petrol pump / fuel pump

Fuel pump for the injection system

The electric fuel pump ensures that there is always enough fuel available for the injection system. The fuel pressure is limited by the pressure regulator in the injection. The injection system allocates the fuel to the individual cylinders / injectors.
The fuel pump or fuel pump is subject to wear due to the high stress, which can cause defects.

Possible defects of an electric fuel pump

Too little or no fuel is delivered:
The fault is manifested by a lack of engine power, misfiring, engine judder or the motorcycle engine stalls, does not start at all.
 
The cause may be a mechanical or electrical defect.
A contamination / blockage of the fuel line (filter) is also to be considered.
Remedy is only possible by checking the fuel line system, the injectors and checking the fuel pump.
A fuel filter change is also recommended.
There may also be a defect in the pressure regulator.
 
The first signs of a faulty fuel pump or fuel pump can be slow starting, followed by jerking and then normal acceleration.
The same applies to sudden loss of power while driving, or engine judder at full throttle.
Noises such as whining and squealing are also the first signs of a pump problem. 
 
Our fuel pumps are from the accessories but are manufactured in OEM quality.
The pumps generate up to approx. 3.6 bar and a flow rate of approx. 85 - 115 l/hour. (depending on motorcycle model)

Fuel pumps for carburetor systems

On a motorcycle, the tank is normally located above the engine and the power unit is installed below the fuel tank.
Here, the downdraft fuel system takes over the fuel supply by gravity.
Because the tank is awkwardly shaped, without a pump the last liters remain unused or is installed under the seat, for example, a fuel pump is required.
There are mechanical fuel pumps that are often controlled by vacuum and electric pumps installed as standard.
As standard, for conversions and for retrofitting carburetor engines, pumps with max. 0.3 - 0.4 bar and a delivery rate of approx. 70 liters/hour are completely sufficient.
Higher pressures should be avoided, as the needle float valve of the carburetor no longer seals and the carburetor then overflows.
The pumps switch off at the appropriate back pressure.
 
If the pressure of the fuel pump is higher, there are also pressure reducers that can be connected upstream of the carburetor. Only at 1 bar pressure and at 80 L/h you are wrong with carburetors even with pressure regulators.
To lower the pressure to 0.3 bar, too little fuel arrives at the carburetor due to the diverted fuel quantity.

Retrofit fuel filter:

A fuel filter strainer should always be installed after the fuel pump on pumps. Before the fuel pump, the strainer from the fuel tap is sufficient. The gaps have no problem with smaller pieces of dirt and let them through. But a clogged filter will cause the destruction of the impeller of the pump due to cavitation.
 
Our fuel pumps are from the accessories and are based on the originals. They generate a pressure of about 0.25 - 0.35 bar at a flow rate of 50 - 85 l / hr. ( depending on the particular motorcycle model )

Collection of terms:

Fuel pump Fuel pump defective, How to recognize a defective fuel pump, Test fuel pump, Retrofit carburetor fuel pump, Conversion mechanical - electric fuel pump, Noise, howling, howling.