Gents,
Last couple of days I have had a go at the fuel pump. Installed the vacuum pump from a Yamaha and altered the fuel lines. Btw, my Paso is the Cali model with the digiplex. As you will probably know the digiplex is activated by the vacuum from the manifold. Two tubes are connected to the manifold, see number 49 below. These two tubes are joined together with a plastic T and one tube will continue to the digiplex.
In my new setup I only used one connection for the digiplex (mainfold vert cyl) and one connection for the fuel pump (manifold hor cyl). My question is if this will effect the timing advancement from the digiplex. Don’t really know if the vacuum of both sides are needed.. Like to hear your opnion
digiplex in combination with vacuum fuel pump
- Brutus
- Posts: 257
- Joined: Sun Jan 16, 2005 12:00 am
- model: 750 Paso
- year: 1989
- Location: The Netherlands
digiplex in combination with vacuum fuel pump
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- Brutus
- Posts: 257
- Joined: Sun Jan 16, 2005 12:00 am
- model: 750 Paso
- year: 1989
- Location: The Netherlands
Re: digiplex in combination with vacuum fuel pump
Here some pictures of the vacuum pump modification. Return line to the tank is eliminated. Startup is much approved. I'll have to test the setup of mains, idle jets etc. again
- Attachments
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- old pump
- Foto0954.jpg (146.32 KiB) Viewed 6449 times
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- yamaha vacuum pump fitted on homemade alu bracket
- Foto0961.jpg (169.45 KiB) Viewed 6449 times
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- new pump fitted
- Foto0965.jpg (123.25 KiB) Viewed 6449 times
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Better too late than too ugly..
Better too late than too ugly..
- Brutus
- Posts: 257
- Joined: Sun Jan 16, 2005 12:00 am
- model: 750 Paso
- year: 1989
- Location: The Netherlands
Re: digiplex in combination with vacuum fuel pump
Here the new lines installed. The orange line is the vacuum from the right side of the manifold to the pump. The blue lines supposed to be the flow of fuel from tank to pump to weber.
Léon
Léon
- Attachments
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- Foto0962.jpg (224.29 KiB) Viewed 6449 times
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Better too late than too ugly..
Better too late than too ugly..
- paso750
- paso grand pooh-bah
- Posts: 5560
- Joined: Sun Jul 18, 2004 12:00 am
- model: 750 Paso
- year: 1987
- Location: southern Germany
Re: digiplex in combination with vacuum fuel pump
nice job. I don`t think it makes a difference for the Digiplex if it is only connected to one side of the carb manifold.
Afterall there might two connections only because of the necessity to connect a carb balancer.
G.
Afterall there might two connections only because of the necessity to connect a carb balancer.
G.
- Brutus
- Posts: 257
- Joined: Sun Jan 16, 2005 12:00 am
- model: 750 Paso
- year: 1989
- Location: The Netherlands
Re: digiplex in combination with vacuum fuel pump
Tx Gerhard,
I couldn't resist to have another go at the manifold. Below the current setup. Drilled a hole and fitted a third tube for maximum vacuum to the pump. I was considering to drill out the m6 bolt as shown in drawing above, nr 56. As you probably will know the left one goes through the manifold into the channel. I have a lathe, but this small tubing is a b%tch to create myself.
I couldn't resist to have another go at the manifold. Below the current setup. Drilled a hole and fitted a third tube for maximum vacuum to the pump. I was considering to drill out the m6 bolt as shown in drawing above, nr 56. As you probably will know the left one goes through the manifold into the channel. I have a lathe, but this small tubing is a b%tch to create myself.
- Attachments
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- Foto0971.jpg (179.15 KiB) Viewed 6368 times
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- Foto0973.jpg (159.45 KiB) Viewed 6368 times
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- Foto0974.jpg (188.42 KiB) Viewed 6368 times
_________________
Better too late than too ugly..
Better too late than too ugly..
- Brutus
- Posts: 257
- Joined: Sun Jan 16, 2005 12:00 am
- model: 750 Paso
- year: 1989
- Location: The Netherlands
Re: digiplex in combination with vacuum fuel pump
Gents,
This is how she runs right now. Pretty pleased with the result. She starts at the first turnover and she responds better between 0-3500 rpm.
https://youtu.be/1wynNtc5p3g
Ducati 750 paso Cali model
Ignition:
- Stock Digiplex, stock connection vacuum lines to manifold
- Stock flywheel and pickup sensor
- Ducati 996 coils, added superseal connectors to wiring loom
- Red ngk spark plug wires and caps
- iridium spark plugs ngk DCR8EIX, gap at 0,9mm
Fuel supply:
- stock petcock
- universal fuel filter
- vacuum Fuel Pump For Yamaha (XVS125, XVS250,TDM850)
- extra vacuum line between right side manifold and fuel pump
- homemade bracket for vacuum pump
Weber:
- idle jets 60
- main jets 145
- air correctors 175
- idle adjustment screw 4 turns out (4 x 360degr)
- air adjustment screw: left closed, right approx 1 turn out
- float level 43mm (with gasket)
- stock aux 3,5 venturi
- aftermarket K&N airfilter
This is how she runs right now. Pretty pleased with the result. She starts at the first turnover and she responds better between 0-3500 rpm.
https://youtu.be/1wynNtc5p3g
Ducati 750 paso Cali model
Ignition:
- Stock Digiplex, stock connection vacuum lines to manifold
- Stock flywheel and pickup sensor
- Ducati 996 coils, added superseal connectors to wiring loom
- Red ngk spark plug wires and caps
- iridium spark plugs ngk DCR8EIX, gap at 0,9mm
Fuel supply:
- stock petcock
- universal fuel filter
- vacuum Fuel Pump For Yamaha (XVS125, XVS250,TDM850)
- extra vacuum line between right side manifold and fuel pump
- homemade bracket for vacuum pump
Weber:
- idle jets 60
- main jets 145
- air correctors 175
- idle adjustment screw 4 turns out (4 x 360degr)
- air adjustment screw: left closed, right approx 1 turn out
- float level 43mm (with gasket)
- stock aux 3,5 venturi
- aftermarket K&N airfilter
_________________
Better too late than too ugly..
Better too late than too ugly..