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bimota_rider
Joined: 06 Jul 2013
Posts: 213
Location: Utah, USA
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 Posted: Fri Jul 12, 2013 6:49 pm Post subject: Mikuni carb help |
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1998 SB6R w/ 1100W w/ 40mm Mikuni Flat slide carbs.
Can someone tell me what model# goes with these carbs?
Carb#1 bears these numbers on the side, but does me no good trying to find floats, needles and seats.
46EO T741
40D244A
The host engine the GSXR1100W carried the same carbs but in the 36mm model.
Nobody seems to to know what the hell I'm talking about.
AAAAARRRRRRRRGGGGHHHHHHH! 
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'98 Bimota SB6R #000016 "Sweet 16"
Built 5/97
2014 Suzuki Hayabusa
2001 BMW R1100S
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Evilchicken0
Joined: 12 May 2010
Posts: 2996
Location: London
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| Posted: Fri Jul 12, 2013 7:34 pm Post subject: |
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Firstly - standard carbs are 40mm CV carbs not flat slides.
The model bike is a GSXR1100 W ... Watercooled the 36mm was on the original oil/aircooled slabside.
Buy yourself a set off the bay they come up
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bimota_rider
Joined: 06 Jul 2013
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Location: Utah, USA
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oily
Joined: 05 Apr 2008
Posts: 4788
Location: worcestershire
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| Posted: Fri Jul 12, 2013 8:08 pm Post subject: |
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Those are 40mm CV carbs
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bimota_rider
Joined: 06 Jul 2013
Posts: 213
Location: Utah, USA
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| Posted: Fri Jul 12, 2013 8:25 pm Post subject: |
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YES, YES, YES !!!! Thank you guys!!!!
Who would have thought that a carb with a FLAT slider in it wouldn't be called a "flat slide". 
My forte was high-end Euro cars NOT motorcycles. So if anyone needs help fixing their crashed BMW, MBZ, Audi, or Porsche, let me know.
.......anyone want to buy a nice, clean one owner SB........ahhhh Nevermind.
_________________
'98 Bimota SB6R #000016 "Sweet 16"
Built 5/97
2014 Suzuki Hayabusa
2001 BMW R1100S
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Evilchicken0
Joined: 12 May 2010
Posts: 2996
Location: London
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| Posted: Fri Jul 12, 2013 9:16 pm Post subject: |
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See the black bit on the top it has a diaphragm and on the engine side there's a butterfly valve. The throttle cable opens the butterflies and the diaphragm damps the action ... The mixture needle is attached to the diaphragm. It works well on a road bike, you open the throttle wide and the carbs catch up.
Flatslides the throttle cable opens the slide directly, no damping no diaphragm so you just nail the throttle but they're a lot more direct and give better performance.
What's SOL ?
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bimota_rider
Joined: 06 Jul 2013
Posts: 213
Location: Utah, USA
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| Posted: Fri Jul 12, 2013 9:22 pm Post subject: |
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I'm starting to see the picture now.
I do suffer from dumbassitosis....LOL
S.O.L. = Shit out of luck! 
_________________
'98 Bimota SB6R #000016 "Sweet 16"
Built 5/97
2014 Suzuki Hayabusa
2001 BMW R1100S
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bimota_rider
Joined: 06 Jul 2013
Posts: 213
Location: Utah, USA
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| Posted: Fri Jul 12, 2013 9:32 pm Post subject: |
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Thank you for the help guys!
My new floats are on order.
It is easy to see how nobody knew what I was talking about, when I didn't know what I was talking about...... 
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'98 Bimota SB6R #000016 "Sweet 16"
Built 5/97
2014 Suzuki Hayabusa
2001 BMW R1100S
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CBar
Joined: 05 Jan 2010
Posts: 142
Location: Texas
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| Posted: Sat Jul 13, 2013 10:32 pm Post subject: |
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| bimota_rider wrote: |
| I wish I could figure out how to post pictures so they show up on the thread........ |
On your photobucket picture page, there are some links on the right side. Copy and paste the IMG link into your post. |
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bimota_rider
Joined: 06 Jul 2013
Posts: 213
Location: Utah, USA
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| Posted: Sat Jul 13, 2013 11:21 pm Post subject: |
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Thank you Cbar. My photobucket page was set up improperly. I fixed it and because of your help, I can bore the crap out of all of you.
