Yamaha 250GETO, Service Manual

Page: 117 / 293

6S35H11 5-30
9
8
7
6
5
4
3
2
1
Crankcase
2. Remove the crankshaft assembly.
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
.
S60V5730
1
2
6S350320
1
2
5
6
4
3
Checking the bearing
1. Check the bearings for pitting or rum-
bling.
Disassembling the crankshaft
1. Remove the seal rings
1
.
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.
c C
Do not reuse the ball bearing, always
replace it with a new one.
S60V5750
b
a
1
Gear puller
2
: 90890-06540
Bearing separator
3
:
90890-06534
S60V5760
2
3
6S35H11_05 9/2/05 10:35 AM Page 33