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Offline big bird

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OCTANE
« on: March 11, 2014, 09:36:28 pm »
Not sure how they rate fuel octane in Europe ,but here in Pa it is 87/89/91/93 octane . I read in one of the posts that someone was running 87 octane in there trophy , I have been running 91 or higher in my bike . What has everyone been running in there bike.
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Offline trophied

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Re: OCTANE
« Reply #1 on: March 11, 2014, 10:26:46 pm »
I'm using 87, regular E10 in mine.  Just got back from 122 mile ride this afternoon in the Hill Country averaging 53.7 mph and got 55.8 mpg. :152:
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Offline Travelling2bob

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Re: OCTANE
« Reply #2 on: March 11, 2014, 10:32:18 pm »
Normally run 95 - 98 RON here in Oz. 91 RON is at least a 10% Ethanol blend here.

Best performance and economy is 95 RON @ 4.3 litres/100km hwy (2 up and loaded) and 4.9 litres/100km Urban (solo).
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Offline Saaz

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Re: OCTANE
« Reply #3 on: March 11, 2014, 10:58:02 pm »
I mostly run 91 RON with no ethanol (equivalent to non-ethanol 87 in the US I think)  I tried E10 (10% ethanol in 91 RON, roughly 94 RON) a few times and seemed to get a little less range, but nothing to worry about most times. 

Offline Briang1234

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Re: OCTANE
« Reply #4 on: March 11, 2014, 11:07:11 pm »
I pump whatever comes out of the lefthand hose (87/89) No complaints from the bike.
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Offline 1150newguy

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Re: OCTANE
« Reply #5 on: March 11, 2014, 11:38:03 pm »
87 octane here in southern Ohio. Bike runs great, averages 53.7 mpg.

Offline Queensland Ken

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Re: OCTANE
« Reply #6 on: March 11, 2014, 11:42:32 pm »
Hi Travelling2bob,

There is plenty of 91 (87 USA) around that isn't ethanol blended, but getting harder to find.
Wouldn't touch Shell 98 or ethanol with a barge pole.
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Offline sungunr

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Re: OCTANE
« Reply #7 on: March 12, 2014, 12:43:49 am »
Manual says to use  Anti Knock Index (AKI) octane rating of 87 (R+M)/2 which is the US standard formula you will see called out on pretty much all US pump stations.  This is simply the (RON+MON)/2 or the average of these two values.  Page 70 of the manual (US) speaks to this.  I am using the suggested value (87) with no problems and good mileage (~52), but like cars folks will use higher octane levels in belief it improves performance or keeps the engine cleaner, etc.  Not saying it does or doesn't, just folks do this.
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