What Octane Gas in the VTX? By Tapper - Page 5 - VTXOA
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post #41 of 104 (permalink) Old 06-21-2011, 06:32 PM
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I started out running Premium in my 1300. It had bunch of decel popping. I then switched to mid grade and the decel popping lessened, Now I run only regular and the bike runs great. Hardly any decel popping.

I'm sold on regular grade. Try it, you'll like it.

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post #42 of 104 (permalink) Old 06-22-2011, 12:59 PM
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87 octane , 87 octane , 87 octane . water cooled = 87 octane ! get it , got it , do it !

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post #43 of 104 (permalink) Old 06-22-2011, 01:11 PM
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87 octane , 87 octane , 87 octane . water cooled = 87 octane ! get it , got it , do it !
Actually water cooled has nothing to do with it. It IS all about compression ratio.

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post #44 of 104 (permalink) Old 06-22-2011, 04:31 PM
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and here i thought i was hurting my baby letting her run on 87 for the past 3 years...
thanks for the confirmation!

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post #45 of 104 (permalink) Old 06-22-2011, 04:53 PM
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there are a few factors that come into play on the grade of gas you use . i just picked the easiest for some to understand .

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post #46 of 104 (permalink) Old 06-22-2011, 07:58 PM
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there are a few factors that come into play on the grade of gas you use . i just picked the easiest for some to understand .
This said with a smile but key factor regarding octane is the compression of the engine. Higher pressure requires higher octane to prevent spark knock aka ping. Old VWs run great on lower octane- mill the heads to make 'em 'race cars' and the ping starts.

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post #47 of 104 (permalink) Old 07-27-2011, 01:00 AM
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Thumbs up Great Info!

Holy Smokes! This is great information all the way around (I have learned more here in a few short days than I have picked up anywhere else in years. A few immediate observations - I was religiously guilty (right up til yesterday) of pumping 91 Octane into both my X and my V Star because it certainly had to be the best....... I was just commenting to myself today on the ride home "damn....sure is a lot of decel popping!" (Stock pipes on the V Star and have never had a pop out of it - I have V&H on the X - pops like a demon while winding down from the sexy rumble of power) I'm going to finish out this tank and start putting 87 in there for all of the reasons discussed throughout this thread. Thanks Spike! Also thanks to the other folks who had experience-based input that augmented the excellent article this thread started with. Great info!

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post #48 of 104 (permalink) Old 09-20-2011, 09:59 PM
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That was what I was told. I've always ran premium in all my bikes. I've had all kinds and been riding 40 years. I've never seen any where where it says to use 87 and I don't know who told you that, use what you want but I'll stay with high grade.
Check your manual for the compression ration. You are pissing money away and not doing your bike any good by using ANY gas above 87 octane,
And Mother Honda is the one telling you that as well as thousands of VTX riders on both 1300 and 1800 models.

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post #49 of 104 (permalink) Old 09-20-2011, 10:54 PM Thread Starter
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Originally Posted by Franksterp69 View Post
That was what I was told. I've always ran premium in all my bikes. I've had all kinds and been riding 40 years. I've never seen any where where it says to use 87 and I don't know who told you that, use what you want but I'll stay with high grade.
It says so right in your owners manual and the Honda factory reps and designers told me at the Honda Homecoming at the Honda plant in Marysville Ohio. "Premium" does NOT mean "Best" in fuel grades. Do some homework and become INFORMED and you can learn a LOT more about engines than your salesman. They know CRAP usually and anyone that told you to run premium in your VTX that was DESIGNED to run on the lowest octane available, is a moron. Your VTX is a low compression engine requiring low octane fuel to run properly. Using high octane will foul your combustion chambers and plugs(just go back and read all about the plug fouling on the 1800 ) and lose you money and power.

But, if you're smarter than the engineers that designed the VTX, then by all means, run racing fuel in it

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post #50 of 104 (permalink) Old 09-20-2011, 11:09 PM
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It says so right in your owners manual and the Honda factory reps and designers told me at the Honda Homecoming at the Honda plant in Marysville Ohio. "Premium" does NOT mean "Best" in fuel grades. Do some homework and become INFORMED and you can learn a LOT more about engines than your salesman. They know CRAP usually and anyone that told you to run premium in your VTX that was DESIGNED to run on the lowest octane available, is a moron. Your VTX is a low compression engine requiring low octane fuel to run properly. Using high octane will foul your combustion chambers and plugs(just go back and read all about the plug fouling on the 1800 ) and lose you money and power.

But, if you're smarter than the engineers that designed the VTX, then by all means, run racing fuel in it

Hey Spike - he might just need hi octane now. All that carbon build up will raise the compression ration and the little bits of glowing carbon WILL cause pre-ignition AKA ping.

Sam/NDAna #15542 IB#38401 '04 1800 C, My LED, Audiovox Cruise, 2xDarkSide & enough other stuff to keep me comfortable. 4400 lumen H4 LED headlights available [email protected] "Can you see me now?" For DarkSide info go here http://mcdarksiders.forumotion.com

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