fuel question?

2 replies to this topic
  • coorslight1

Posted September 28, 2009 - 05:46 PM


i was looking through my owners manual and i saw under fuel in the spec. section that says "premium unleaded gasoline only with a research octane number of 95 or higher". wondering what the research octane numbers about? do i need to run higher then 91 octane?

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • KJ790

Posted September 28, 2009 - 06:40 PM


The research octane number (RON) is the method of rating fuel in some other countries such as Japan. In the US we use the (RON+MON)/2 method, which is the average of the research octane number and the motor octane number (MON). The MON is always lower than the RON. 95 RON fuel is about 92-93 octane on our rating system. 91 octane is fine at most elevations.

  • grayracer513

Posted September 28, 2009 - 10:20 PM


Read item one in this document.


Related Content


yz250x vs 450 4t comparisons (preferably desert riding) needed by JakeNorthrupYZ450F

Dirt Bike   Make / Model Specific   Yamaha   Yamaha 2-Stroke
  • 9 replies

YZ450F 03 Sparks driving me crazy by SirAttard

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 5 replies

Need help by Goforaride

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  68 replies

2016 YZ450 by CaptainKnobby

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies

Is the 2016 GYTR Yamaha YZ450F too fast? by Fryboy

Dirt Bike   Special Interest Forums   Pro Racing
  • * - - - -
  • Hot  241 replies

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.