3-43
1
2
3
4
5
6
7
8
9
10
ENGINE
PISTON, CAMSHAFT, CRANKCASE, AND CRANKSHAFT
2.
Apply the engine oil to the inside of the connecting rod
small end.
3.
Install:
• Piston “1”
• Piston pin “2”
• Piston pin circlips “3”
TIP
• Make sure that the “YAMAHA” mark “a” on the con-
necting rod faces toward the crankcase cover.
• Make sure that the “ ” mark “b” on the piston head
faces toward the push rod.
• Install the piston pin circlips so that the clip ends are
45
“c” or more from the cutout in the piston.
INSTALLING THE CRANKSHAFT
1.
Make sure that the end gap of each piston ring is
positioned correctly, as shown in the illustration.
2.
Install:
• Piston with the connecting rod “1”
3.
Attach:
• Piston ring compressor “1”
TIP
Attach the piston ring compressor to the piston, and then
insert the piston into the cylinder.
b
a
1
3
2
c
1
2
3
New
45˚
90˚
90˚
90˚
a
b
c
d
a. Lower oil ring rail
b. 2nd ring
c. Upper oil ring rail
d. Top ring, oil ring expander
1
1
Piston ring compressor:
YM-08037, 90890-05158
Summary of Contents for MX250
Page 2: ...7VE F8197 10_Cover indd 2 2017 03 16 16 24 50 ...
Page 86: ...5 1 1 2 3 4 5 6 7 8 9 10 ELECTRICAL ELECTRICAL CIRCUIT DIAGRAM B B B B B B B B W Y 1 2 3 4 5 ...
Page 100: ...6 6 1 2 3 4 5 6 7 8 9 10 TROUBLESHOOTING GOVERNOR OPERATION MEMO ...
Page 116: ...7 16 1 2 3 4 5 6 7 8 9 10 SPECIFICATIONS WIRE ROUTING DIAGRAM TCI UNIT ...
Page 120: ...APPENDIX CIRCUIT DIAGRAM B B B B B B B B W Y 1 2 3 4 5 ...
Page 122: ...MEMO ...
Page 123: ...7VE F8197 10_Cover indd 2 2017 03 16 16 24 50 ...