The family vacation slide show starts at 8:30 pm............ popcorn suggested 
_________________
'98 Bimota SB6R #000016 "Sweet 16"
Built 5/97
2014 Suzuki Hayabusa
2001 BMW R1100S
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bimota_rider
Joined: 06 Jul 2013
Posts: 213
Location: Utah, USA
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| Posted: Mon Jul 15, 2013 5:00 pm Post subject: |
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The Bimota dealer in New York City informed me that the OEM application for the carbs found on the SB6R was for the 1997 Suzuki GSXR 750. Those carbs were 38mm and ours are 40mm. But, all parts on those (38mm) carbs interchange with the 40mms, the only difference is the size of the bore/throat.
Any thoughts????
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'98 Bimota SB6R #000016 "Sweet 16"
Built 5/97
2014 Suzuki Hayabusa
2001 BMW R1100S
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Evilchicken0
Joined: 12 May 2010
Posts: 2996
Location: London
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| Posted: Mon Jul 15, 2013 5:39 pm Post subject: |
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I think he's wrong.
Anyway, go to a Suzuki dealer and order for a GSX-R1100W. It's a Suzuki engine you see. The trick with parts for these bikes is to know where to find them and all the engines parts are pretty much Suzuki.
Like I said before these carbs are fairly common, you could go onto the bay and pick up a set and they'll fit. They'd probably fire and run (provided you clean them) then you could have the bike set up and you'd be sweet.
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bimota_rider
Joined: 06 Jul 2013
Posts: 213
Location: Utah, USA
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| Posted: Mon Jul 15, 2013 7:15 pm Post subject: |
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Evil Chicken said:
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I think he's wrong.
Anyway, go to a Suzuki dealer and order for a GSX-R1100W. It's a Suzuki engine you see. The trick with parts for these bikes is to know where to find them and all the engines parts are pretty much Suzuki.
Like I said before these carbs are fairly common, you could go onto the bay and pick up a set and they'll fit. They'd probably fire and run (provided you clean them) then you could have the bike set up and you'd be sweet. |
Actually, I tried to use the GSXR 1100W as my starting point and the parts came in wrong. Mt research showed the US spec GSXR used Mikuni CV 36mm carbs. They were close but NOT the same as the needle and seat had a smaller orifice and I worried about fuel starvation. The floats were also slightly different, as the 36's needle and seat were integrated into the float assembly and on the 40s (My original carbs) the float and the needle and seat are separate units, but the float bowl gaskets were identical.
I am just looking for floats, as my carbs flood, because the floats are NOT closing all the way when the bowls fill with fuel. If I turn the carbs upside-down and allow gravity to close the needle to the seat the fuel shuts off totally. I am hoping that the floats I ordered for the GSXR 750's 38's match my OEMs and float the needles shut, but the carbs I just saw on ebay that were for the '97 suzuki 750 look different, very different.
I also read today that Bimota used the '93 engine in its 97-8 SB6Rs. Can that be true?
Does anyone really know what bike used the Mikuni CV 40mm carbs as OEM equipment???
The national USA rep for Mikuni/Kiehn carbs said without the original OEM bike with these carbs, he can't help me......WTF kind of answer is that?
As far as buying used carbs on ebay goes; I am trying to do this without spending $800.00 on carbs that I will have to re-jet and rebuild for an additional $300.00. My wife is breathing down my neck as it is...... 
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'98 Bimota SB6R #000016 "Sweet 16"
Built 5/97
2014 Suzuki Hayabusa
2001 BMW R1100S
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stockcar
Joined: 07 Apr 2011
Posts: 836
Location: in the shadow of the "angel"
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| Posted: Mon Jul 15, 2013 7:44 pm Post subject: |
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US spec stuff tends to be odd-ball due to the emissions issues..................
basically Euro spec GSR1100W as Evil stated above is what your after |
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bimota_rider
Joined: 06 Jul 2013
Posts: 213
Location: Utah, USA
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| Posted: Mon Jul 15, 2013 11:19 pm Post subject: |
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stock car said:
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US spec stuff tends to be odd-ball due to the emissions issues..................
basically Euro spec GSR1100W as Evil stated above is what your after |
I am afraid you are right. However I thought Europe went to "progressive" emission and horsepower standards before we did. I remember wanting to buy my 98 before we started with the horsepower limits here in the USA. Which we never did.
Regardless, I still need to find out what bike carried the 40mm CV carbs, so I can find parts.
Or find a source in Europe that speaks english and take Major US credit/bank cards and ships to the USA. 
_________________
'98 Bimota SB6R #000016 "Sweet 16"
Built 5/97
2014 Suzuki Hayabusa
2001 BMW R1100S
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