It is currently Fri Jul 21, 2017 9:01 am

All times are UTC





Post new topic Reply to topic  [ 14 posts ] 
Author Message
 Post subject: alternative fuel pump
PostPosted: Mon Jul 14, 2014 4:08 pm 
Offline

Joined: Mon May 24, 2010 9:25 pm
Posts: 35
Location: Lago Maggiore - Italia
model: 906 Paso
year: 1990
I would like to have another fuel pump in my shelf.

do you think is better to buy an original used fuel pump on ebay or a new alternative is available?

grazie

_________________
Ducati Paso 906 grey 1990
Bmw K100rs 4v rot metallic 1992
Aprilia Tuareg Rally 1986


Top
 Profile  
Reply with quote  
 Post subject: Re: alternative fuel pump
PostPosted: Mon Jul 14, 2014 4:15 pm 
Offline
paso grand pooh-bah
User avatar

Joined: Sun Jul 18, 2004 12:00 am
Posts: 5061
Location: southern Germany
model: 750 Paso
year: 1987
you could get a vacuum fuel pump from a Yamaha TDM/TRX or one from a Ducati Monster instead of an electric one. They work fine with the Weber. You only need to connect it to the underpressure connection on the carb manifold.


Top
 Profile  
Reply with quote  
 Post subject: Re: alternative fuel pump
PostPosted: Mon Jul 14, 2014 7:56 pm 
Offline

Joined: Mon May 24, 2010 9:25 pm
Posts: 35
Location: Lago Maggiore - Italia
model: 906 Paso
year: 1990
sounds good....

do you have some codes / articles numbers / or similar ... just to never buy the wrong one... :-P

many thanks paso750, you are always ready to answer at every question posted...

_________________
Ducati Paso 906 grey 1990
Bmw K100rs 4v rot metallic 1992
Aprilia Tuareg Rally 1986


Top
 Profile  
Reply with quote  
 Post subject: Re: alternative fuel pump
PostPosted: Mon Jul 14, 2014 8:46 pm 
Offline
paso grand pooh-bah
User avatar

Joined: Sun Jul 18, 2004 12:00 am
Posts: 5061
Location: southern Germany
model: 750 Paso
year: 1987
this is the Monster fuel pump
Image

a picture from Lanes bike
Image

the Yamaha TDM/TRX fuel pump which I prefer as it`s easier to mount and has all connections on one side
Image

a pic from my bike
Image

Monster pump left, Yamaha pump right. Both are made by Mikuni.
Image

The advantage compared to the original fuel pump is that it doesn`t draw any power and there`s no need of a fuel pressure regulator.

G.


Top
 Profile  
Reply with quote  
 Post subject: Re: alternative fuel pump
PostPosted: Thu Jul 17, 2014 2:03 pm 
Offline

Joined: Mon May 24, 2010 9:25 pm
Posts: 35
Location: Lago Maggiore - Italia
model: 906 Paso
year: 1990
I didn't known this kind of fuel pump...
do you think that buy an used one is a good choice?
g.

_________________
Ducati Paso 906 grey 1990
Bmw K100rs 4v rot metallic 1992
Aprilia Tuareg Rally 1986


Top
 Profile  
Reply with quote  
 Post subject: Re: alternative fuel pump
PostPosted: Fri Jul 18, 2014 5:07 am 
Offline
paso grand pooh-bah
User avatar

Joined: Sat Sep 03, 2005 12:00 am
Posts: 1296
Location: SF Bay Area
model: 750 Sport
year: 1990
Vacuum fuel pumps are common in snowmobiles and jet skis, where the fuel tank is usually lower than the carb.

Edit - Oh, and chainsaws, and lawnmowers too. (though probably not enough volume for your Ducati)

Cheers,
Phil

_________________
Duc in the Bay
1990 750 Sport x2-Rosso Blanko (900ss copy) & Nuovo Nudo (Scrambler project)
1991 907 -mostly stock
2002 ST4s - Lots of mods.


Last edited by ducinthebay on Fri Jul 18, 2014 4:52 pm, edited 1 time in total.

Top
 Profile  
Reply with quote  
 Post subject: Re: alternative fuel pump
PostPosted: Fri Jul 18, 2014 8:11 am 
Offline
paso grand pooh-bah
User avatar

Joined: Sun Jul 18, 2004 12:00 am
Posts: 5061
Location: southern Germany
model: 750 Paso
year: 1987
I`ve bought 5 used fuel pumps in the past. All are still in use and working. (Two in Australia, one in NZ and two in Germany). There`s not much that can break down on a vacuum pump. It´s just the membrane and if the pump is installed properly with a fuel filter before it there`s nothing to worry about.
I personally don`t have any concerns buying a used one.


