Removal; Inspection - Yamaha VK540EF Service Manual

CYLINDER HEAD AND CYLINDER
ESS00160

REMOVAL

1. Remove:
S Piston pin clips
S Piston pins
S Pistons
S Small end bearings
NOTE:
S Before removing the piston pin clip, cover the
crankcase with a clean rag so that you will not
accidentally drop the clip into the crankcase.
S Before removing the piston pin, deburr the clip
groove and pin hole area. If the piston pin
groove is deburred and the piston pin is still dif-
ficult to remove, use the piston pin puller.
S Put identification marks on each piston head
for reference during reinstallation.
CAUTION:
Do not use a hammer to drive out the piston
pin out.
1 Piston pin
2 Piston
3 Piston pin puller
ESS00161

INSPECTION

1. Eliminate:
S Carbon deposits
CAUTION:
Do not use a sharp instrument. Avoid dam-
aging or scratching the surface.
2. Measure:
S Cylinder head warpage
S Straight edge 1
S Thickness gauge 2
5-6
Piston pin puller:
90890-01304, YU-01304
(from the combustion chamber)
Use the rounded scraper 1 .
Out of specification ! Resurface.
Warpage limit:
0.03 mm (0.0012 in)
ENG