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Is it just me or does 91 seem to let the bike smooth out a little better compared to 87. Filled up at a random station today and thought if save a few bucks by going 87 for the first time this year. Seems temperamental with it.
 

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I've always felt my bikes run better with 91 than 87. So thats what i use...
 

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Imagination is a powerful thing. I can't tell any difference. I did break down and run mid-grade when regular was 85 - 86. I do run mid-grade in the KLR where I can tell a small difference mostly in extreme heat and 93 in the ZX-10 which is stickered for premium.
 

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Imagination is a powerful thing. I can't tell any difference. I did break down and run mid-grade when regular was 85 - 86. I do run mid-grade in the KLR where I can tell a small difference mostly in extreme heat and 93 in the ZX-10 which is stickered for premium.

Well the gas out here in Cali is pure crap. If i don't use Lucas injector cleaner or another product the bike runs crappy..Can't find any non-ethanol gas around here...
 

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I have ran one and only one full tank of 87 octane. My bike ran like poo(comparatively speaking). Nothing but 93 for me from here on out. I have no numbers to back up my claim, but I was on a road trip and had run two full tanks of 93 before switching to 87 and getting right back on the road. I felt like it took slightly more rpms to hold the same cruising speed that I had been going for the rest of the trip, and the throttle seemed less responsive. But, since I have no numbers I can't prove anything. To me though, it is worth the extra $3-$5 to get the premium.
 

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Higher octane always yeilds better mpg and power in my bike or car. Always try for ethonal free if possible. :thumb:

CCW
 

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I have a car, Ford Focus ST, turbo/intercooler, that will make about 10 more hp on premium because it has closed loop fuel injection. On the Versys with open loop you are likely to get no more hp and less miles per gallon because premium is slower burning.
 

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The dealership where i purchased my V sells a ethonal free hi octane gas i am not shure of the price, i think it comes in 5 gal cans. and my V likes 93 much better than 87 , less poping and it will not lag going up a hill
 

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Discussion Starter #11
I'll be going back to 91 after I finish this tank out. At highway speeds I don't seem to notice too much of a difference, but when I took back roads home ( 2 hour commute ) in all the stop and go yesterday it really didn't seem happy with the gas.

Insult to injury- I believe there was a skimmer at the gas pump I filled the V up at and found fraudulent charges this morning.

91-93 Octane may also prevent fraud while riding the Versys.

I think that makes sense.
 

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Is it just me or does 91 seem to let the bike smooth out a little better compared to 87. Filled up at a random station today and thought if save a few bucks by going 87 for the first time this year. Seems temperamental with it.
Lack of (or LESS...) alcohol could be the reason.

Premium 91 pump octane (95 RON) here is available ethanol-free, which yields even more improvement in efficiency and tractability... Octane requirement is reduced at higher altitudes.

http://pure-gas.org/
Thanks for that link invader - I'll give Chevron 94 a try here.
 

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Pffffft.

We've been running ethanol-laced fuel in this area for 25 or more years.

87 octane in everything.

Well, mostly. I do have one bike with cams and higher compression. It pings on anything under 91.

We have a 13hp OHV genuine "Honda" riding lawnmower that is finishing it's 20th cutting season - on the same crap gas that many of you speak about.

They get Seafoam in the fuel in the winter. A couple tanks laced with Techron in the spring. Scientifically, I cannot prove that this does anything. However, it doesn't appear to be a detriment, either.

Sometimes, it's WHERE you get the fuel. We've all got crappy fuel at one time or another. I like the newer gas stations. The ones with the new tanks and no crap in them yet.
 

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I felt like it took slightly more rpms to hold the same cruising speed that I had been going for the rest of the trip, and the throttle seemed less responsive. But, since I have no numbers I can't prove anything.
Not possible. If you are in the same gear, the bike will always turn the exact same rpm to turn the rear wheel at a certain speed no matter what fuel you are burning. Pure mental thinking.

Yep, 87 will make your clutch slip.
:confused: The gas has nothing to do with your clutch. Certain oils could since the clutch is bathed in oil, but not gas octane...

I would love to take you guys and your bikes that can notice these huge differences for a blind test. Have you fill up several times with various gas, but not have it marked what you actually put in. My money is on not feeling any difference. If Kawi says the bike only needs regular, than thats all it needs!


The dealership where i purchased my V sells a ethonal free hi octane gas i am not shure of the price, i think it comes in 5 gal cans. and my V likes 93 much better than 87 , less poping and it will not lag going up a hill
The dealer sells racing fuel. High octane 100+. Brands such as VP. Used for highly modified engines, and people who think that since it costs more it will make them faster....
 

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10.6:1 compression ratio, nothing high-compression, turbo-, super-charged, or exotic about this engine.. Kawasaki says regular will do. So regular should do...

Ethanol increases Octane number, and is an excellent fuel, and in most markets, it's 10% at most, so should not be a problem in this modern engine that is designed to use it.

And as I've stated before, there's so little difference in the additive packages between grades or brands, as to be laughably negligible...

Performance problems related to fuel should be investigated further. It is certainly possible to buy stale or contaminated fuel. Hardly the bike's problem, though.

I try to buy fuel from a busy station, so I know the gas hasn't been sitting around. You know what gas sits around longest, even at the busiest station? Premium.
 

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Not possible. If you are in the same gear, the bike will always turn the exact same rpm to turn the rear wheel at a certain speed no matter what fuel you are burning. Pure mental thinking.



:confused: The gas has nothing to do with your clutch. Certain oils could since the clutch is bathed in oil, but not gas octane...
The point I was tryin' to make. If you are turning a different rpm at a certain speed, your clutch is slippin'.
 

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The most common contaminant in fuel is water. Water in a storage tank can cause the additive package in gasoline to fail. High-humidity can cause storage problems, as the tank breathes, and condensation drops out in the tank - this can happen in your gas tank, too.
It can be especially problematic in ethanol-containing fuels, as the ethanol in the fuel is hygroscopic, and can become 'wet", and cause performance problems. This is the main contributor to the "my car/bike/lawnmower/2-stroke blender/etc. runs like crap on ethanol gas" phenomenon.

I would *guess* this is your issue, and would *hope* it's nothing more serious.
 
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