Which gas do you use?
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Novice
Joined: Mar 2010
Posts: 23
Likes: 0
Which gas do you use?
I got a used RK 04 custom,and don't have an owner's manuel?What octane gas should I be using?
Mikuni carb,bassini true duals, K&N air filter,otherwise stock.
I have put 300 miles on using hightest.
Jim
Mikuni carb,bassini true duals, K&N air filter,otherwise stock.
I have put 300 miles on using hightest.
Jim
Tourer
Joined: May 2007
Posts: 286
Likes: 0
From: North Carolina
If your engine is not built and tuned for high octane fuels, running higher octane fuels will result in lower power and increased emissions. The post that said use as low an octane as you can without engine pinging is right. I mostly run 89 octane with no problems. On hot days when I am moving slow, like at rallies, I will up the octane to 92 or so.
Ultimate HDF Member
Joined: Jun 2009
Posts: 6,932
Likes: 4
From: 46th State, USA
I use Shamrock 93 octane fuel locally. My '07 RKC and '09 Ultra Classic owners manuals recommend 91 or higher octane. I read a post a few days ago where some was using 87 octane and said it ran fine. I don't believe that. He may just think it's running ok.
Last edited by shortride; May 25, 2010 at 08:49 AM.
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Road Master
Joined: Nov 2009
Posts: 997
Likes: 3
From: Charlotte, N.C.
I like the shell 93 octane and I use a fuel additive in case the fuel is a bit lower than rated. The manual says 91 at a min tho.
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Club Member
Joined: Aug 2009
Posts: 760
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From: South Carolina
I use "premium" exclusively in my '09 FLTR (and my wife's '09 FLHX) and have never had ANY issues under any riding conditions. What's "premium" can vary from station-to-station - typically either 91 or 93 octane.