Fuel Mixture Octane??

[Question about octane.]

Does it really matter what kind of gas you mix for your bike? What are the differences between the regular 87 octane and the premium gases out there?

 

[Frankenstein]

I wouldn't say it matters unless you're really going all out on mods to make it better. I will say that the difference between 87 at the gas station in town that undercuts everyone by 20 cents and the aviation fuel station which also supplies 87 for cars is that the dirt cheap gas comes with water, rust bits, and little white floaty things. All depends on what you want in your engine really.

92-93 Oct has been reported by some users to run badly, but the requirements to burn such fuels nicely are higher when the engine heats up and runs faster, if the timing is off just a bit then you're looking at detonation city.

 

[Peejus]

I ran some high octane gas and the engine was not happy. But.. The engine wasn't fully broken in and I'm sure I screwed up the oil mixture, so I'm quite willing to call user error on my part.

 

[butre]

high octane gas often contains more ethanol, closer to the 15% maximum. plus it has a natural energy content lower than lower octane fuel. if you don't have the compression to need it, then you don't want it.

 

[Frankenstein]

high octane gas often contains more ethanol, closer to the 15% maximum. plus it has a natural energy content lower than lower octane fuel. if you don't have the compression to need it, then you don't want it.

I actually mentioned that aviation fuel port, they supply ethanol free gasoline. If you do some searching you can find a website that lists places that sell ethanol free gas. I thought the fuel port was significant enough to mention because the high octane fuels don't contain that irritating ethanol that seems to eff up using certain engines on 97 or even 102 octane fuels. It actually seems to do rather nicely when I spin by for a tank, also helps keep that castor from separating in the morning.

 

[Steve Best]

Octane is a component of gasoline that burns slowly, reducing the possibility of detonations and preignition.
Pure octane has a burn speed value assigned as "100" and is used as a comparison for fuel that is a mixture of compounds.
Slow burning fuel is great for a 3500rpm aircraft engine, but kills power on a 6000 to 10,000 engine unless you can speed up the burn by some other means such as compression, heat, confined space or combustion turbulence.

An the engine will make the most power on the lowest octane fuel that it will run on.
If it will run on 83 octane, it will make less power with 97 in it.

Steve

 

[Frankfort MB's]

Octane is a component of gasoline that burns slowly, reducing the possibility of detonations and preignition.
Pure octane has a burn speed value assigned as "100" and is used as a comparison for fuel that is a mixture of compounds.
Slow burning fuel is great for a 3500rpm aircraft engine, but kills power on a 6000 to 10,000 engine unless you can speed up the burn by some other means such as compression, heat, confined space or combustion turbulence.

An the engine will make the most power on the lowest octane fuel that it will run on.
If it will run on 83 octane, it will make less power with 97 in it.

Steve

How cool would it be to say that you have a MOTORIZED BICYCLE that runs on 116 octane racing fuel!!!
Awesome!
There's just some times that I want the wow factor instead the speed factor lol

 

[Frankenstein]

How cool would it be to say that you have a MOTORIZED BICYCLE that runs on 116 octane racing fuel!!!
Awesome!
There's just some times that I want the wow factor instead the speed factor lol

All our bikes run on racing fuel, but sometimes not as well as we would hope...

I upped the compression, better cdi, better plug, this that yadeeyada, so I would appear that my engine could burn better fuel easier, which might explain why it keeps breaking itself at least 3 times a month it seems...

Lesson to all: less power = less stuff breaking, pick your side.

 

[Frankfort MB's]

All our bikes run on racing fuel, but sometimes not as well as we would hope...

I upped the compression, better cdi, better plug, this that yadeeyada, so I would appear that my engine could burn better fuel easier, which might explain why it keeps breaking itself at least 3 times a month it seems...

Lesson to all: less power = less stuff breaking, pick your side.

You've got your bike to last 3 months w/o breaking something?

 

[Frankenstein]

You've got your bike to last 3 months w/o breaking something?

No you'll need to read that again, I ride the bike with it breaking at least 3 times per month, at about 10 days of repairs per break that means that on the months with 31 days I get to ride it one time. Not bad