Yamaha TMAX XP530E-A 2017, Руководство по обслуживанию

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CYLINDER AND PISTONS
5-26
EAS30289
REMOVING THE PISTON
The following procedure applies to all of the pis-
ton.
1. Remove:
•
Piston pin clips “1”
• Piston pin “2”
•
Piston “3”
NOTICE
ECA13810
Do not use a hammer to drive the piston pin
out.
TIP
•
Before removing the piston pin clip, cover the
crankcase opening with a clean rag to prevent
the piston pin clip from falling into the crank-
case.
•
For reference during installation, put an identi-
fication mark on each piston crown.
•
Before removing the piston pin, deburr the pis-
ton pin clip’s groove and the piston’s pin bore
area. If both areas are deburred and the piston
pin is still difficult to remove, remove it with the
piston pin puller set “4”.
2. Remove:
•
Top ring
• 2nd ring
• Oil ring
TIP
When removing a piston ring, open the end gap
with your fingers and lift the other side of the ring
over the piston crown.
EAS30291
CHECKING THE CYLINDERS AND PISTONS
The following procedure applies to all of the cyl-
inders and pistons.
1. Check:
• Piston wall
•
Cylinder wall
Vertical scratches

Replace the cylinder,
piston and piston rings as a set.
2. Measure:
•
Piston-to-cylinder clearance
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Measure cylinder bore with the cylinder bore
gauge.
TIP
Measure cylinder bore by taking side-to-side
and front-to-back measurements of the cylinder.
b. If out of specification, replace the cylinder,
piston and piston rings as a set.
Piston pin puller set
90890-01304
Piston pin puller
YU-01304
Bore
68.000–68.010 mm (2.6772–
2.6776 in)
Wear limit
68.060 mm (2.6795 in)
Bore = maximum of D
1
, D
2
, D
3
, D
4
, D
5
, D
6