Engine - Engine and crankcase
Exhaust valves (For 770 EX/EX Magnum)
Valve head diameter
41.00 – 41.25 mm
(
1.61 –
1.62 in
)
Valve stem diameter
7.985 – 8.000 mm
(
0.314 –
0.315 in
)
Face angle
45° 30’±7’
Tappet clearance (Cold)
0.300 mm
(
0.012 in
)
Cam lift
6.1277 mm
(
0.2412 in
)
Valve lift
10.8679 mm
(
0.4279 in
)
Intake valves (For 770 EX/EX Magnum)
Valve head diameter
43.300 – 45.500 mm
(
1.705 –
1.791 in
)
Valve stem diameter
7.985 – 8.000 mm
(
0.314 –
0.315 in
)
Face angle
60° 30’±7’
Tappet clearance (cold)
0.300 mm
(
0.012 in
)
Cam lift
5.8885 mm
(
0.2318 in
)
Valve lift
10.4437 mm
(
0.4112 in
)
Valve springs (For 770 EX/EX Magnum)
Number per valve
1
Free length
44.600 mm
(
1.756 in
)
Length loaded at
26.1 – 28.9 kg
(
57.5 – 63.7 lb
)
34.000 mm
(
1.339 in
)
Length loaded at
51.2 – 56.5 kg
(
112.9 – 124.6 lb
)
23.800 mm
(
0.937 in
)
Valve timing (For 770 EX/EX Magnum)
Intake opening (before top dead centre)
15°
Intake closing (after bottom dead centre)
45°
Exhaust opening (before bottom dead centre)
56°
Exhaust closing (after top dead centre)
26°
Valve inserts (For 770 EX/EX Magnum)
Valve guide OD
13.933 – 14.016 mm
(
0.549 –
0.552 in
)
Valve guide oversize
0.200 mm
(
0.008 in
)
Valve guide interference fit in housing cylinder head
0.0050 – 0.0500 mm
(
0.0002 –
0.0020 in
)
Valve guide fitted ID after reaming
8.023 – 8.043 mm
(
0.316 –
0.317 in
)
Valve stem clearance in guide
0.0230 – 0.0580 mm
(
0.0009 –
0.0023 in
)
Maximum wear clearance
0.130 mm
(
0.005 in
)
Maximum valve stem eccentricity over one revolution with stylus on sealing face
0.030 mm
(
0.001 in
)
Engine - Torque
Tightening torques
Description
Thread size
Torque
Angle
Capscrew, cylinder head ( C1)
M12
X
1.25
40 N·m
(
354 lb in
)
130°±5 + 140°± 5
Capscrew, main bearing caps (C2)
M14
X
1.25
80 N·m
(
708 lb in
)
90°
Capscrew, timing cover and case (C3)
M12
X
1.25
40 N·m
(
354 lb in
)
-
Capscrew, connecting rod caps (C4)
M11
X
1.25
40 N·m
(
354 lb in
)
60°
Capscrew, flywheel (C5)
M12
X
1.25
40 N·m
(
354 lb in
)
60°
48190544 26/09/2017
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Summary of Contents for 770 EX
Page 5: ...INTRODUCTION 48190544 26 09 2017 1 Find manuals at https best manuals com ...
Page 31: ...SERVICE MANUAL Engine 770EX Magnum 770EX 48190544 26 09 2017 10 ...
Page 33: ...Engine 10 Engine and crankcase 001 770EX Magnum 770EX 48190544 26 09 2017 10 1 10 001 1 ...
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