ENG
CRANKSHAFT AND CRANKCASES
DISASSEMBLING THE CRANKCASES
1. Remove:
• timing chain guide
1
• timing chain
2
• crankshaft sprocket
3
2. Remove:
• neutral switch wire
1
• bolt with washer
2
,
3
and
4
• engine bolts
5
to
C
•
Loosen each bolt 1/4 of a turn at a time, and
when all of the bolts are fully loosened, remove
them.
•
Loosen the bolts in stages and in a crisscross
pattern.
NOTE:
• M6 x 70 mm (2.76 in) bolts from
2
to
4
• M6 x 60 mm (2.36 in) bolts
5
,
6
• M6 x 55 mm (2.16 in) bolts
7
to
9
• M6 x 45 mm (1.77 in) bolts from
0
to
C
3. Remove:
• speed sensor
4. Remove:
• gearshift cam selector
Turn the gearshift cam selector segment
1
,
avoiding its contact with the crankcase during
separation.
NOTE:
Place the engine with the crankcase (LH) facing
down and use a screwdriver to separate the
crankcases.
NOTE:
3
2
1
1
5
0
A
1
C
7
8
6
9
2
3
4
B
5-71
5. Remove:
• crankcase (RH)
•
Use the screwdriver at the proper place.
•
The crankcase (LH) should remain below.
•
Separate the crankcases only after making
sure the gearshift cam segment is properly
placed.
CAUTION:
Summary of Contents for YBR250 2007
Page 1: ...YBR250 SERVICE MANUAL 5D1 F8197 E0 2007 ...
Page 2: ......
Page 359: ...YAMAHA MOTOR DA AMAZÔNIA LTDA ...
