BMW K 1100 LT/RS Repair Manual page 114

Starter turns too slowly, does not crank en-
gine.
no
Check battery voltage.
Is battery voltage too low?
no
Check battery terminals.
Are terminals loose or oxidised?
no
Check connections.
Are connections loose?
no
Check collector.
Is collector dirty?
no
Check armature winding.
Is armature winding defective?
Starter turns at high speed.
Engine stops or turns only sporadically.
no
Check drive pinion. Is drive pinion defective?
Is shift lever broken?
Drive pinion does not engage.
Starter turns idle at high speed.
no
Check drive pinion.
Is drive pinion excessively dirty?
12.28
yes
Charge battery, replace if necessary.
yes
Clean poles and terminals, firmly tighten.
yes
Secure connections.
yes
Clean collector.
yes
Repair starter.
yes
Repair starter.
yes
Repair starter.