| Author |
Message |
    
Fullpower
| | Posted on Friday, January 27, 2006 - 07:04 pm: | 
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hmmm. same 3 and 1/8ths stroke as XB9 with 4.080" bore, 8000 rpm rev limit. this sounds quite buildable for street use, even with single throttle body, and 10 and a half or 11 to one compression. live long and prosper. |
Fullpower
| | Posted on Friday, January 27, 2006 - 07:07 pm: |
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hmmm. same 3 and 1/8ths stroke as XB9 with 4.080" bore, 8000 rpm rev limit. this sounds quite buildable for street use, even with single throttle body, and 10 and a half or 11 to one compression. live long and prosper. |
Diablobrian
| | Posted on Friday, January 27, 2006 - 07:50 pm: |
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That sounds good Fullpower, just not with the current cases. The cases would have to be bored out too far. |
Bigdaddy
| | Posted on Friday, January 27, 2006 - 09:11 pm: |
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Corporate America wouldn't lay out this kind of cash unless they see some ROI in the future.
I, for one, would surely like to see some of those projections.
G2 |
Crusty
| | Posted on Friday, January 27, 2006 - 09:43 pm: |
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The return is right now. Everybody is talking about the RR. We love it. Ricers hate it. Nobody is neutral. This bike has gotten more attention for Buell than a couple of TV spots in the Superbowl would have. |
No_rice
| | Posted on Friday, January 27, 2006 - 10:08 pm: |
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hmm... i'd have to sell both the bikes and my cars and truck to get just a motor. so then what would i put it in?
suppose i could shoehorn it into one of these
think of the power to weight ratio!!!! lol. |
186bigtwin
| | Posted on Saturday, January 28, 2006 - 11:07 pm: |
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New motor looks to have a deep sump, musta learned a few things from the "old" days of XRTT 750 racing, very good. Otherwise the intake tract looks as good as you can get with a 45 degree engine. Looks like a narrow angle pushrod Britten. Hope it can crush it's competition as well. |
Bigblock
| | Posted on Saturday, January 28, 2006 - 11:46 pm: |
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Individually tuned, computer controlled dual downdraft injectors might look real good to a smog machine. Maybe to the tune of a few more years(atleast) of no cats. Which just might pay for that extra injector. And even better fuel economy than the great numbers already being achieved...
It's possible.
Sounds good to me, anyways! |
186bigtwin
| | Posted on Sunday, January 29, 2006 - 12:27 am: |
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Do ya'll remember the problems the XR-750 road race engines had with wet sumping back in the early 70's? Well it looks like the new XBRR cases might be full wet sump so as to get rid of any excess drag on the flywheels. The raised deck cases are old news in AHDRA circles however they do serve a purpose to get the cylinders away from the crankpin and allow the use of longer rods to reduce piston slapping and to get a little more room for the intake plumbing. It looks like a beautiful job but it raises the question if you're gonna cast a whole new engine why not go with 60 degrees, it's already been proven at the drag strip a 45 cannot make the power of a 60 degree engine. Little 160 cu. inch 60 degree motors are making 325 BHP while the old dinosaur 186 cu. inch 45 's can barely muster 285 BHP. Quite a difference. Do we hold on to tradition too long? Still all in all I'm pulling for you Eric. GO BUELL!!! |
Moxnix
| | Posted on Monday, January 30, 2006 - 06:51 pm: |
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Did they give it a trap door transmission? |
Whodom
| | Posted on Monday, January 30, 2006 - 08:38 pm: |
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Good question.
Since evidently parts will be available through Buell dealers, I wonder if someone can get and post an exploded diagram showing the parts for the new engine? We could learn a LOT from that.
DaveS?
(Message edited by whodom on January 30, 2006) |
Xlcr
| | Posted on Tuesday, January 31, 2006 - 02:11 pm: |
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Yes, the trapdoor has returned. |
Crusty
| | Posted on Tuesday, January 31, 2006 - 05:08 pm: |
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Now, it just needs to find its way onto the street bikes. |
Kenb
| | Posted on Wednesday, February 01, 2006 - 09:49 am: |
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what is the advantage of the "pork chop" crankshaft ? I was under the impression that the round wheels reduced drag. Is it a mass thing they reduce with this crank ? |
Mikej
| | Posted on Wednesday, February 01, 2006 - 10:14 am: |
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weight reduction |
Hogs
| | Posted on Wednesday, February 01, 2006 - 10:44 am: |
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Kenb,
That would be one of the reasons why that sucker can rev so high.... |
Mikej
| | Posted on Wednesday, February 01, 2006 - 11:07 am: |
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and get there so quickly too  |
Lornce
| | Posted on Wednesday, February 15, 2006 - 05:25 pm: |
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The first thing I noticed looking at those pics
(besides the obvious differences in head casting and their apparent similarity to XR750 type heads)
was the cast-in-but-not-finish-machined-boss.... for a starter motor.
