Ghost 668 Fuel Pump ..

steph

steph

Hero member
Location
Torgny, Belgium
'morning All

I have looked through the various posts about the "Zané" fuel pump but have not found the answer I was looking for.

I am brand new to the Zane universe and have recently become the happy owner of a beautiful Ghost (tubular frame) from late Graham E. Chappell, the former Laverda dealership's owner in North Carolina, USA.
I then imported her to Belgium, Europe, back in 2023.

The engine was running before the winter and started immediately.
I tried to start the engine a few days ago without success.
Stupidly ... I forgot to drain the fuel tank before winter installation :(
When I turned the ignition key the characteristic sound of the fuel pump being activated has disappeared.
All relays and fuses seem okay.
I'm suspecting a gummed pump issue.

Questions
What are the double connections (see picture below) on the upper side of the fuel tank under the seat for ?
How and where can I directly power the fuel pump in order to test it ?

Thank you for your help.
Cheers.
Stéphane

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Last edited:
Come on guys ..

What are the double connections (see picture above) on the upper side of the fuel tank under the seat for ?

How and where can I directly power the fuel pump in order to test it ?

Thanks a lot
 
I checked in my garage. See the picture for the wiring at the gastank.
Purple = + and black = - or massa. Orange and green are for the fuel level.
Mostly when the fuelpump doesn’t work it’s the relais in the seat or the switch at the sitestand.
Or the kilswitch at the throttle.
 

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Thanks a lot
Otto said:
I checked in my garage. See the picture for the wiring at the gastank.
Purple = + and black = - or massa. Orange and green are for the fuel level.
Mostly when the fuelpump doesn’t work it’s the relais in the seat or the switch at the sitestand.
Or the kilswitch at the throttle.
Click to expand...

Thanks a LOT Otto !
Relais is working fine.
And side-stand switch has been bypassed and removed.
Kill switch ON :)

Regards
Stéphane
 
arancia said:
I love my 668 Ghost - congratulations on finding one.
One is fuel level sensor, the other is power to the fuel pump.
The fuel pump power is triggered by the ECU through a relay - get yourself the wiring diagram!
Join the Zane' group at https://groups.io/g/zanelist
Click to expand...

Thanks Orange :)

I wanted to discriminate #27 and #28 on the diagram below.

( .. strange design with live leads bathed in gasoline .. )

Thanks for the Zane Group link (y)

Cheers
Stéphane

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Source https://www.3cmoto.it/public/Cataloghi/LA00900/zooms/LA00900_12.gif
 
As you can see from the above diagram it's a right PITA if the fuel pump has failed. If the pump is goosed it would be as well to replace the fuel lines and filter at the same time. I now fit the fuel filter externally under the air box cover, so at least that part is easier to get to if it gets blocked.
It is possible to get to the pump by removing the rear wheel, which saves taking the tank out.
 
Hello All,

After some investigation it appears that the fuel pump of the Ghost is no longer functional.
The goal now is to empty the tank.
I used a small hand pump to empty 6 liters through the upper hole (tank cap) but there are still 10 liters that are inaccessible with this system.

Quick question
Is there a simple trick to drain the gas tank ?

Thanks a lot

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Hi All,

Thanks to various inputs and the help of our great Laverdisti community I was able to drain the fuel tank (by siphon it out .. as simple as that thanks to Hamish Renfrew on FB) and access the fuel pump by removing the rear wheel (thanks Andy J (y) ).

And now, in order not to do anything stupid, what is the correct procedure to reach the pump connectors ?

By unscrewing the bolt (through which the power cables pass) from the upper part of the tank ??

Your opinion is highly desired :)

Thanks a lot !
Cheers
Stéphane

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You need to unscrew the bolt with your finger on and pull the pump back up to disconnect the connectors from the top of the pump as there is possibly insufficient slack in the cables to do it from the bottom of the tank.
 
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