what do you mean? if you go to chevron, their 87 isn't any good? i haven't noticed any difference so far, but if i notice anything i'll let you know.

 

I think it is that tecron crap they add in to make it burn clean. I reworked the fuel system on my 76 cj5 and within a month I noticed a large build up of rubber in my filters. All I ran was chevron and it started eating away at my rubber hoses. Switched to shell ran fine. As far as running chevron 87 in my bike it knocks like crazy but if I go to shell I can run 87 just fine.

 

hey i was reading these posts about who's bike runs what octane and I actually looked it up in my owners manual and it says quote,
"Use of lower octane gasoline can cause persistant "pinging" or "spark knock"(a loud rapping noise) which, if severe, can lead to engine damage". Odd how other CBR's can run almost any octane and others have to run say 93. But it doesnt bother me any cause i was planning on putting 93 in mine. Is it just the newer bikes (2000+) that have to run higher octanes or are there earlier CBR that have to run higher octane?

Just curious?

-Tom-

 

The compression ratio of your bike will determine what octane you need. All octane rating means is resistance to detonation (pinging). At high revs and compression detonation will literally tear your engine apart. Rods that look like bananas are common.

Higher compression = more heat (Boyles Law), more heat = gas explodes in cylinder before spark (detonation), higher octane = resistance to heat induced detonation.

So, 11:1 or better in a high revving bike engine I recommend 93 -- if you're running NOS or a turbo then your compression will soar and you may have to run av-gas, water injection or an intercooler to keep things together.

 

R+M/2 . R=research method. M= I dunno.

The actual correlation is R+M/2, R=research octane, M=motor octane /2= add the 2 together and divide by 2 you get the PUMP octane

 

Bought an 02' 954. No owners manual. Can anyone advise what octain fuel is recomended for it?

 

I have a 900rr and run 93 octane with Lucus Octane booster. I always get spark knock when using 91 or less. Ive tried it all.

I guess that's what I get for porting, polishing, and changing out the ehaust can. There was other engine work done as well, but I have to keep all that a secret

 

Chain....Do you have a motorcycle encyclopedia in your head? Some of the technical knowledge that you have given to people is mind blowing. Do you wrench for a living or just read alot of books?

 

When i got my bike it had an idiot sticker on the tank saying not to use anything less than 95 octane. So ?

 

about the gas stations yes... AVOID ARCO... they have clean air fuel additives that are no good for you and your 600 RR. BE WARNED!!!... lol actually that might be a myth but it sounds like it could be true.... anyone?