Disassembling The Piston And Connecting Rod Assembly; Checking The Bearing; Disassembling The Crankshaft - Yamaha 250GETO Service Manual

2. Remove the crankshaft assembly.
2
3. Remove the roller bearing 1 and main
bearing 2.
NOTE:
Be sure to keep the main bearings 2 in the
order as they were removed.
Disassembling the piston and con-
necting rod assembly
1. Remove the clips 1 with pliers, and then
remove the piston pin 2, needle bearing
3 and washers 4.
2. Remove the top ring 5 and 2nd piston
ring 6.
4
3
6S35H11
1
S60V5730
1
2
6
5
6S350320

Checking the bearing

1. Check the bearings for pitting or rum-
bling.

Disassembling the crankshaft

1. Remove the seal rings 1.
a
b
NOTE:
To remove the seal rings 1, widen the seal
ring end gap a, and then remove the ring
from the groove and remove the crankpin b.
2. Remove the upper ball bearing.
cC
Do not reuse the ball bearing, always
replace it with a new one.
Gear puller 2: 90890-06540
Bearing separator 3:
90890-06534
Crankcase
1
S60V5750
3
2
S60V5760
5-30
1
2
3
4
5
6
7
8
9