Attachments:
benzinschmierung_Page_02_jpgKopie.jpg
benzinschmierung_Page_02_jpgKopie.jpg [ 34.21 KiB | Viewed 80 times ]
Benzinpumpe.jpg
Benzinpumpe.jpg [ 65.87 KiB | Viewed 80 times ]
Top
 Profile  
Reply with quote  
 Post subject: Re: alternative fuel pump
PostPosted: Sat Jul 19, 2014 1:53 pm 
Offline

Joined: Mon May 24, 2010 9:25 pm
Posts: 35
Location: Lago Maggiore - Italia
model: 906 Paso
year: 1990
sounds good, but only one more question: which pressure and flow they have or must have to work on a paso?

_________________
Ducati Paso 906 grey 1990
Bmw K100rs 4v rot metallic 1992
Aprilia Tuareg Rally 1986


Top
 Profile  
Reply with quote  
 Post subject: Re: alternative fuel pump
PostPosted: Sun Jul 20, 2014 9:07 am 
Offline
paso grand pooh-bah
User avatar

Joined: Sun Jul 18, 2004 12:00 am
Posts: 5061
Location: southern Germany
model: 750 Paso
year: 1987
I knew that but can`t remember at the moment. If you get the one from the Monster or the Yamaha you won`t have any issues on a Paso. The Yamaha TDM/TRX are 850cc 2 cylinder bikes and the fuel pump of the Monster was used on the 750 and 900CC engine.


Top
 Profile  
Reply with quote  
 Post subject: Re: alternative fuel pump
PostPosted: Sun Jul 27, 2014 6:30 pm 
Offline
paso grand pooh-bah
User avatar

Joined: Sun Aug 01, 2004 12:00 am
Posts: 1091
Location: siena, italy
model: 750 Paso
year: 1988
Very small pressure. 0.3 bar (4 P.S.I.) if I can remember correctly. In example, fuel pumps for elder Mini were ok or any made for carbed engines, 0.2(3 P.S.I.) or 0.5 (7 P.S.I.) can fit with no problem at all.
Anyway there's a big difference with EFI fuel pumps that work @5 bar or more (70 P.S.I.)

_________________
have a nice ride, Nicola

Black "DUKE" 751582
ex...Red "smooth" 753349 :-(


Top
 Profile  
Reply with quote  
 Post subject: Re: alternative fuel pump
PostPosted: Wed Nov 19, 2014 12:34 am 
Offline

Joined: Mon Mar 03, 2014 1:29 am
Posts: 31
Location: Savannah, Georgia, USA
model: 750 Sport
year: 1990
So how do these vacuum pumps work? Where is the negative pressure draw coming from? I might have to try this. Did you just make a bracket and attach the pump to your frame? Ps i have the 750 Sport.


Top
 Profile  
Reply with quote  
 Post subject: Re: alternative fuel pump
PostPosted: Wed Nov 19, 2014 12:42 am 
Offline
paso grand pooh-bah
User avatar

Joined: Sat Sep 03, 2005 12:00 am
Posts: 1296
Location: SF Bay Area
model: 750 Sport
year: 1990
The vacuum line is attached to the intake manifold. There may be a brass nipple threaded in on both of them. They may be tied together with a T, and run back to the Digiplex for vacuum advance. Add another T into the line, and run it to the vacuum pump. The pulses of the negative pressure activates the diaphragm to move back and forth, and there are two one way valves to make it a pump. Mount the vacuum pump where ever you can. Plenty of room on the Sport.

Cheers, Phil

_________________
Duc in the Bay
1990 750 Sport x2-Rosso Blanko (900ss copy) & Nuovo Nudo (Scrambler project)
1991 907 -mostly stock
2002 ST4s - Lots of mods.


Top
 Profile  
Reply with quote  
 Post subject: Re: alternative fuel pump
PostPosted: Wed May 04, 2016 6:50 am 
Offline

Joined: Mon Nov 09, 2015 12:27 pm
Posts: 3
Location: Scotland
model: intending to buy a Paso/Sport
year: 1985
Hi,looking for reassurance :shock: my bike is fitted with a pair of 900 ducati carbs from a monster I think, I presume that I will be able to use the fuel pump as well.

Cheers
Allan


Top
 Profile  
Reply with quote  
 Post subject: Re: alternative fuel pump
PostPosted: Mon Jun 06, 2016 3:50 pm 
Offline
paso grand pooh-bah
User avatar

Joined: Sun Jul 18, 2004 12:00 am
Posts: 5061
Location: southern Germany
model: 750 Paso
year: 1987
Allen, no idea why noone replied. The answer is yes, of course.


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 14 posts ] 

All times are UTC


Who is online

Users browsing this forum: Bing [Bot] and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to: