Yamaha F400A 2022 - Checking the Armature (Starter Motor); Checking the Brush Holder

5-47
Starter motor
4. Remove:
• Bracket
•Armature
•Brush holder
Do not scratch or damage the brushes
when removing the armature.
Checking the armature (starter motor)
1. Check the commutator for dirt. Clean with
600-grit sandpaper and compressed air if
necessary.
2. Check:
•Armature
Out of specification → Replace.
a. Measure the commutator diameter “a”.
b. Check the armature for continuity.
Checking the brush holder
1. Check:
• Brush holder continuity
Out of specification → Replace.
2. Measure:
•Brush length “a”
Out of specification → Replace.
Pipe “2”
(commercially available)
“a” = 12.0 mm (0.47 in)
“b” = 17.0 mm (0.67 in)
Standard commutator diameter
32.0 mm (1.26 in)
Wear limit
31.4 mm (1.24 in)
a
Armature for continuity
“a” “b” “c” “d”
Armature for continuity
“a” “b” “c” “d”
a. Standard brush length
b. Wear limit
a
b
c
d
b
a
d
c
ba