Katana of the Month - October 2007  SEQX34

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Suzuki GSXF 650 Talk A little corner of katriders for the new GSXF 650s.

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Old 05-12-2009, 11:11 AM   #61
Join Date: Apr 2006
Location: Blaine, WA
Posts: 55


I run 87 in my '08 GSX650F, and have had no pinging, even though it's 12.5:1 compression ratio engine.

Happy riding,
Living truly is truly living
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Old 04-12-2012, 09:55 PM   #62
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few things on ethanol..

hi there ! i'm new (and by the way i'm working in chemistry)

there's a few things a can say about ethanol,

the good:
-ethanol is more environmentally friendly
-ethanol is CH3-CH2-OH, you can see there's oxygen in molecule, it can bring "liquid" oxygen to the combustion chamber and that can "raise" the octane level by few point (or decimal" like a little turbo
-ethanol can merge with water and keep the tank free of water residu

the bad:
-ethanol evaporate really fast, if you leave your bike without running it for 2 or 3 weeks, the water "merged" with ethanol is released in carburetor, and the varnish build-up is faster.
-i'm not sure.. but ethanol can sometimes dry-up more faster rubber and plastic parts that are in contact with the gas
-more power = more heating.. idle speed can run a little faster than supposed
-can dissolve fiberglass tank, i'm thinking more of boating activity, but for the bodyshopper that can read this message..

so good or bad ? dunno.. make your choice. and don't store your bike with a tank full of ethanol !
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Old 04-12-2012, 10:26 PM   #63
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Anything more than 87 on a stock engine is a waste of money.
2014 Ducati Monster 1200

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Old 04-13-2012, 01:32 AM   #64
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Join Date: Dec 2007
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I usually use 91 because :
1) It will be ping when it is over 90 degrees outside and I am running it hard. I blame this on the stock CA spec ignition box and 5 degree ignition advancer.
2) Gas will lose octane as it sits. In the winter time, the bike might get ridden once a week or once every two months, depending on the weather. So, it gets 91 octane along with Startron.

However, I recently started running 87 octane. From what I have read, some of the things that are used to make 91 gas can have less energy than the 87 stuff, which means a little less power and mpg.
I know that racers use the lowest octane required and that is what I try to do.
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Old 04-13-2012, 02:09 AM   #65
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Why was this thread brought back to life.... really....
1992- project katfighter
2005- GSXR750
2001- TL1000R

KATRIDERS RALLY 2014 - cintidude04
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Old 04-17-2012, 08:58 PM   #66
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I have a 1998 GSX600f and put 91 and it runs great. I did put 89 but it seems to run differently in a negative way so I went back to 91.
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Old 04-17-2012, 09:40 PM   #67
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I used to use the $1.00 a gallon a really long time ago, then subsequently moved up to $2, 3$, and now a little over $4.00 a gallon, oh yeah, but the Octane has always been 87...:redte ars
"Life is what happens when you make plans..."

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Old 04-17-2012, 10:04 PM   #68
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I run 89... it is 50ish cents more a fillup than 87 so figured.... what the hell
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Old 04-18-2012, 12:50 AM   #69
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100 octane, because more octane equals more powah.
90% of motorcycle forum members do not have a service manual for their bike.

Originally Posted by Badfaerie View Post
I love how the most ignorant people I have met are the ones that fling the word "ignorant" around like it's an insult, or poo. Maybe they think it means poo
Originally Posted by soulless kaos View Post
but personaly I dont see a point in a 1000 you can get the same power from a properly tuned 600 with less weight and better handeling.
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Old 04-18-2012, 09:18 AM   #70
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If your bike doesn't run the best on 87 octane... you really should fix your bike.

Jus sayn...

93 750 Kat

Modified Swingarm, 5.5 GSXR Rear with 180/55 and 520 Chain, 750 to 600 Tail conversion, more to come. Long Term Project build thread http://katriders.com/vb/showthread.php?t=96736

"I've done this a thousand times before. What could possibly go wron.... Ooops!"
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