5 - 41
ENG
CYLINDER HEADS
REMOVING THE CYLINDER HEADS
1. Remove:
• cylinder head
NOTE:
• Loosen the nuts in the proper sequence.
• Follow the numerical order shown in the
illustration. Loosen each bolt 1/4 of a turn
at a time until all of the nuts are loose.
EAS00228
CHECKING THE CYLINDER HEADS
The following procedure applies to each
cylinder head.
1. Eliminate:
• combustion chamber carbon deposits
(with a rounded scraper)
NOTE:
Do not use a sharp instrument to avoid
damaging or scratching:
• spark plug bore threads
• valve seats
2. Check:
• cylinder head
Damage/scratches
→
Replace.
3. Measure:
• cylinder head warpage
Out of specification
→
Resurface the cyl-
inder head.
▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼
a. Place a straightedge
1
and a thickness
gauge
2
across the cylinder head.
b. Measure the warpage.
c. If the limit is exceeded, resurface the cyl-
inder head as follows.
Maximum cylinder head warpage
0.10 mm (0.0039 in)
5
Summary of Contents for XV16AL
Page 1: ...SERVICEMANUAL LIT 11616 12 56 4WM 28197 E0 XV16AL XV16ALC XV16ATL XV16ATLC ...
Page 43: ...SPEC 2 25 ENGINE OIL LUBRICATION CHART ENGINE OIL LUBRICATION CHART 2 ...
Page 49: ...SPEC 2 31 1 Transfer gear oil pump 2 Middle driven shaft TRANSFER GEAR OIL FLOW DIAGRAMS 2 ...
Page 216: ...ENG CONTENTS ENGINE ENGINE 5 1 INSTALLING THE ENGINE 5 8 5 ...
Page 348: ...CARB CHECKING THE AIR INDUCTION SYSTEM 6 26 INSTALLING THE AIR INDUCTION SYSTEM 6 26 6 ...
Page 377: ...6 29 CARB AIR INDUCTION SYSTEM 13 Install fuel tank Refer to FUEL TANK in chapter 3 6 ...
Page 415: ...7 37 ELEC SIGNALING SYSTEM EB806000 SIGNALING SYSTEM CIRCUIT DIAGRAM 7 ...
Page 448: ...PRINTED IN U S A YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN ...