SPECIFICATIONS
General Specifications
|
XJ750RH |
|
|
Basic color |
New Yamaha Black or Brilliant Red |
|
Dimensions: |
|
|
Overall length |
2,110 mm (83.1 in) |
|
Overall width |
860 mm (33.9 in) |
|
Overall height |
1,120 mm (44.1 in) |
|
Seat height |
775 mm (30.5 in) |
|
Wheel base |
1,445 mm (56.9 in) |
|
Minimum ground clearance |
140 mm (5.5 in) |
|
Caster (steering head angle) |
28° |
|
Trail |
114 mm (4.49 in) |
|
Weight: |
|
|
Net |
218 kg (480 lb) |
|
Engine: |
|
|
Type |
D.O.H.C. air-cooled, gasoline |
|
Bore x stroke x cylinders |
65.0 x 56.4 mm x 4 (2.559 x 2.220 in x 4) |
|
Displacement |
748 cc (45.64 cu.in) |
|
Compression ratio |
9.2 : 1 |
|
Lubrication: |
|
|
Lubrication system |
Pressure lubricated, wet sump |
|
Delivery pump type |
Trochoid |
|
Carburetion: |
|
|
Manufacture |
HITACHI |
|
Type |
HSC32, constant velocity |
|
Rated venturi size |
25.3 mm (0.996 in) |
|
Air filter: |
Dry type element |
|
Ignition: |
|
|
Type |
Battery ignition (Full transistor ignition) |
|
Spark plug |
BP7ES (NGK) or W22EP (ND) |
|
Charging: |
|
|
Type |
Three-phase, regulated alternator |
|
Manufacture, I.D. No. |
HITACHI, LD119-08 |
|
Maximum output |
14V 19A |
|
Battery type |
YB14L-A2 |
|
Battery dimensions |
89 x 116 x 134 mm (3.50 x 6.54 x 5.28 in) |
|
Regulator/Rectifier |
S8534, I.C. type, full wave |
|
Regulating voltage (No. load) |
14.2-14.8V |
|
Starting: |
Electric starter |
|
Primary drive: |
|
|
Type |
Spur gear |
|
Teeth, ratio |
97/58 1.672 |
|
Clutch: |
Wet, multiple disc |
|
Transmission: |
|
|
Type |
Constant mesh, 5-speed drum shifter |
|
Teeth, ratio 1st |
35/16 2.187 |
|
2nd |
30/20 1.500 |
|
3rd |
30/26 1.153 |
|
4th |
28/30 0.933 |
|
5th |
26/32 0.812 |
|
XJ750RH |
|
|
Secondary type: |
|
|
Type |
Shaft drive |
|
Transmission output: |
|
|
Type, teeth, ratio |
Spur gear, 49/36,1.361 |
|
Middle gear case: |
|
|
Type, teeth, ratio |
Bevel gear, 19/18, 1.055 |
|
Final gear case: |
|
|
Type, teeth, ratio |
Bevel gear, 32/11, 2.909 |
|
Chassis: |
|
|
Frame |
Tubular steel double cradle |
|
Suspension: Front (type, travel) |
Telescopic fork (Pneumo-mechanical) |
|
|
150 mm (5.91 in) |
|
Rear (type, travel) |
Swing arm, 80 mm (3.15 in) |
|
Tires: Front |
3.25H19-4PR,Tubeless |
|
Rear |
120/90-18 65H,Tubeless |
|
Brakes: Front |
Dual hydraulic disc |
|
Rear |
Drum brake |
|
Fuel tank: Total |
19 lit (5.0 US. gal) |
|
Reserve |
4.1 lit (1.08US.gal) |
|
Wheels: Front |
MT1.85 x 19, Cast Aluminum |
|
Rear |
MT2.15 x 18, Cast Aluminum |
Maintenance Specifications
1. Engine
Engine oil capacity:
Total amount 3,500 cc (3.70 US.qt)
Oil and filter change 2,800 cc (2.96 US.qt)
Oil change 2,500 cc (2.64 US.qt)
Recommended lubricant:
If temperature does not go below 5°C (40°F) SAE 20W/40 SE motor oil
