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Old 10-20-2005, 03:33 PM   #21
SpiritofNY
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Just checked the Clymer service manual and they say that "detonation" can occur due to LOW octane fuel being used.
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Old 10-20-2005, 04:49 PM   #22
gat803
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And their 100 % right.

Detonation CAN occur. Key word "CAN" detonate.

"CAN" in a high compression motor. "CAN" in a motor with very advanced timing. "CAN" in an extremely hot motor, or one under a heavy load. And also "CAN" in any one of a dozen other situations.

For the vast majority of the engines in the scoot's we most all ride, use the lowest octane you can find, that doesn't pre-ignite in your motor. Usually, that octane rating will be 87.

There is no extra benefit from premium fuel. It doesn't give more mileage, higher performance, or a cleaner engine.

gat
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Old 02-25-2006, 09:15 AM   #23
Icemann
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Using a higher Octane is not going to help the performance of your bike. In fact it can dmage the bike by cuasing over compression or burn out your rings.
To better understand what octane is and how it works check out this link

http://theserviceadvisor.com/octane.htm
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Old 02-25-2006, 08:54 PM   #24
cryin'wolf
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Menace is right use the lowest octane gasoline you can get away with. On a stock bike, with aftermarket pipes and rejetted carbs, 87 should do it for riders throughout most of the US and Canada. Most rejetted carbs tend to run rich at speed, (for lean out on deceleration see other posts) one benefit of this is the extra fuel acts as a coolant, which cools the combustion chamber as it atomizes. Riders in the southern US with stock jets and pipes may expierence detonation while sitting in traffic where intake temperatures can reach 130+ degrees, if you ride in these conditions, have advanced your ignition timing, or both run 89 or higher. Owners manuals recommendations vary on geographic location, Honda's sold in South Florida recommend 93 octane. As for my bike, I ran it on Chevron 93 Sunoco 97.
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Old 02-25-2006, 09:05 PM   #25
Free Spirit
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I ran 93 in mine for about one tank when I first got it. The previous owner had installed a "performance" cam and said that is what he had been running. It ran like a striped-assed ape on the highway but took forever to warm up and had some hesitation on the low-end. I switched to 87 and have loved it! No noticeable loss of highway performance, quicker to warm up (even in the icy midwest) and lots of stop-light-ass-kickin take off power.

BTW... at the top of this thread... 1.19 / gal..... holy cheap ass gas.....
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Old 02-26-2006, 07:13 AM   #26
barthel
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87 and never added no additives
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Old 02-26-2006, 09:11 AM   #27
BamaKC
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All our thoughts on fuel will be changing when they really start forcing alchol based fuels our way.
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Old 02-26-2006, 09:49 PM   #28
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I like alcohol!
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Old 02-26-2006, 11:09 PM   #29
BamaKC
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So do I... just keep it out of my gas tank!
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Old 02-27-2006, 06:22 PM   #30
cryin'wolf
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Please explain to me the benefit of Ethanol based fuels particularly E85, when it requires 29% more energy to mass produce than its useful coefficient. Take into account that the base energy for the electricity to operate the processing plants, and the raw fuel for the combines that harvest the corn, is fossil fuel. Tell me please, why this is a green alternative?
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