volume of compression make a big difference on what fuel is required. if there's one thing about fuel hat i've learned is that when they say use a specific octane fuel, they mean it. understand however that there are three different standards worldwide:

RON (Reserch Octane numer)
MON (Motor Octane Number)
PON (Pump octane number, aka r+m/2 method)

here in the US, we use the PON most frequently. RON is usually used every where else, MON is used in the southern hemi.

 

it's not just all about high compression requiring higher octane, that's just one part of it, there's also timing and a/f, etc.

so you can't say a motor needs high octane just based on compression ratio.

i think a search is in order here...USE THE SEARCH FUNCTION...unless it's broken.

 

On my 1996 CBR600 F3 I felt a HUGE difference between 87 and 93. The 87 was much much much better. It was a major improvement in power and response.

My bike is set up with a stock air filter, new Factory needles shimmed for a Vance&Hines full exhaust(Which I don't have yet) and a stock exhaust.

It might change with a full exhaust and become better to run 93. Which I'm going to have it dynotuned later on so I guess I can try both and see it on the charts.

 

Alot higher will result in incomplete combustion, not pre-detonation. Octane is a scale of how a fuel RESISTS detonation.

 

93 or 91 is great for your bike.. just burns cooler.. thats all..

 

i believe that most premium fuels have additives as well..

also i know is that DO NOT BUY FROM HOLIDAY!

Blue planit fuel SUCKS!

i am saying that from much experiance with my own vehiclesand all of my buddys cars, trucks, bikes, quads ext.. cheveron and shell are probably the only ones around where i live that i trust..

 

2004 original printed owner's manual, from dealer, for 04 CBR 600RR says simply to use gas "at least 86 octane".

I always put premium in.

Or if you want to be cheap and **** get the crapiest gas you can find like 86 or 85 octane water fuel ethanol combo juice
from RaceTrac. MMM.....suck it up...and then buy apack of gum with all that money you save.

 

Not "pre-detonation", detonation. At some arbitrary point that is dependent on numerous factors(of which, octane is one), the fuel/air mixture does not burn, it explodes......it detonates. We are saying the same thing in essence. You say incomplete combustion, I say detonate. The racing and engine building world Iwork inuses "detonation" mostly.

The point that was trying to be madeby myself andmany respondantswas that you just can't use any fuel that you can get your hands on and not expect adverse consequences. Some fuelscan be advantageous in their use; the key is learning which ones. That is part of the fun/risk of test and tune. What parts/gadgets/chemicals will give you the edge?

My $.02 again.

Tommy

 

Octane is almost like a RESISTENCE to burning. The higher the number (PON), the more it takes to ignite the fuel and the cooler it burns. The lowest cctane you can use will get you the most power. Use what HONDA says to use.