Yamaha EF1000 Service Manual

							MAINTENANCE SPECIFICATIONS 
Engine 
PISTON 
Piston Clearance 
Piston Size D 
 
Mesuring  Point 
H 
PISTON PIN 
Piston Pin Dia 
 
PISTON  RING 
Top Ring 
Dimensions 
End  Gap 
 
Side  Clearance 
 
2nd  Ring 
Dimensions 
End  Gap 
 
Side  Clearance 
 
Oil Ring 
Dimensions 
End  Gap 
 
CYLINDER HEAD 
Warp Limit 
CYLINDER 
Bore Size 
CRANKSHAFT 
Unit 
mm(in) 
~H D 
mm (in) 
mm (in) 
~B 
mm(in) 
mm (in) 
[ 1 mm (in) 
Bill 
~r 
A 
Big  End Side  Clearance A 
Runout   B 
Crank Pin Dia C 
 
5-2 
SPECIFICATIONS I SPEC I u • 
EF1000 
0.020-0.035 (0.0008-0.0014) 
50.0 
(  1.969) 
49.93  (1.966) 
10 (0.4) 
12.0  (0.47) 
11.9 (0.468) 
1.5 X 2.0 (0.059 X 0.079) 
0.1-0.25 (0.004-0.01) 
0.9  (0.035) 
0.06  (0.0024) 
0.15  (0.006) 
1.5 X 2.0 (0.059 X 0.079) 
0.1-0.25 (0.004-0.01) 
0.9  (0.035) 
0.04  (0.0016) 
0.15  (0.006) 
2.5 X 2.1 (0.098 X 0.083) 
0.1-0.25 (0.004-0.01) 
0.9  (0.0354) 
0.5  (0.02) 
50.0 
(1.969) 
0.2-0.6 (0.008-0.024) 
0.02  (0.0008) 
22.0  (0.87) 
21.9 (0.86)  
						

							CONNECTING ROD 
Small End Dia A 
Big End  Dia B 
Oil Clearance 
 
CAMSHAFT 
Camshaft 
Outside Dia 
Cam 
Dimension 
II A 
JIB 
Camshaft Journal 
 
VALVE 
Valve Dimension 
Head  Dia A 
Stem  Dia B 
Length C 
Seat Width D 
 11811 
Valve  Clearance  (Cold) 
PUSH ROD 
Runout Limit 
Unit 
mm (in) 
mm (in) 
gJA 
8 
mm (in) 
L J 
c 
IN 
EX 
IN 
EX 
IN 
EX 
IN 
EX 
IN 
EX 
mm (in) 
SPECIFICATIONS I SPEC I rr-1 
EF1000 
12.0 
22.0 
0.016-0.034  (0.0006-0.0013) 
0.1 (0.004) 
IN 
EX 
20.5  (0.81)  20.5 (0.81) 
16.0  (0.63) 
16.0 (0.63) 
12.0  (0.472) 
11.9 (0.468) 
~D 
19.0  (0.75) 
17.0  (0.67) 
5.0  (0.2) 
5.0  (0.2) 
53.4 (2.10) 
53.6  (2.11) 
0.7 (0.03) 
0.7  (0.03) 
1.2 (0.047) goo 
0.1 (0.004) 
0.1 (0.004) 
0.5  (0.02) 
5-3  
						

