Hey Folks, I have a 2010 GSA twin cam with a fuelling issue - all fully disclosed on purchase, so no issue there. Im told that when the bike runs low on fuel to lean the bike over to the left and it will run for longer (filling up the LHS of the tank with more fuel, i guess). Anyhow Im going to have a go at resolving this myself. I believe the pump on the LHS of the tank differs from the pump on the RHS of the tank. Clearly its the RHS that is the issue. Does anyone know what this pump is called on Motorworks? So i can look to order the correct parts. Or point me in a better direction for repair? Cheers Tim
GSA fuel issue
- Thread starter Lightweight Tim
- Start date
I’m sure the earlier bikes had a syphon pump arrangement, from right to left
I’m not a 1200 aficionado, but I had a quick look through Motorworks with the filters for the year of your bike.
Looks like this is what you’re after :
https://www.motorworks.co.uk/additional-fuel-pump-fue05636-1.html
but would recommend giving them a call. They’re a helpful bunch
Looks like this is what you’re after :
https://www.motorworks.co.uk/additional-fuel-pump-fue05636-1.html
but would recommend giving them a call. They’re a helpful bunch
Thanks both. I never thought of giving them a call. HahaI’m not a 1200 aficionado, but I had a quick look through Motorworks with the filters for the year of your bike.
Looks like this is what you’re after :
https://www.motorworks.co.uk/additional-fuel-pump-fue05636-1.html
but would recommend giving them a call. They’re a helpful bunch
Thanks for the reply.
The pump on the right tank of the GSA is a simple jet pump which works using the fuel from the returns line from the fuel pressure regulator.
If the fuel pump in the left side of the tank is getting weak there will not be any return flow to drive the jet pump.
First check there are not any trapped pipes under the tank and check the fuel pressure . From the pump it should be above 100psi and after the Fuel pressure regulator 60 psi ( 4Bar) on a 2010 bike.
If the fuel pump in the left side of the tank is getting weak there will not be any return flow to drive the jet pump.
First check there are not any trapped pipes under the tank and check the fuel pressure . From the pump it should be above 100psi and after the Fuel pressure regulator 60 psi ( 4Bar) on a 2010 bike.
My explanation may sound a bit vague here is a you tube clip with a better explanation.
It's funny you should mention this..
My BMW car has started running out of fuel when it still has about 15 litres left and I suspect it's as you described above.
Fuel is not being pumped from one side of the tank to the other.
2003 E46 330ci Msport coupé.
I'll get a new pump fitted when I start riding again about march time.
If you are replacing the pump be aware the cheap pumps from ebay as they have a small orifice in the pleasure relief valve built into the pump and tend to swamp the fuel pressure regulator.
I have tried other pumps without a lot of success ( Consistent performance and longevity) My fault for monitoring them with a gauge on the dash.
For the past year I have been using a Quantum pump which seems to be doing ok at the moment.
Prefer to monitor the fuel pressure rather than have it run lean and burn exhaust valves.
I have tried other pumps without a lot of success ( Consistent performance and longevity) My fault for monitoring them with a gauge on the dash.
For the past year I have been using a Quantum pump which seems to be doing ok at the moment.
Prefer to monitor the fuel pressure rather than have it run lean and burn exhaust valves.
Thanks for all of your advise. Motorworks were great and gave the jet pump reference - although they couldn’t supply one they suggested any main BM dealer, it’s about 90£ new. As you say I’ll check the pipes and the pressure first before I order anything. Cheers
There is nothing to go wrong with the jet / transfer pump except a lack of fuel from the pressure regulator returns to drive it.
First thing I would check if you do not have a pressure gauge is that you have a good flow of return fuel at the jet pump .
Just pull the appropriate pipe of the pump on the right hand side of the tank to see if you have good flow with the bike running.
If non or limited flow from the pressure regulator return, then the main fuel pump is on its last legs.
First thing I would check if you do not have a pressure gauge is that you have a good flow of return fuel at the jet pump .
Just pull the appropriate pipe of the pump on the right hand side of the tank to see if you have good flow with the bike running.
If non or limited flow from the pressure regulator return, then the main fuel pump is on its last legs.
Thanks again, you made it sound easy but i suspect it’s above my pay grade. Apart from this the bikes nearly ready for the summer, so i suspect ill part with some hard earned to resolve
Thanks again
Thanks again
Good time for a thread resurrection.
As I posted above my car has been doing the same.
It would run out with anything from 10-15 litres in the tank.
New fuel pump fitted now.
It now uses all the fuel in the tank.
The Venturi jet pump didn't need replacing. As said above not much to go wrong in them. It was just the low fuel return pressure that causes them to fail.
I'm sure my car pump was cheaper than the bike one though.
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