This must surely be destined for production bikes. |
M1combat
| | Posted on Wednesday, February 15, 2006 - 06:00 pm: |
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It's bloody obvious...
But keep it on the down-low  . |
Blake
| | Posted on Wednesday, February 15, 2006 - 06:30 pm: |
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I wouldn't jump to that conclusion too quickly. Race bikes have starters too. |
M1combat
| | Posted on Wednesday, February 15, 2006 - 06:55 pm: |
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You have a point... but REALLLY... Why WOULDN'T they do it? It would make their race bikes less expensive to produce AND they could sell EXCELLENT race kits for their street bikes (for those that have been converted to race bikes of course...).
You're right though... They probably won't  . |
Lornce
| | Posted on Thursday, February 16, 2006 - 12:14 am: |
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Some do, some don't. The Buell race bike featured in the pictures didn't appear to have one. The Canadian Thunder Championship winning XB doesn't use one.
Don't know the class specs, minimum weights etc. but Honda's factory CBR600RR's in FX trim are sub 360lbs. That's pretty light compared to the XB platform.
Seems the starter'd be a good place to ermmm, start. |
Blake
| | Posted on Thursday, February 16, 2006 - 01:24 am: |
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Sell them with a starter, and the owners can remove them if they like.
Comparing weights of an FX race trim CBR600RR to a street XB? Dude. |
Lornce
| | Posted on Thursday, February 16, 2006 - 09:59 am: |
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Please produce an image of the XB12RR featuring a starter motor. So far, all the images I've seen do not.
An XB12R street bike weighs over 450lbs. As near as I can tell the only place to remove any significant weight is the battery, charging system and starter motor. Signals and lights don't weigh much - you can check that.
Each of these sources of mass appear to have been addressed with the XB12RR.
Efforts to create a less dynamically obtrusive crank appear to have netted significant weight reduction also. As have the lighter wheels.
A terrific effort on Buell Motor Co's part - imho. Hope they make a real impression on the competition at Daytona. |
Diablobrian
| | Posted on Thursday, February 16, 2006 - 10:34 am: |
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Some ASRA bikes weigh a fair bit less than 400lbs and show less than 100rwhp on the dyno. |
Lornce
| | Posted on Thursday, February 16, 2006 - 11:15 am: |
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Neat.
What's an ASRA?
You've got a cool bike and a great attitude. Good on you! |
Blake
| | Posted on Thursday, February 16, 2006 - 03:28 pm: |
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I'm sorry Lornce; I don't have a photograph, so you'll have to take my word for it. 
Did you forget about the magnesium wheels, primary cover, gearcase cover, rockerboxes?
What about removal of passenger pegs, kickstand assembly, license plate bracketry, and I'm sure I'm missing a lot more.
Race tires are typically much lighter than street tires, no?
Pretty sure the headlights, turn signals, tail light, and speedo/dash assemblies would add up to some significant weight.
How about the seat being replaced by a thin piece of foam rubber and the tail section and front fairing being ultra-lightweight carbon fiber?
Maybe the revised tranny is lighter too?
Titanium and aluminum fasteners, axles?
The XBRR Daytona FX machines may not have starter motors installed, but I'm pretty sure the bikes will ship with them. I could be wrong though. |
Blake
| | Posted on Thursday, February 16, 2006 - 03:32 pm: |
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Forgot about the smaller lighter rear brake too.
But then of course add a heavier front brake caliper, fairing lowers, bigger oil cooler and belly pan.
The intake and airbox is probably a wash or maybe a bit lighter than stock.
The airbox cover is likely CF and so lighter for sure.
All the little stuff really does add up.
Even the fork internals are likely lighter than stock.
Sliders add some weight though. |
Matty
| | Posted on Thursday, February 16, 2006 - 04:24 pm: |
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Re: The starter - Our reps at the dealer show and the article in Roadracing World both state that the bike ships with the starter. You can take it off and even buy the o-fish-ul Buell starter cart that will be available soon. |
Lornce
| | Posted on Thursday, February 16, 2006 - 04:39 pm: |
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Thanks for that piece of info, Matt.
Have you got a weight figure?
(Message edited by lornce on February 16, 2006) |
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