the system weekly (as well as careful initial installation) is also important for maintaining reliability. Be sure that all electrical components are mounted with the plug facing down to prevent water from gathering in the connector. Inspect all wiring weekly for loose, bad, or corroded connections. Pay special attention to the switches. You will also want to clean and inspect the primary fuel filter weekly.