ninjette.org - View Single Post - Octane, Money and You??? What do you run in your 250 and why?

Purspeed · May 23rd, 2009, 11:12 PM

87 octane is better than 91 in almost every way other than preventing "pre-ignition" or "engine knocking." This is when the cumbustion chamber ignites before the piston reaches near Top Dead Center (depending on degrees of timing). So, the higher octane is less explosive so prevent "pre-ignition."

~End of Purspeed's Lesson of the Day.

May 23rd, 2009, 11:12 PM	#91
Purspeed ninjette.org guru Name: Purspeed Location: Los Angeles, CA Join Date: Nov 2008 Motorcycle(s): 2007 Ninja 250 Posts: 469	87 octane is better than 91 in almost every way other than preventing "pre-ignition" or "engine knocking." This is when the cumbustion chamber ignites before the piston reaches near Top Dead Center (depending on degrees of timing). So, the higher octane is less explosive so prevent "pre-ignition." ~End of Purspeed's Lesson of the Day. __________________________________________________ "This is my Ninja. There are many like it, but this one is mine..." ~ Purspeed (ca. Nov, 2008)