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1985 Xv 1000 fuel pump issue?

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paul
Posts: 4
Joined: Sat May 23, 2020 2:13 pm
Location: Newfoundland
What Virago you Own: 1985 Xv1000
1984 xv 750

1985 Xv 1000 fuel pump issue?

Post by paul » Tue Sep 13, 2022 7:56 pm

So bike runs magnificent all summer, however part way through the season I notice a change in the fuel pump sound. Every time ignition is turned on fuel pump runs the complete long cycle, not it’s regular 2 blips after initial start. Still didn’t cause me any concern as it ran great, until I ran low on gas and had to switch to reserve.bike then cut out on front cylinder and would not start after and fuel pump flooded the carbs to the point of gas’s running out the breather!!! Is it possible for the pump to “push” fuel back through full carb bowls? It has new (3-4yrs) needles and seats …do I need a new pump, do I need a new controller? Do I have a pc of dirt preventing the needle from fully seating? Any thoughts or ideas would be great!!!

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ViragoJoe
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Posts: 3475
Joined: Wed May 20, 2015 10:36 am
Location: S.E. Michigan, USA
What Virago you Own: 1996 Virago Special XV1100SH

Re: 1985 Xv 1000 fuel pump issue?

Post by ViragoJoe » Wed Sep 14, 2022 4:40 pm

paul wrote:
Tue Sep 13, 2022 7:56 pm
So bike runs magnificent all summer, however part way through the season I notice a change in the fuel pump sound. Every time ignition is turned on fuel pump runs the complete long cycle, not it’s regular 2 blips after initial start. Still didn’t cause me any concern as it ran great, until I ran low on gas and had to switch to reserve.bike then cut out on front cylinder and would not start after and fuel pump flooded the carbs to the point of gas’s running out the breather!!! Is it possible for the pump to “push” fuel back through full carb bowls? It has new (3-4yrs) needles and seats …do I need a new pump, do I need a new controller? Do I have a pc of dirt preventing the needle from fully seating? Any thoughts or ideas would be great!!!
============

paul,

For the carburetors to flood as you say. Chances are that the float needle and seats are not stopping the fuel when the float Bowls are full of fuel. The float can be stuck on the side of the float bowl well. Place the bike on the center stand and tap the float bowl well with a screw driver handle lightly and see if that stops the fuel flow.

Also the float itself may have a leak in it and sinks to the bottom of the float bowl well.

There shouldn't be any dirt in the float bowl chamber for you have a fuel filter up stream on the fuel pump. Has it ever been changed?

I don't believe the fuel pump is the culprit at this point. They seldomly fail.
There are fuel pump repair kits available. In your browser search for Fuel Pump Repair Kit Tour Max fps-900.
ViragoJoe 🇺🇸
1996 XV1100SH Virago Special
"Never ride faster than your Guardian Angel can fly!!"
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paul
Posts: 4
Joined: Sat May 23, 2020 2:13 pm
Location: Newfoundland
What Virago you Own: 1985 Xv1000
1984 xv 750

Re: 1985 Xv 1000 fuel pump issue?

Post by paul » Wed Sep 14, 2022 5:50 pm

Thanks for the info Joe, guess I should pull them off and have a look. Just finished doing my sons xv750 carbs after it sat for 6 yrs (man they were nasty!), it just pains me To have to do it all over again so soon lol

paul
Posts: 4
Joined: Sat May 23, 2020 2:13 pm
Location: Newfoundland
What Virago you Own: 1985 Xv1000
1984 xv 750

Re: 1985 Xv 1000 fuel pump issue?

Post by paul » Mon Sep 19, 2022 1:04 pm

Took the carbs off, no issue-nothing stuck. Bench tested float heights -all good. Needles seemed to seat well with full bowls- could not blow back through main lines. Put it all back together and fired right up- only to flood out again shortly after… I just don’t understand it. Fuel pump seems “over active”. As soon as I hit the starter button I can hear it going through it’s full 5-6 second cycle, even when the bowls are full… :(

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