If temperature does not go above 15°C (60°F) SAE 10W/30 SE motor oil
Cranking pressure (at seal level): 11 kg/cm2 (156 psi)
Maximum difference between cylinders: 1 kg/cm2 (14 psi)
Camshafts:
|
Dimensions |
Standard size |
Wear limit |
|
|
Intake |
A |
36.80 mm (1.449 in) |
36.65 mm (1.443 in) |
|
B |
28.00 mm (1.102 in) |
27.85 mm (1.096 in) |
|
|
C |
8.80 mm (0.346 in) |
- |
|
|
Exhaust |
A |
35.80 mm (1.449 in) |
35.65 mm (1.404 in) |
|
B |
28.00 mm (1.102 in) |
27.85 mm (1.096 in) |
|
|
C |
7.80 mm (0.307 in) |
- |
|
Camshaft bearing, surface diameter: 24.967 ~ 24.980 mm (0.9830 ~ 0.9835 in)
Camshaft-to-cap clearance:
Standard 0.020 ~ 0.054 mm (0.0008 ~ 0.0021 in)
Maximum 0.160 mm (0.006 in)
Camshaft runout limit 0.1 mm (0.004 in)
Valve spring:
Allowable tilt from vertical
|
|
Inner Intake/Exhaust |
Outer Intake/Exhaust |
|
Free length |
35.9 mm (1.413 in) |
39.5 mm (1.555 in) |
|
Spring rate |
2.36 kg/mm (132.2 lb/in) |
4.58 kg/mm (256.5 Ib/in) |
|
Installed length (valve closed) |
31.0 mm (t.220 in) |
34.0 mm (1.339 in) |
|
Installed pressure (valve closed) |
9.0 kg (19.81b) |
19.1 kg (42.1 lb) |
|
Compressed length (valve open) |
IN: 22.5 mm (0.886 in) EX: 23.5 mm (0.925 in) |
IN: 25.5 mm (1.004 in) EX: 26.5 mm (1.043 in) |
|
Wire diameter |
2.8 mm (0.110 in) |
3.9 mm (0.154 in) |
|
Number of windings |
7.75 |
6.0 |
|
Winding O.D. |
20.6 (+0.3 -0) mm |
29.4 (+0 -0.3) mm |
Valves:
Valve stem run-out maximum 0.03 mm (0.0012 in)
Valve seat width standard/maximum: 1.0 mm (0.0039 in)/2.0 mm (0.080 in)
INTAKE
|
Clearance (Cold engine) |
0.11 ~0.15mm |
|
"A" head diameter |
33 ±0.1 mm |
|
"B" face width |
2.3 mm |
|
"C" seat width |
1.0 ±0.1 mm |
|
"D" margin thickness (minimum) |
1.2 ±0.2 mm |
|
Stem diameter (O.D.) |
7-0.010 -0.025 mm (0.2756 -0.0004 _0.0010 in) |
|
Guide diameter (I.D.) |
7+0.012 -0 mm (0.2756 +0.0005 -0 in) |
|
Stem-to-guide clearance |
0.010 ~ 0.037 mm |
EXHAUST
|
Clearance (Cold engine) |
0.16~0.20mm (0.006 ~0.008 in) |
|
"A" head diameter |
28 ±0.1 mm (1.2205 ±0.0039 in) |
|
"B" face width |
2.3 mm (0.0906 in) |
|
"C" seat width |
1.0 ±0.1 mm (0.0394 ± 0.0039 in) |
|
"D" margin thickness (minimum) |
1.0 ± 2.0 mm (0.0392 ± 0.0079 in) |
| Stem diameter (O.D.) |
7 -0.025 -0.040 mm (0.2756 -0.0010 _0.0016 in) |
| Guide diameter (I.D.) |
7+0.012 -0 mm (0.2756 +0.0005 -0 in) |
| Stem-to-guide clearance | 0.025 ~ 0.062mm (0.0010 ~ 0.0020 in) |
|
Cylinder and piston: |
|
|
Cylinder material |
Aluminum alloy |
|
Cylinder liner |
Pressed in; special cast iron |
|
Bore size: Standard |
65.00 mm (2.5591 in) |
|
Wear limit |
65.10 mm (2.5630 in) |
|
Cylinder taper limit |
0.05 mm (0.0020 in) |
|
Cylinder out-of-round limit |
0.01 mm (0.0004 in) |
|
Piston clearance: Standard |
0.030 ~ 0.050 mm |
|
