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Apr 15, 2008 | 08:44 AM

stinkyshoes65

Thread Starter

Stage II

Joined: Apr 2008

Posts: 2

Likes: 0

From:

gasoline

this is my first harley bike ever so if i sound stupid i am, but my question is what kind of gas should i use in my 98rk premium or regular. thanks for any help

Apr 15, 2008 | 08:56 AM

fmbeach

Tourer

Joined: Jun 2006

Posts: 341

Likes: 0

From: Sarasota/Bradenton FL

RE: gasoline

Run the highest octane you can find.

Apr 15, 2008 | 10:57 AM

Stellar HDF Member

Joined: May 2005

Posts: 2,137

Likes: 17

From:

RE: gasoline

Stock evo is 8.5 to 1 compression. 87 octane will work fine. Higher octane fuel only works for higher compression engines.

Apr 15, 2008 | 06:44 PM

mn.roadking

Intermediate

Joined: Nov 2007

Posts: 31

Likes: 1

From: Glyndon, MN

RE: gasoline

It will run fine on either. If you are driving hard in real hot weather, hight octane fuel will help.

Apr 16, 2008 | 12:49 AM

Kruzur

Stage III

Joined: Nov 2006

Posts: 3

Likes: 0

From:

RE: gasoline

Dude...........Bust out the extra .15 - .20 cents a gallon and run the good stuff in your harley.As you trusty friend, it deserves it.

Ride Fast....Ride Safe

Apr 18, 2008 | 03:25 PM

IA DPE

Advanced

Joined: Oct 2007

Posts: 66

Likes: 2

From: Sigourney, Iowa

RE: gasoline

My 86 runs fine on either, but gets better mileage on the good stuff. I use it just to extend my range.

Apr 19, 2008 | 11:37 PM

flstf93

Advanced

Joined: Mar 2008

Posts: 62

Likes: 1

From:

RE: gasoline

even with gas prices soaring every day. just spend the extra dollar at each fill up and run the good stuff. it cost me 16 bucks to fill my bike on high test. that extra dollar ain't gonna kill ya.

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Apr 20, 2008 | 07:01 AM

EVOrider

Stellar HDF Member

Joined: Feb 2007

Posts: 2,558

Likes: 280

From: Russellville, Arkansas

RE: gasoline

Run 87 octane....the EVO was designed to run on this stuff. The exception was the 1995-1998 EFI EVO though as these were designed to run on 91+ octane.

If the modifications were made to the engine like raising compression....then one probably should run higher grade of gasoline. A little pinging from taking off from a stop isn't going to hurt anything either.

If the bike does not ping under normal conditions and the bike is properly tuned...just run 87.

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Apr 20, 2008 | 12:09 PM

dog155

Extreme HDF Member

Joined: Nov 2006

Posts: 13,389

Likes: 26

From: Windham,Maine

RE: gasoline

Suggestion! run a tank of 87 Octane if it does not ping your Golden,if it does step it up a notch.No need to run anything higher than the motor needs.Good Luck.