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Buell Forum » 1125R Superbike Board » Archives 001 » Archive through November 29, 2007 » Fuel range with new larger tank « Previous Next »

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Mrvvrroomm
Posted on Tuesday, July 10, 2007 - 09:21 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I see there are a lot lauding the increased fuel capacity. Yeah, it's a great idea, but don't for one minute think you're going to be able to extrapolate the current XB's gas mileage over to the new Rotax motor's.

I'm absolutely, positively sure that the new bike is going to get significantly worse gas mileage than the "old" XB's.

I'm seriously diggin' the new bike, but you're still gonna be lookin' for fuel around 150 miles.
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Alchemy
Posted on Tuesday, July 10, 2007 - 02:30 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

With 6 gears and plenty of low end grunt it may run pretty efficiently in 6th at 55 mph for the highway rating.
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Smokescreen
Posted on Tuesday, July 10, 2007 - 02:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

My service manager, who attended the dealer meeting, said the engineer who conducted the Buell seminar said "expected numbers were 30 mpg under heavy load and 40-50 under easy load." Now you'll just have to wait for the final numbers to see for yourself!

Smokescreen
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Barker
Posted on Tuesday, July 10, 2007 - 02:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Its a close ratio 6 speed, not overdrive.

6th is 1 to 1.

I am waiting on MPG.

1098 when driven hard get 75 miles to a tank, no joke.

The 1125R has duell 61mm intakes. with a 10k redline. I dont see this one being "good on gas"
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Jackbequick
Posted on Tuesday, July 10, 2007 - 03:12 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Reading Smokescreen's input, which is admittedly a little third hand, I would think that 200 miles to a tank should be easily attainable in a cruising mode. This is a pretty smart engine, it's not likely to be gulping large amounts of gas at all throttle openings and across the RPM range.

And 200 is about right. I don't know too many people that aren't ready for a stop at that distance. Especially after you do two or three or more back to back.

Jack
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Aeholton
Posted on Tuesday, July 10, 2007 - 03:18 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Its a close ratio 6 speed, not overdrive.

6th is 1 to 1.

There was a correction posted by Anonymous in the this thread (http://www.badweatherbikers.com/buell/messages/290 431/291090.html?1184093613) that 6th gear is actually 0.960 to 1 in 6th gear. Don't know how much difference that makes, but I think it technically makes it an overdrive.
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Chessm
Posted on Tuesday, July 10, 2007 - 03:22 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

also dont forget to factor in the volume of the fuel pump or whatever it is in the XB tank that uses up space.
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Curtyd
Posted on Tuesday, July 10, 2007 - 03:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

"...it may run pretty efficiently in 6th at 55 mph for the highway rating.."

YEAH, for about .5 seconds they'll be running at 55 mph in sixth gear. I CAN'T even run 55 and I am an old,

whoops,

"MIDDLE-ager".
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Ebear
Posted on Tuesday, July 10, 2007 - 03:55 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Don't expect Air-cooled numbers.....My Rotax gets 30- 35mpg around town......Unlikely it will ever get over 40 even with Erik's intense and lengthy work on the Aero's...but sure will be fun finding out!!!!
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Thespive
Posted on Tuesday, July 10, 2007 - 04:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Don't expect Air-cooled numbers.....My Rotax gets 30- 35mpg around town......Unlikely it will ever get over 40 even with Erik's intense and lengthy work on the Aero's...but sure will be fun finding out!!!!

Hmm, thats funny, I thought it would be more fun seeing how little fuel economy you get!

--Sean
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Smitty
Posted on Tuesday, July 10, 2007 - 04:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

My friends Futura was hard on gas even driven easy but that was the old rotax. Maybe with the new motor and new fuel mgt. we might see 35 mpg. High compression = more fuel consumption.
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Firemanjim
Posted on Tuesday, July 10, 2007 - 05:32 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

That is so not true, higher compression does not equate to poorer mileage. Look at the compression ratios modern bikes are running. High compression makes more power and with better spark control, piston and cylinder head designs, and fuel injection it can be done without the detonation that was common before.
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Smitty
Posted on Tuesday, July 10, 2007 - 09:44 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

That is so not true, higher compression does not equate to poorer mileage.

In general I have'nt seen a higher compression bike similar size and weight get the same economy of lower one. I think thats why the fuel tank is larger. So the bike will have a little range . I'm guessing low to mid 30s.
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Josh_
Posted on Tuesday, July 10, 2007 - 11:01 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

hmm 5.6 gal tank and maybe mid-30 MPG, so it will have about the same range as my FJR.
Sweeet.

But if I read this right, the bike will calculate average and instant MPG for you and tell you how many miles of reserve are left, but no actual gas gauge or how many miles you have left not on reserve?

(Message edited by josh_ on July 10, 2007)
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Mrvvrroomm
Posted on Tuesday, July 10, 2007 - 11:11 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Same range as FJR? Huh? I put 25K on an '04 FJR. I regularly got 200+ miles per tank. I didn't ride my FJR easy.

As far as the new Buell, it will start counting UP once the reserve light comes on. This just means you'll know how far you've gone on reserve if you didn't see the light come on.

I'm sticking with my 150ish range on the new 1125r.
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Firemanjim
Posted on Wednesday, July 11, 2007 - 01:05 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Well,my Triumph Sprint is 11-1 and gets in the 50's for MPG.
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Josh_
Posted on Wednesday, July 11, 2007 - 01:57 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

>it will start counting UP once the reserve light comes on

ok, just like the FJR.

But a fuel gauge would be nice.

My FJR gets ~38MPG and I get 9000miles on a rear Z6 (so I don't ride too hard).
I'll put over 200 on a tank but you can bet I've planned my next gas stop before 200.
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