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ducatipaso.org • View topic - ducati tuners, i need your opinion
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 Post subject: ducati tuners, i need your opinion
PostPosted: Sun Aug 09, 2009 5:48 pm 
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Joined: Fri Nov 25, 2005 12:00 am
Posts: 68
Location: the netherlands
model: 750 Paso
year: 1990
:mrgreen: hi there,

because of a lack of euro's i've stopped building my paso for a while, but since a month i picked up my hobby again.

what i wanted to share with you guys is this:

http://www.mijnalbum.nl/Album=74DRR8H4

my new idea :idea: is on the last three pictures of my photoalbum:

48 MM SEMI FLATSLIDES!!! (on a 944 ss engine)

these carbs come from a honda vtr 1000 and the intake manifolds are multistrada 1000.

of course it's only mounted to the cylinder head yet, so i've still got a few problems to tackle but.... i think i can manage it.

question to you is: what do you think about the angle of these carbs?

as you can see on the pics, one carburator is in a more upright position than the other.

of course i will see it works when i'm going to test the engine, but that will still take me a year or so.

please give me your opinion,,

cheers, ab.


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 Post subject: Re: ducati tuners, i need your opinion
PostPosted: Sun Aug 09, 2009 6:59 pm 
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Joined: Mon Jul 26, 2004 12:00 am
Posts: 3081
Location: Finland
I quess, that they are totally too big carburators for U 750 engine....

You have many nice things in fotos, but shall they be ever mounted to Your Paso farme such way, that it really function? If You managed, i will see result so, i wish good luck to You...

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 Post subject: Re: ducati tuners, i need your opinion
PostPosted: Sun Aug 09, 2009 7:28 pm 
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Location: the netherlands
model: 750 Paso
year: 1990
hi antti,

My paso has a 944 supersport engine and i have the st2 cams, so that helps a little to consume the huge amount of petrol.

i've done some reading on the internet and lots of tuners say that most ducati engines, when tuned, need lots more fuel.

the reason why i did not buy keihin fcr 41 flatslides is money.

these carbs costed me 120 euro, and the manifolds 50 euro.

i expect that the totalprice will be no more than 250 euro for this full working kit.

and of course i hope that it is not too much fuel for the engine.

greets, ab.


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 Post subject: Re: ducati tuners, i need your opinion
PostPosted: Sun Aug 09, 2009 8:33 pm 
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paso grand pooh-bah
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Location: Hilltown,Pennsylvania
model: 906 Paso
year: 1990

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Ducati,making mechanics out of riders since 1946
There's no problem so bad that a little fixing can't make it worse! : )
If it ain't broke keep fixin it till it is
88 750
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92 907ie


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 Post subject: 48mm flatslides
PostPosted: Sun Aug 09, 2009 8:35 pm 
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Location: Nottingham, UK
model: 906 Paso
year: 1989
I think that if you did mount them properly in the engine the air velocity through the flatslides would be very slow at low rpm. I don't think it would like to tickover and the throttle response would be poor. A big carb for a 750.

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 Post subject: Re: ducati tuners, i need your opinion
PostPosted: Tue Aug 11, 2009 1:53 pm 
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paso grand pooh-bah
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Joined: Sun Jul 18, 2004 12:00 am
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Location: southern Germany
model: 750 Paso
year: 1987
48mm carbs are too big even for a 944 engine. Intake airflow speed will be low due to the large diameter and you will probably run into problems trying to find a proper setup.
What looks weird to me too are the inlet manifolds that reduce the diameter so much. I guess the cylinderhead ports are original ?! Just combining parts w/o matching them will not work.

G.


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 Post subject: Re: ducati tuners, i need your opinion
PostPosted: Fri Aug 14, 2009 7:48 pm 
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Joined: Sun Jan 16, 2005 12:00 am
Posts: 257
Location: The Netherlands
model: 750 Paso
year: 1989
Ab, why not install an 900 engine with wiring..?

cheers. Léon
brabander

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 Post subject: Re: ducati tuners, i need your opinion
PostPosted: Fri Aug 14, 2009 8:33 pm 
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paso grand pooh-bah
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Joined: Tue Jul 29, 2008 9:50 pm
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Location: Hilltown,Pennsylvania
model: 906 Paso
year: 1990

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There's no problem so bad that a little fixing can't make it worse! : )
If it ain't broke keep fixin it till it is
88 750
90 906
92 907ie


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 Post subject: Re: ducati tuners, i need your opinion
PostPosted: Fri Aug 14, 2009 11:30 pm 
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paso grand pooh-bah
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Joined: Sat Sep 03, 2005 12:00 am
Posts: 1323
Location: SF Bay Area
model: 750 Sport
year: 1990
Since these are CV carbs, they may carburate OK, but they will be a bit sluggish. Should have adequate top end, and decent mileage. it just won't have a lot of snap to it. You get the classic rubber band powerband. Its all there, but it just reacts slowly. If anything else, it will teach you to be smooth with your throttle.

Cheers,

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1990 750 Sport x2-Rosso Blanko (900ss copy) & Nuovo Nudo (Scrambler project)
1991 907 -mostly stock
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 Post subject: Re: ducati tuners, i need your opinion
PostPosted: Sun Aug 16, 2009 8:13 pm 
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Joined: Fri Nov 25, 2005 12:00 am
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Location: the netherlands
model: 750 Paso
year: 1990
hi,

thanks for the replies all of you.

i think the best thing to do is buy a pair of keihin fcr 41 carbs.

maybe some time next year i will mont them, just to see how they run.

by then i'll let you know.

thanks, ab. :mrgreen:


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 Post subject: Re: ducati tuners, i need your opinion
PostPosted: Sun Aug 16, 2009 8:36 pm 
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paso grand pooh-bah
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Joined: Tue Jul 29, 2008 9:50 pm
Posts: 3259
Location: Hilltown,Pennsylvania
model: 906 Paso
year: 1990
If you need first hand info on the 41mm keihin check out this link

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Ducati,making mechanics out of riders since 1946
There's no problem so bad that a little fixing can't make it worse! : )
If it ain't broke keep fixin it till it is
88 750
90 906
92 907ie


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