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Buell Motorcycle Forum » XBoard » Buell XBoard Archives » Archive through May 31, 2005 » Low Lead Fuel? « Previous Next »

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Buellboy05
Posted on Thursday, May 26, 2005 - 09:34 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

anyone know what running low lead fuels in a motor does? is it good or bad?
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Davefl
Posted on Thursday, May 26, 2005 - 10:44 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

In a XB low lead fuel will render you oxygen sensor inoperable.
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Cataract2
Posted on Thursday, May 26, 2005 - 10:44 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Thought they didn't sell lead fuel anymore.
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Davefl
Posted on Thursday, May 26, 2005 - 11:05 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

101LL available at your local airport.
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Fullpower
Posted on Thursday, May 26, 2005 - 02:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

DO NOT RUN 100LL or any other leaded fuel in your fuel injected Buell. 100LL actually has a very large amount of tetra-ethyl lead in it, and will instantly render your O2 sensor useless.
your bike is designed and will run just fine on automotive unleaded pump gasoline. like they sell down at the gas station.
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Tomzweifel
Posted on Thursday, May 26, 2005 - 09:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I used to run a VW Rabbit Diesel on waste JP-8 with some light oil mixed in for the pump. Ran like a champ. Well, as champ like as a Rabbit Diesel gets, anyway.
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Buellboy05
Posted on Thursday, May 26, 2005 - 11:45 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I know that it will kill the o2 sensor. I guess my real question was what will it do to the motor. say you run it in an old motor. someone told me that the lead helps to lube the motor. makes no sense to me. anyone know the specifics.
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Fullpower
Posted on Friday, May 27, 2005 - 12:53 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

i know for a fact that it will darken your oil fast, like in 100 miles or so. it will also leave deposits on the spark plugs after a couple hours. 100LL is useful in high compression engines. it doesnt take a whole lot to bring octane levels up. i blend it with unleaded pump gas for thrashing in a sportster with 205 PSI cranking pressure. takes most of the edge off the detonation at low rpms. also use 10 percent methanol in the blend when i want to go fast.
for a low compression street motor it is completely unnecessary.
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Izzinya
Posted on Friday, May 27, 2005 - 03:07 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

im with fullpower on this

on my bigtwin w 12-1 comp

i mix 4-1 110 oct.

only at the track

the buell injection wont handle that kind of fuell well

works great on 92 at the pump

Izzinya
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Davefl
Posted on Friday, May 27, 2005 - 07:41 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

My father uses 101LL all the time in his RV6A while cruising at 180MPH.
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Metalstorm
Posted on Saturday, May 28, 2005 - 12:48 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

If it's a real old engine (like say a 67' Chevy Impala) I've heard the lead lubed the valves & valve stems but I'm not sure how true this is.. Modern engines have steel valves stems now & do not need lead. My Dad used to buy "lead substitute" for his Impala when leaded gas disappeared but I think he stopped buying it a few years ago and the engine's still running strong. Stock 283, 290K miles and still purrs like a kitten.
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Krassh
Posted on Saturday, May 28, 2005 - 03:44 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

http://yosemite.epa.gov/r10/AIRPAGE.NSF/0/adebd4b8879d36bc88256c0800760bf5?OpenD ocument

"Pre-1971 engines were equipped with "soft" valve seats and leaded gasoline acted as a lubricant to prevent excessive wear
of the valve seats. Using these engines with unleaded fuel in high-speed/high-load situations could result in some valve seat
wear. (Boats, some farm equipment, and tow vehicles may be included in this category.) Substitute lubricant additives are
available at auto supply stores to help this situation. In addition, valve seats are usually replaced with at the time an older
engine is rebuilt."
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