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Old 12-22-2005, 10:59 PM   #1
Doc_Busa OP
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Location: Tucson, AZ
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LC4 Adv. normal fuel range...?

Hey guys, can you chime in on how far your LC4 Adv. will go on a full tank of fuel? I am trying to figure this out "the easy way".

I seem to be getting around 250 miles on my '03 with the normal mods and pretty high-speed riding (several trips to work on the freeway), around this mileage the fuel warning light kicks on... from two past experiences, it seems like the yellow light comes on pretty close to my need to flip the reserve switch, and then I only get a few miles before she's dry. Now, I have really only done this experiment twice, and only once since the new jetting/exhaust. Tonight the yellow light came on with 255 miles on the ODO.

Thanks!
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Old 12-22-2005, 11:12 PM   #2
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A little tidbit of information for you Doc...

I just happen to have my tank stripped of hardware, including the main fuel valve.

As you can see in the photo, the hard standpipe for the primary valve is 5.0" in length. This gives you a better idea of the amount of fuel you potentially have remaining in the tank. So if anything, your light is coming on a little late.



Oh yeah... I get about what you get for mileage under the same conditions, but I can go about 30 miles after the light comes on.

C
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Old 12-22-2005, 11:51 PM   #3
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Thanks Creeper, somehow I knew you would be the first to answer

Sounds like things are on par. How many gallons does she hold again?
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Old 12-23-2005, 04:12 AM   #4
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27 or 28 litres (its been debated) or roughly just under 7.5US gallons.
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Old 12-23-2005, 07:40 AM   #5
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I'm consistently getting 225 Miles with an FCR 168 main 48 pilot and side airbox intake.
Thats primarily 85+ miles an hour highway commute with 17/42 gearing.
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Old 12-23-2005, 08:09 AM   #6
meat popsicle
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250 miles / 7 gallons ~ 35 mpg... not heinous, but I think it sucks when the F650 gets over 50 mpg, which would translate into another 100 miles on a tank for us! That is why once I get the quiet core in my can, and a bit of dough, I am having Scuderia dyno for efficiency. I am sure the power will still be sufficient. I have no self-esteem issues...

I get about the same range on my 03. Hey creeper, could the high flow head have a significant effect on mpg? And is the power so much lower on the pre-HF that it was a good trade off? Maybe I need to trade someone for a low flow head?

ps - I got 25 miles on reserve; the bike died pulling into my driveway... Then I pushed it almost 10 blocks to the station the next day.
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Old 12-23-2005, 08:28 AM   #7
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OK all of you overjetted underachievers... I get around 300-315 miles before reserve. Stock jetting, racing sidecover, and IDS2 Quiet w/10 discs.... But don't forget, I ride like an old woman
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Old 12-23-2005, 08:32 AM   #8
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I am surpised the mileage is not higher too. Again, I am flying down the highway, then ripping it for a mile on a trail I discovered, each day (two times a day). So, it sounds like it is normal. I actually get better mileage on the BMW GS, but it is fuel injected and more importantly, it has a 6-speed tranny.

I still prefer to commute on the KTM just because of that little trail I found... FUN!
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Old 12-23-2005, 08:39 AM   #9
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I actually get around 43-47 mpg when just cruising down the road at a steady speed... which is a rare thing. It's not like I bought a KTfreakin'M for fuel economy.
If I were to figure a grand average... it'd be somewhere in the neighborhood of 40 mpg.
Workin' the throttle and keepin' it spinin' in the 5K to 7K range really puts a dent in the ol' fuel economy.
I bet if you jacked up the air pressure, ran a 17/40 gear set and didn't go over 60 mph, you'd get way over 50 mpg... but where's the fun in that?

Quote:
Originally Posted by Brother Chris
OK all of you overjetted underachievers... I get around 300-315 miles before reserve. Stock jetting, racing sidecover, and IDS2 Quiet w/10 discs.... But don't forget, I ride like an old woman
The term is "adult ridden" my darling.
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Old 12-23-2005, 09:06 AM   #10
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Quote:
Originally Posted by creeper
I actually get around 43-47 mpg when just cruising down the road at a steady speed... which is a rare thing. It's not like I bought a KTfreakin'M for fuel economy.
If I were to figure a grand average... it'd be somewhere in the neighborhood of 40 mpg.
Workin' the throttle and keepin' it spinin' in the 5K to 7K range really puts a dent in the ol' fuel economy.
I bet if you jacked up the air pressure, ran a 17/40 gear set and didn't go over 60 mph, you'd get way over 50 mpg... but where's the fun in that?
True, and I bet that blitzbike's 168mj don't help none either... But if I switched to the pre-03 Low Flow head, would I see much of a change in range, all other things being equal?

Quote:
Originally Posted by creeper
The term is "adult ridden" my darling.
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Old 12-23-2005, 09:44 AM   #11
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Quote:
Originally Posted by creeper
The term is "adult ridden" my darling.
Quote:
Originally Posted by meatpopsicle
"AARP Certified Rider"

WHOOOOOOOHOOOOO!
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Old 12-23-2005, 09:59 AM   #12
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Quote:
Originally Posted by meat popsicle
But if I switched to the pre-03 Low Flow head, would I see much of a change in range, all other things being equal?
I happen to have a pre high flow on the shelf... wana' find out?
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Old 12-23-2005, 10:24 AM   #13
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Quote:
Originally Posted by creeper
I happen to have a pre high flow on the shelf... wana' find out?
I knew that was coming... swap a very lightly used 03 High Flow for a blueprinted pre-03 Low Flow? Hmmm...


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Old 12-23-2005, 10:45 AM   #14
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It's nice of you to post a photo of my porting crew... they work so hard, and deserve a bit of recognition.
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Old 12-23-2005, 10:53 AM   #15
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