Yamaha Tenere 700 2020, Service Manual

Page: 211 / 472

CYLINDER HEAD
5-24
EAS30276
REMOVING THE CYLINDER HEAD
1. Remove:
• Engine bracket bolts (left)
• Engine mounting bolt (left upper side)
• Engine bracket (left)
• Engine mounting bolt (front right side)
• Collar
TIP
Place a suitable stand under the engine.
2. Loosen:
• Engine mounting adjust bolt
TIP
Loosen the engine mounting adjust bolt using a
1/2 inch hexagon bit socket “1”.
3. Remove:
• Cylinder head bolt (M6) (
×
2)
• Cylinder head bolt (M10) (
×
6)
TIP
• Loosen the bolts in the proper sequence as
shown.
• Loosen each bolt 1/2 of a turn at a time. After
all of the bolts are fully loosened, remove them.
• M6
×
45 mm: “1”, “2”
• M10
×
100 mm: “3”–“8”
EAS30278
CHECKING THE TIMING CHAIN GUIDES
1. Check:
• Timing chain guide (exhaust side)
• Timing chain guide (intake side)
Damage/wear
→
Replace.
EAS30277
CHECKING THE CYLINDER HEAD
1. Eliminate:
• Combustion chamber carbon deposits
(with a rounded scraper)
TIP
Do not use a sharp instrument to avoid damag-
ing or scratching:
• Spark plug bore threads
• Valve seats
2. Check:
• Cylinder head
Damage/scratches
→
Replace.
• Cylinder head water jacket
Mineral deposits/rust
→
Eliminate.
3. Measure:
• Cylinder head warpage
Out of specification
→
Resurface the cylinder
head.
1
Warpage limit
0.05 mm (0.0020 in)
×2
×6
1
2
4
5
3
6
8
7
FWD