Maximum |
0.1 mm (0.0039 in) |
|
Piston ring: |
Top |
2nd |
Oil |
|
|
Design |
|
|
|
|
|
End gap (installed): |
Standard |
0.15 ~ 0.35 mm (0.0059 ~ 0.0318 in) |
0.15 ~ 0.35 mm (0.0059 ~ 0.0138 in) |
0.3 ~ 0.9 mm (0.0018 ~ 0.035 in) |
|
|
Limit |
1.0 mm (0.0394 in) |
1.0 mm (0.0394 in) |
1.5 mm (0.0591 in) |
|
Side clearance: |
Standard |
0.03 ~ 0.07 in (0.0012 ~ 0.0028 in) |
0.02 ~ 0.06 in (0.008 ~ 0.0024 in) |
- |
|
|
Limit |
0.15 mm (0.0059 in) |
0.15 mm (0.0059 in) |
- |
Barrel
Taper
Expander|
Crankshaft: |
||
|
Crank journal/bearing oil clearance |
0.004 ~ 0.064 mm (0.0016 ~ 0.0025 in) |
|
|
Main journal run-out (maximum) |
0.040 mm (0.0016 in) |
|
|
Connecting rods: |
||
|
Rod bearing oil clearance |
0.03 ~ 0.09 mm (0.0012 ~ 0.0035 in) |
|
|
Oil pump: |
||
|
Housing-to-outer rotor clearance |
0.09 - 0.15 mm (0.0035 ~ 0.0059 in) |
|
|
Outer rotor-to-inner rotor clearance |
0.03 ~ 0.09 mm (0.0012 - 0.0035 in) |
|
|
Clutch: |
||
|
Friction plate: |
Thickness/q'ty |
3.0mm(0.12in)/8 |
|
|
Minimum thickness |
2.8 mm (0.11 in) |
|
Clutch plate: |
Thickness |
1.6 mm (0.063 in)/7 |
|
|
Warp limit |
0.05 mm (0.0020 in) |
|
Clutch spring: |
Length/q'ty |
41.2 mm (1.622 in)/5 |
|
|
Minimum length |
40.2 mm (1.583 in) |
|
|
Spring rate |
1.22 kg/mm (68.3 lb/in) |
|
Clutch lever free play (at lever pivot point) |
2~ 3 mm (0.08 ~ 0.12 in) |
|
|
Transmission shaft run-out maximum: |
0.08 mm (0.0031 in) |
|
|
Middle gear case lash: |
0.1 ~ 0.2 mm (0.0039 - 0.0079 in) |
|
LUBRICATION CHART
OIL PRESSURE INFORMATION
Relief Valve Opening 5.0 kg/cm2 (71 psi)
Bypath Valve Opening 1.0 kg/cm2 (14 psi)
2. Carburetion
|
Manufacturer |
HITACHI |
|
Model I.D. No. |
5G200 |
|
Main jet |
#120 |
|
Pilot jet |
#40 |
|
Starter jet |
#40 (00.9) |
|
Jet needle |
Y-13 |
|
Fuel level |
3±1 mm (0.118±0.039 in) |
|
Pilot screw |
Preset |
|
Air jet. Main |
#80 |
|
Air jet. Pilot |
#225 |
|
Float valve seat |
02.0 |
|
Engine idle speed |
1,050 r/min |
3. Chassis
|
Wheels and tires: |
2.0 mm (0.079 in) |
|
|
Tire pressure (cold) |
Front |
Rear |
|
Up to 90 kg (198(b) load* |
1.8 kg/cm2 (26 psi) |
2.0 kg/cm2 (28 psi) |
|
90 kg (198 lb) ~ 215 kg (474 lb) load* |
2.0 kg/cm2 (28 psi) |
2.3 kg/cm2 (32 psi) |
|
High speed riding |
2.3 kg/cm2 (32 psi) |
2.5 kg/cm2 (36 psi) |
|
Minimum tire tread depth |
0.8 mm (0.03 in) |
0.8 mm (0.03 in) |
|
Brakes: |
||
|
Recommended fluid |
DOT #3 |
|
|
Pad wear limit |
4.0 mm (0.16 in) |
|
|
Rear brake lining wear limit |
2 mm (0.08 in) |
|
|
Brake disc maximum deflection |
0.15 mm (0.006 in) |
|
|
Brake disc minimum thickness |
4.5 mm (0.18 in) |
|
|
Front brake free play |
1.0 ~ 2.0 mm (0.04 ~ 0.08 in) |
|
|
Rear brake free play |
20 ~ 30 mm (0.8 ~1.2 in) |
|
*Total weight of accessories, etc. excepting motorcycle.