							Unit 
VALVE SPRING mm (in) 
Free  Length 
 
Tilt Limit 
1t 
CARBURETOR mm(in) 
Type/Manufacturer 
Bore  Size 
Float Height 
r-M 
Generator,  Electrical 
GENERATOR 
Type 
Phase 
Number of Poles 
Excitation 
Initial Excitation 
Driving Method 
Rated Power Factor 
Frequency 
Fluctuation 
ELECTRIC 
Ignition System 
Pulser  coil resistance  (±10%) 
Charge 
coil resistance  (±10%) 
Ignition timing 
Primary coil resistance (±10%) 
Secondary coil resistance  (±20%) 
AC  excess 
current check 
DC excess current check 
Coil resistance (0±10%) 
Main coil at  20°C 
Sub coil at  20°C 
DC coil at 20°C 
Rotor coil at 20°C 
Number of rectifier 
Rotor rectifier resistance 
Normal direction 
Reverse direction 
Unit 
5-4 
SPECIFICATIONS I SPEC I u • I 
EF1000 
27.4 (1.08) 
24.4  (0.96) 
0.8 (0.031) 
BV15/MIKUNI 
15  (0.6) 
17 (0.67) 
EF1000 
Bruse-less, 
Condenser-exciting, AC generator 
Single 
2 
Self magnetization 
Residual magnetization 
Direct connection 
1.0 
Less than 5% 
C.D.I. 
380 
3500 
BTDC 23°/3,000-3,600 r/min 
0.230 
5.61 ko 
Protector 
Ptorector 
1.764  2.99 
0.433  4.11  1 
Continuity 
No continuity (infinite)  
						

							TIGHTENING TORQUE I SPEC I rr-1 
TIGHTENING TORQUE 
~I 
EF1000 
Thread  size 
Torque 
I Nm (m•kg, ft•lb) 
Cylinder head  M  6 X 1.0 11 (1.1, 8.0) 
Cylinder head cover M  6 x 
1.0  10 (1.0, 7.2) 
Crankcase 
cover M  6 X 1.0  10 (1.0, 7.2) 
Spark plug M14 X 1.25 20 (2.0, 14.5) 
Fan  case  M 
6 
X 1.0  7 (0.7, 5.1) 
Connecting 
rod M 6 X 1.0  9 (0.9, 6.5) 
Flywheel magneto M12 x 1.25  40 (4.0, 29) 
Governor arm M  6 X 1.0 
6 (0.6, 4.3) 
Fuel cock  M  6 X 1.0 
4 (0.4, 2.9) 
Rotor 
assy M  8 X 1.25 21 (2.1, 15.2) 
Stator assy M  6 X 1.0  10 (1.0, 7.2) 
Rocker 
arm lock nut M  6 X 0.5  10 (1.0, 7.2) 
Muffler nut M 6 X 1.0 7(0.7,5.1) 
5-5  
						

							GENERAL TORQUE SPECIFICATIONS/ I SPEC I u • I 
DEFINITION  OF UNITS _  .  _ 
GENERAL 
TORQUE 
SPECIFICATIONS 
This  chart  specifies torque for standard  fasteners 
with standard I.S.O. pitch threads.  Torque specifi­
cations 
for special components or assemblies  are 
included in the applicable sections of this book. 
To avoid  warpage, tighten multifastener  assem­
blies in a crisscross  fashion, in progressive  stages, 
until full torque is reached. Unless otherwise 
specified,  torque specifications 
call for clean, dry 
threads. 
Components should be  at room  tem­
perature. 
Thread size 
M4 
M5 
M  6 
M7 
M8 
M10 
M12 
DEFINITION OF UNITS 
Unit Read Definition 
mm Millimeter 10-3 meter 
em Centimeter 10-2 meter 
kg Kilogram 103 gram 
N Newton 1 kg x m/sec2 
Nm Newton meter Nxm 
m•kg Meter kilogram mxkg 
Pa Paskal N/m2 
N/mm Newton per millimeter N/mm 
L Liter 
cm3 Cubic centimeter -
r/min Rotation per minute -
5-6 
Tightening torque 
Nm m • kg ft•lb 
2 0.2 1.4 
3 0.3 2.2 
7 0.7 5.1 
10  1.0 7.2 
15  1.5 
10.8 
30  3.0 
21.7 
60 6.0 43.4 
Measure 
Length 
Length 
Weight 
Force 
Torque 
Torque 
Pressure 
Spring rate 
Volume or Capacity 
Engine speed  
						

							HOSE ROUTING 
CD Carburetor air venthose 
@ Fuel tank breather hose 
HOSE  ROUTING I SPEC I g • I 
5-7  
						

							1 PC.