Fuel injection

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Posted by Vlad on June 21, 2006, 7:58 am
 
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How are people liking the new fuel injected bikes? No carburators to
mess with sounds good. How's the fuel economy on a big 1500 or 1800?
For that matter, how's the economy compare on a smaller engine carb to
injected?

--
Two ways to improve your life.
1. Turn off the TV.
2. Throw it out the window.

Vlad the Impaler

Posted by Bryan on June 22, 2006, 11:40 pm
 i've gone from a virago xv700 --- 1 up/min load at 55mph got close to
75mpg on highway.

now, 1500 kaw nomad fi cut mileage in half..... but double the cc/ 500#
vs 800# curb weight.

mine wouldn't be good case to compare.

Posted by 'Vejita' S. Cousin on June 24, 2006, 1:53 pm
 
   I have Suzuki DL650 (Vstrom) which is a 650cc fuel injected bike.  I
have had zero problems with it.  My bike gets ~50mpg.  I like that the
bike is quiet :)

Posted by EffJay R. Yamaha on June 30, 2006, 6:16 pm
 Vlad wrote:

My biggest bike is a 1300 - a four-cylinder 145 hp touring bike.  I suspect
that you have V-twin cruisers in mind when you ask about 1500 or 1800 cc, so
it's not exactly a fair comparison.

I just returned from a 3,500-mile ride through 7 of the western states, and
typically got 48-50 mpg.  Almost none of it was on freeways - well over
3,000 miles of it was on twisty 2-lane roads.  My lightweight commuter bike
is also fuel-injected (it's a 123 hp 600).  It gets slightly less mpg,
usually around 42-44, depending on how it's ridden.  It being a sportbike,
it usually gets ridden pretty hard.

Fuel injection is much more efficient than carburetion.  The correct
air/fuel ratio is provided at all times (assuming a good map), even when
you've changed exhausts or intakes, or drive at sea level or 10,000 feet.
No "jetting" required.  In fact, I added a supercharger to my Miata (which
are all fuel-injected), and didn't have to change a thing.  The computer
automatically matches the fuel flow to the amount of air being pumped in,
even when it's greater than normal.

FI engines burn cleaner, produce more power, and use less fuel than
carburetted engines.  That's why it's virtually impossible to buy a new car
these days without FI.  (Do they still make Yugos?)  Motorcycles are behind
the curve, but catching up quick.  Carburetors won't be with us for much
longer.  It's better to go with the advantages of FI now, instead of holding
out to be one of the last people stuck with carburetors.



Posted by Willy on July 5, 2006, 6:15 pm
 

My 1800cc Gold Wing typically gets 50MPG, 45 with 2 up.

Willy




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