Fuel type?
#11
Yes, 93 is harder to compress, I stand corrected.
I got my bike with 21,000 miles on the dash and don't know what the previous owner done. I know when I put 87 in my bike, I average 125 mile a tank, 93 I get about 140 out of a tank. Maybe I hate to say, I might have a lot of carbon in my engine, which is why MY bike run better on 93 than 87. My wife feels her bike run better with 91, then that is what she use.
Point is, these bike were built to run on 87 octane NEW!
Since these bike are second, some time third or fourth handers, you never know what has or has not been done to it, which make it runs better on different grade of octane than what is stated in the manual.
It all depends on the condition of the engine for the rider to choose what grade to use.
I got my bike with 21,000 miles on the dash and don't know what the previous owner done. I know when I put 87 in my bike, I average 125 mile a tank, 93 I get about 140 out of a tank. Maybe I hate to say, I might have a lot of carbon in my engine, which is why MY bike run better on 93 than 87. My wife feels her bike run better with 91, then that is what she use.
Point is, these bike were built to run on 87 octane NEW!
Since these bike are second, some time third or fourth handers, you never know what has or has not been done to it, which make it runs better on different grade of octane than what is stated in the manual.
It all depends on the condition of the engine for the rider to choose what grade to use.
#12
Nope I agree, I use use 93 in my bike and when I put in 87 it ran ****ty. Burn that out and run 93 always. High the octane the easier it is to ignite in the combusion chamber when give a greater push on the piston, which = to greater VOOM VOOM. Plus it also do burn cleaner, less carbon build up on the valve and piston head.
#14
#15
#19
I think the smell you smell is unburnt gas, because the premium does not fully burn before it leaves, and honestly to everyone that thinks they need 91, try 89 for a while, if that works try 87, if that does not work go back to 89, I really can not see there being that much build up that it would require 91 or 93 since that is a huge change in compression ratio.
#20
Wrong these bike's were not made to run on 87. On all the manual's it says 91 or higher. They run bad based on 87 is to fast of a burn and needs to be more controlled hence high compression (11:5:1) I think it is. Here it is off from the manual. Also it doesn't have to always be high compression for octang either since advance timing from the factory will cause this too. Most bike manufacturers rather have you be safe with a higher grade fuel if it gets cold out since the air is more dense and cause effects.
Last edited by Krux; 02-20-2010 at 07:53 PM.