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5.1 - Fuel & Gasoline

Fuel Recommendation – Any unleaded gasoline with an octane rating of 90 or higher.

The engine in your motorcycle has been designed to run on any gasoline with a pump octane rating of 86 or higher. Most service stations will display the octane rating above each pump. Although it is not required, AJ1 recommends use of gasoline with a 90 octane, rating or higher to ensure maximum performance and reliability.

Use of a lower octane gasoline can cause pre-detonation in the engine. When this occurs, you will hear a persistent “pinging” or “spark knock” which, if severe, can cause engine damage. It is however no cause for concern if you hear light pinging while the engine is under hard acceleration, such as climbing up a hill. If pinging occurs under normal load and a steady engine speed, switch brands of gasoline and be sure you are using the proper octane rating. Use of unleaded fuel is recommended because it produces fewer engine deposits and extends the life of the engine and exhaust components.


Never use stale or contaminated gasoline. Never use gasoline that has been mixed with oil. Avoid getting dust, dirt and water into the fuel tank.



  1. Before refueling your motorcycle, check the fuel hoses for leaks, damage, cracks, or deterioration.
  2. Replace the fuel hose if you feel it is necessary.
  3. Inspect the fuel filter replace if necessary.
  4. Twist the fuel tank cap counter-clockwise and remove the cap from the tank.
  5. Using a funnel, add fuel to the tank until the level reaches about 2 inches from the top of the tank
  6. Twist the fuel cap clockwise until it is securely tight.
  7. Be sure that you have the breather tube  connected to the gas tank cap.
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