Favour to ask

Quite simple favour to any owners of Kwak ZXR 400/600 Ninjas etc.
Would any of the above or similar turn on their ignition and listen to the
electric fuel pumps for me please?

All I need to know is if they run constantly without the engine running or
do they run for a few secs and then cut out as pressure/float bowls filled?

Thanks.

 

That is handy to know cheers Champ.

Believe the ZXR 750 is the same model of pump and I`m talking carb models.
Anymore input from others would be appreciated.

 

And in this era too. At least both my Zed and Christofire's 10R do. Oh what
joy we had when Chris's didn't too.


--
Beav

VN 750
Zed 1000
OMF# 19

 

Not a Kwak owner but I'd be surprised to learn that any electric pump
keeps running once the float chamber is full.

 

Using the patented Mavis Beacon "Hunt&Peck" Technique, Colin Irvine

<AOL>

<thinks>

Unless it's Italian.

--
Wicked Uncle Nigel - "He's hopeless, but he's honest"

WS* GHPOTHUF#24 APOSTLE#14 DLC#1 COFF#20 BOTAFOT#150 HYPO#0(KoTL) IbW#41
SBS#39 OMF#6 Enfield 500 Curry House Racer "The Basmati Rice Burner",
Honda GL1000K2 (Fallen apart) Suzuki TS250 "The Africa Single"
Norton 850 Commando Kawasaki GTR1400

 

He said "keeps running"

 

Using the patented Mavis Beacon "Hunt&Peck" Technique, Mark Olson

Good point, well made.

--
Wicked Uncle Nigel - "He's hopeless, but he's honest"

WS* GHPOTHUF#24 APOSTLE#14 DLC#1 COFF#20 BOTAFOT#150 HYPO#0(KoTL) IbW#41
SBS#39 OMF#6 Enfield 500 Curry House Racer "The Basmati Rice Burner",
Honda GL1000K2 (Fallen apart) Suzuki TS250 "The Africa Single"
Norton 850 Commando Kawasaki GTR1400

 

Lol! My query being are these pumps designed to cut off when pressure is
reach without them burning out?
They prime the float chambers then stall until the bowls start to empty and
kick in again ad infinitum?

Certain types of electric fuel pump are designed this way (facet for
example) and my concern is that without fuel flowing through the pump would
overheat.
The one im playing with at the mo does reach 3psi on the guage then slow and
stall until I release the pressure, just worried that because its an O.E
Kwak pump it`ll burn out if left under pressure for more than 30 secs.
Hence the question because if they are designed this way and come to no harm
stalling/starting then I dont need to worry about a pressure relief valve
dumping back into the tank to keep the pump from stalling.

 

Unless you get an absolute definitive answer then work on the balance
of probabilities - that the pump will be designed to stall, and that
if you put a relief valve in to keep the pump running it'll wear out
sooner than it might otherwise have done.

 

I know nothing about Kwacks, but is it one of those plunger/diaphragm
type pumps that ticks, or a rotary pump?

The former only consume power when they tick; they can be left as long
as you like otherwise.

 

<suspicious>

Is thinking allowed at this time of morning?

</s>

One other point: on many bikes, the fuel pump only runs for a few
seconds to prime the engine, then cuts out if the engine's not running
for safety reasons.

 

Ooh. Here's an idea.

Put a meter in series with the supply and see if it draws current when
it's not running. If it doesn't draw current then there's no risk of
burning out.

 

For safety reasons? Not just 'cos the float chambers are full?

 

No. Float valves can leak. Also, not all bikes have tilt switches. You
really don't want fuel continuously being pumped through if the bike's
been dropped or left unattended with the ignition on.

To fill the float bowls from completely empty on my old FZR600, I had
to turn the ignition on and off two or three times before the bowls
filled completely, because of the safety timer.

 

With no definitive answer forthcoming iv`e reached a compromise.
Iv`e made a pressure relief valve and fitted it inline (nice neat job and
basically a ball bearing in a sealed tube under spring tension) to dump fuel
back into the tank.
This is set to 2.5psi so with the pump armed it runs for a second to prime
the nos solenoid then cuts back to 1 tick every 2 seconds until the solenoid
is fired and recieves the full 2.5psi.
A compromise that keeps fuel running through the pump (in case they`re not
designed to stall completely) but gives me a constant pressure at the
solenoid.
Probably unneccessary as im edgeing towards the "designed to shut off camp"
but works fine and tested with a low psi gauge at the solenoid.
Thanks for the replys.

 

Ahhh.... the aussie spec fuel pump ;-)

 

Thanks. Useful to know.

 

Does this mean I don't need to go out to the garage then?

I'll have a listen tomorrow before I go out just to be sure.

 

Hey thanks Lady N x

 

An Alfa 75 2.5V6 (Fuel Injection) one will keep pumping without the
engine running after a **** of a dealer has fixed the relay by shorting
two connections with a scotchlock.


--

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