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(7) CHAIN GUIDE
Mount the chain guide to the crankcase.
Fig. 5-39b
Model EX21
mounting position
Models EX13, 17 and
27 mounting positions
CHAIN GUIDE
Fig. 5-39a
(8) CYLINDER HEAD
Inspect and repair any scratches on mounting surface and replace head gasket to new one before installing.
Tighten the cylinder head bolts in diagonal order.
(1) Re-use (Oil the screw thread)
Tighten all bolts (5pcs) by 18 ± 1 N m primary,
and then tighten longer ones (M8
× 68mm flange
bolt: 4pcs) by 26 ± 1 N m.
(2) When replace to new cylinder head and flange
bolts (Oil the screw thread)
Tighten all bolts (5pcs) by 18 ± 1 N m primary,
and then tighten longer ones (M8
× 68mm flange
bolt: 4pcs) by 29 ± 1 N m.
Fig. 5-40
PIPE KNOCK
PIPE
KNOCK
GASKET
CYLINDER HEAD
M8 x 35 BOLT : 1 pc.
M8 x 68 BOLT : 4 pcs
.
1
2
3
4
5
1
2
3
4
Cylinder head bolts
Tightening Torque
Remarks
1
st
step 2
nd
step
M8 × 68mm
flange bolt : 4 pcs.
17.0 - 19.0 N m
(170 - 190 kgf cm)
(12.3 - 13.7 ft lb.)
25.0 - 27.0 N m
(250 - 270 kgf cm)
(18.1 -19.5 ft lb.)
Re-use
28.0 - 30.0 N m
(280 - 300 kgf cm)
(20.3 - 21.7 ft lb.)
When replace to new cylinde
r
head and flange bolts
M8 × 35mm
flange bolt : 1 pc.
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