|
Front forks: |
|
|
Travel |
150 mm (5.91 in) |
|
Spring free length |
604.9 mm (23.81 in) |
|
Spring preload length |
582.9 mm (22.95 in) |
|
Spring rate: |
|
|
0~132mm(0~5.20in) |
0.4 kg/mm (22.4 lb/in) |
|
132 ~ 150 mm (5.20 ~ 5.91 in) |
0.5 kg/mm (28.0 lb/in) |
|
Fork oil capacity (each side) |
309 cc (10.5 oz) |
|
Oil type |
Yamaha Fork Oil 20Wt or equivalent |
|
Standard air pressure |
0.4 kg/cm2 (5.7 psi) |
|
Rear shock absorbers: |
|
|
Spring free length |
227.8 mm (8.97 in) |
|
Spring preload length |
207.8 mm (8.18 in) |
|
Spring rate: |
|
|
0~55mm (0~ 2.17 in) |
1.7 kg/mm (95.2 lb/in) |
|
55 ~ 80 mm (2.17~3.15 in) |
2.1 kg/mm (117.6 lb/in) |
|
Travel |
80 mm (3.15 in) |
4. Electrical
Ignition timing retarded: 7° at 1,050 r/min
Ignition timing advance:
|
Spark plug: |
NGK BP7ES or ND W22EP |
|
Electrode gap |
0.7 ~ 0.8 mm |
|
Spark plug cap resistance |
5.0 kΩ (No. 1, No. 4), |
|
Pick up coil: |
|
|
Resistance |
65012 ± 20% at 20°C (68° F) |
|
Ignition coil type: Spark gap |
HITACHI CM 12-09 |
|
Primary resistance |
2.5Ω ± 10%at20°C(68°F) |
|
Secondary resistance |
11 kΩ±20%at20°C(68°F) |
|
Starter motor type: |
ND, ADB4D2 |
|
Armature coil resistance |
0.014Ω ± 6% at 20°C (68°F) |
|
Brush length: Standard |
12.0 mm (0.472 in) |
|
Minimum |
8.5 mm (0.33 in) |
|
Brush spring pressure |
800 ± 150g (28.24 ± 5.30 oz) |
|
Armature mica undercut |
0.6 mm (0.024 in) |
|
Battery type: |
YUASAYB14L-A2 |
|
Charging rate |
1.4 Amps for 10 Hours |
|
Generator type: |
HITACHI LD119-08 |
|
Output |
14V-19A at 5,000 r/min |
|
Field (inner) coil resistance |
4.0Ω±10%at20°C(68°F) |
|
Stator (outer) coil resistance |
0.46Ω ± 10% at 20° C (68° F) |
|
Regulator type: |
I.C. (S8534) |
|
Regulated voltage |
14.5 ± 0.3V |
|
Allowable amperage |
3A |
|
Starter relay switch: |
|
|
Cut-in voltage |
Less than 8V |
|
Headlight |
12V, 60W/55W |
|
Tail/brake light |
12V, 8W (3CP)/27W (32CP) |
|
Flasher light |
12V,27W(32CP)x4 |
|
License light |
12V, 8W(3CP)x2 |
|
Pilot lights: |
|
|
Turn |
12V, 3.4Wx2 |
|
High beam |
12V,3.4Wx 1 |
|
Neutral |
12V, 3.4Wx1 |
|
Warning |
12V,3.4Wx1 |
|
Meter light |
12V. 3.4Wx2 |
|
Auxiliary low beam light |
12V,35Wx1 |
- Printer-friendly version
- Log in to post comments