Suzuki GSX-R750 Service Manual page 341

7-10 ELECTRICAL SYSTEM
GENERATOR COIL RESISTANCE INSPECTION
• Remove the frame cover. ( 6-8)
• Disconnect the generator coupler.
Measure the resistance between the three lead wires.
Also check that the stator core is insulated.
If the resistance is not specified value, replace the stator with a
new one.
[ [
[ 09900-25008: Multi circuit tester set [ [
U U Tester knob indication: Resistance (Ω Ω Ω Ω Ω ) U
U U
Generator coil resistance: 0.2 – 0.5 Ω Ω Ω Ω Ω
NOTE:
When making above test, it is not necessary to remove the gen-
erator.
GENERATOR NO-LOAD PERFORMANCE INSPECTION
• Start the engine and keep it running at 5 000 r/min.
Using the multi circuit tester, measure the voltage between three
lead wires.
If the tester reads under the specified value, replace the genera-
tor with a new one.
[ 09900-25008: Multi circuit tester set [ [
[ [
V Tester knob indication: Voltage (∼ ∼ ∼ ∼ ∼ ) V V V V
Generator no-load performance:
More than 65 V at 5 000 r/min (When engine is cold)
REGULATOR/RECTIFIER INSPECTION
• Remove the frame cover. ( 6-8)
• Disconnect the regulator/rectifier couplers.
Using the multi circuit tester, measure the voltage between the
lead wires in the following table.
If voltage is incorrect, replace the regulator/rectifier.
[ [
[ 09900-25008: Multi circuit tester set [ [
  Tester knob indication: Diode test (= 
 
+
Probe of tester to:
B/R
B/R 0.4–0.7
B1 Approx. 1.5
B2 Approx. 1.5 Approx. 1.5
B3 Approx. 1.5 Approx. 1.5 Approx. 1.5
B/W Approx. 1.5 Approx. 1.5 Approx. 1.5 Approx. 1.5
B: Black, B/R: Black with Red tracer, B/W: Black with White tracer
NOTE:
If the tester reads under 1.4 V when the tester probes are not
connected, replace the battery of multi circuit tester.
= ) = =
=
B1 B2 B3
0.4–0.7 0.4–0.7
Approx. 1.5 Approx. 1.5
Approx. 1.5
Unit: V
B/W
0.5–1.2
0.4–0.7
0.4–0.7
0.4–0.7
B/W
B
1
B
B
1
2
B/R B
3