[Ducati] Carb Setting Info, 95, 900SP

Thu Feb 28 13:27:03 EST 2008

I had the bimota carbon fiber exhaust added,  Maybe that made a difference. 
I lived at a place about 400 feet above sea level and now I am at 800.  When 
I go up into the mountains it is too rich.

Jim

Jim Calandro
il Capo
US DESMO
www.usdesmo.com
704-843-0429
----- Original Message ----- 
From: "cedwards105" <cedwards105 at cfl.rr.com>
To: "Ducati Owners Group" <ducati at ducati.net>
Sent: Thursday, February 28, 2008 12:53 PM
Subject: Re: [Ducati] Carb Setting Info, 95, 900SP

> We did the same thing with the airbox during the dyno testing. The Dynojet 
> kit, available for the Db2 was developed on my bike, all the Dyno testing 
> and tuning was done by Dynojet personnel. The bike ran good after they 
> finished but that still didn't get rid of the lag transitioning from off 
> to on throttle.
>
>
> ----- Original Message ----- 
> From: "Jim Calandro" <capo at carolina.rr.com>
> To: "Ducati Owners Group" <ducati at ducati.net>
> Sent: Thursday, February 28, 2008 11:37 AM
> Subject: Re: [Ducati] Carb Setting Info, 95, 900SP
>
>
>>I had all sorts of problems with my 93 db2.  When I was looking to work on 
>>the carbs I noticed the opening in the air box was about the size of a 
>>quarter.  Either of the two carbs had bigger throats so I just removed 
>>that little nose piece from the air box and all my problems went away. 
>>Not only that but with the bimota full flow exhaust it would pull hard to 
>>the 9K red line  Classic case of too lean do to air flow blockage so I 
>>would say you can safely stay with the stock carbs.  I also had a 95 900 
>>SS/SP and it was a wonderful bike and would pull hard to about 8,500 rpm. 
>>It has a K&N filter, open air box and after market mufflers.  I checked my 
>>maintenance records and unfortunately I did not write down the jetting 
>>changes that were made to it.
>>
>> Jim
>>
>> Jim Calandro
>> il Capo
>> US DESMO
>> www.usdesmo.com
>> 704-843-0429
>> ----- Original Message ----- 
>> From: "cedwards105" <cedwards105 at cfl.rr.com>
>> To: "Ducati Owners Group" <ducati at ducati.net>
>> Sent: Thursday, February 28, 2008 11:32 AM
>> Subject: Re: [Ducati] Carb Setting Info, 95, 900SP
>>
>>
>>> My Bimota Db2 has a '93 900SS engine and stock Mikuni carbs. Even after 
>>> two days of dyno testing and jetting, we could not dial out the stumble 
>>> and lag getting back on the gas.
>>>
>>> Keihins fixed the problem.
>>>
>>> ----- Original Message ----- 
>>> From: <ducati5555 at aol.com>
>>> To: <ducati at ducati.net>
>>> Sent: Thursday, February 28, 2008 11:14 AM
>>> Subject: Re: [Ducati] Carb Setting Info, 95, 900SP
>>>
>>>
>>>>
>>>> thanks Jim
>>>>
>>>> good info, will take a look over the weekend.
>>>>
>>>> Mike
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: Jim Calandro <capo at carolina.rr.com>
>>>> To: Ducati Owners Group <ducati at ducati.net>
>>>> Sent: Thu, 28 Feb 2008 7:51 am
>>>> Subject: Re: [Ducati] Carb Setting Info, 95, 900SP
>>>>
>>>>
>>>>
>>>> Mike?
>>>> ?
>>>> If cutting down on air flow, air filter and air box lid, made the 
>>>> situation worse then I would guess you have a rich condition and 
>>>> depriving it of air made it richer. With that logic I would say 
>>>> lowering the needles might help as they will cut back on fuel flow and 
>>>> make it leaner, the direction I think you might like to head. Look at 
>>>> the jet sizes and compare them to stock to see what has been done. I 
>>>> suspect the owner went up a few jets too many.?
>>>> ?
>>>> I pulled out the Ducati service manual I bought back in early 94 and it 
>>>> says it should have the following?
>>>> ?
>>>> Mikuni?
>>>> Type BDST 38-B67?
>>>> Choke 38?
>>>> Needle Valve jet Y-2?
>>>> Main Jet 140?
>>>> Starting Jet 70?
>>>> Idling Jet 42.5?
>>>> Needle Jet 5C19?
>>>> Pos from top 4th?
>>>> ?
>>>> I do not think they changed much of this over the years but they could 
>>>> have gone leaner for EPA reasons but this would be a good starting 
>>>> point.?
>>>> ?
>>>> Jim?
>>>> ?
>>>> Jim Calandro?
>>>> il Capo?
>>>> US DESMO?
>>>> www.usdesmo.com?
>>>> 704-843-0429?
>>>> ----- Original Message ----- From: <Ducati5555 at aol.com>?
>>>> To: <ducati at ducati.net>?
>>>> Sent: Thursday, February 28, 2008 9:37 AM?
>>>> Subject: [Ducati] Carb Setting Info, 95, 900SP?
>>>> ?
>>>>> The bike ran ok, except it has a stumble when you crack the throttle. 
>>>>>  > Full?
>>>>> throttle it seems to run ok. But just cruising is very annoying. The > 
>>>>> bike?
>>>>> has aftermarket exhaust. When I pulled the tank up I noticed it had no 
>>>>>  > airbox?
>>>>> lid or air filter!. So I bought a K and N and found a lid off of 
>>>>> Ebay.?
>>>>> Installed them and the stumble is now even worse. I have no idea what 
>>>>>  > was done?
>>>>> to the carbs.?
>>>>>?
>>>>> Obviously, the carbs need some work. Is there like a baseline to 
>>>>> start?
>>>>> with, with the mods I have mentioned? Pilot jet, air mixture 
>>>>> adjustment, > etc? I?
>>>>> have adjusted Keihin carbs on my Monster and on all my dirt bikes, but 
>>>>>  > have?
>>>>> no experience with Mikunis.?
>>>>>?
>>>>> Thanks?
>>>>> Mike?
>>>> ?
>>>> *****?
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>>>
>>>
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>
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> 2007
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