BMW K100 LT Bedienungsanleitung Seite 10

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If your injector is leaking internally or failing to close fully the bike might run OK
depending on just how bad the problem is. The way to check for this problem is
simple. When you change spark plugs inspect them. If one or two are a lot blacker
then the others you probably have a leaking injector on those cylinders. If the leak is
bad or the injector never closes, the bike will run poorly at low RPM but improve at
high RPM when the engine is sucking in enough air to burn the fuel.
The most common injector problem and the most difficult to detect is the partially
clogged or "dirty" injector. Unfortunately there is no practical way to check for this
problem without pulling out the injectors so we need to use the process of elimination.
If you have checked everything else out and your bike still has some running problem
then it's probably one or more dirty injectors. Putting injector cleaner in the fuel tank
will not clean the injectors. To clean them they need to be pulled out and sent to an
injection shop. Most injection shops have a service that will include ultrasonic
cleaning, new tips and intake screens for about $25-$35 dollars for each injector.
THERE IS NO SUCH THING AS A REBUILT LE-JETRONIC INJECTOR! .
That's it! The life limiting component is the internal O ring and it can't be replaced.
Air flow meter:
When the engine revs under 900rpm, the
EFI computer doesn’t take into account
all the data collected by the air flow
meter. It collects only the air temperature
and adjusts the fuel injection
accordingly. (The air temperature sensor
is a small thermi-resistor located in the
mouth of the airflow meter).
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