Maintenance Specifications -- Engine 750X

Submitted by xjcdadmin on Fri, 05/29/2009 - 15:32
Model(s)
750XS (MaximX)
750XN (MaximX)

 

Model

XJ750XN

Cylinder Head: Warp Limit

0.03 mm (0.0012 in)

*Lines indicate straightedge measurement.

Cylinder: 

Bore Size 

Taper Limit 

Out-of Round Limit

 

68.000 ~ 68.005 mm (2.6772 ~~ 2.6774 in) 

0.05 mm (0.002 in) 

0.05 mm (0.002 in)

Camshaft: 

Drive Method

Cam Cap Inside Diameter

Camshaft Outside Diameter Shaft to Cap Clearance

 

Chain drive (Center)

24.5+0.021-0 mm (0.9646+0.008-0 in)

24.5-0.050-63 mm (0.9646-0.0020-0.0025 in) 

0.050 - 0.084 mm (0.0020 - 0.0033 in)

Cam Dimensions:

Intake "A"

<Limit> 

"B"

<Limit> 

"C"

32.55-32.65 mm (1.2815- 1.2854 in)

32.45 mm (1.2776 in)

24.95 ~ 25.05 mm (0.9823 - 0.9862 in)

24.85 mm (0.9783 in)

7.5 - 7.7 mm (0.2953 ~ 0.3031 in)

Exhaust "A"

<Limit> 

"B"

<Limit> 

"C"

32.40 ~ 32.50 mm (1.2756 - 1.2795 in)

32.30 mm (1.2717 in)

24.95 - 25.05 mm (0.9823 - 0.9862 in)

24.85 mm (0.9783 in)

7.35 - 7.55 mm (0.2894 - 0.2972 in)

 

 

Model

XJ750XN

Camshaft Runout Limit

Cam Chain Type/Number of Links

Cam Chain Adjustment Method

0.03 mm (0.0012 in) 

Bush chain/112 

Automatic

 Valve Clearance (Cold) 

IN.

EX.

 

0.11 - 0.20 mm (0.004 - 0.008 in) 

0.21 - 0.30 mm (0.008 - 0.012 in)

Valve Dimensions

"A" Head Dia. 
IN.
EX. 

"B" Face Width 
IN.
EX. 

"C" Seat Width 
IN.
EX. 

"D" Margin Thickness 
IN.
EX.


21 ± 0.1 mm (0.827 ± 0.004 in) 
23 ± 0.1 mm (0.906 ± 0.004 in) 


1.98- 2.55 mm (0.080- 0.100 in) 
1.98- 2.55 mm (0.080- 0.100 in) 


1.0 ± 0.1 mm (0.040 ± 0.004 in) 
1.0 ± 0.1 mm (0.040 ± 0.004 in) 


0.7+0.1 mm (0.028 ± 0.004 in) 
0.7 ± 0.1 mm (0.028 ± 0.004 in)

Stem Outside Diameter 
IN
EX.

<Limit>
IN. 
EX.

5-0.010-25 mm (0.1969-0.0004-0.0010 in) 
5-0.025-40 mm (0.1969-0.0010-0.0016 in) 

4.945 mm (0.1947 in) 
4.930 mm (0.1941 in)

Guide Inside Diameter 
IN.
EX.

<Limit> 
IN. 
EX.


5+0.012-0 mm (0.1969+0.0005-0 in) 
5+0.012-0 mm (0.1969+0.0005-0 in) 

5.05 mm (0.199 in) 
5.05 mm (0.199 in)

Stem-to Guide Clearance 
IN.
EX.

<Limit> 
IN.
EX.

 

0.010-0.037 mm (0.0004 - 0.0015 in) 
0.025 - 0.052 mm (0.0010 - 0.0020 in)

0.08 mm (0.003 in) 
0.10 mm (0.004 in)

Stem-Runout Limit

0.01 mm (0.0004 in)

Valve Spring: 

Free Length 
IN.
EX. 

Installed Length (Valve Closes)
IN.
EX.

 


39.76 mm (1.565 in) 
39.96 mm (1.573 in) 


35.0 mm (1.378 in) 
35.0 mm (1.378 in)

 

Model

XJ750N

Tilt Limit 

 

Inner Spring IN. & EX. 

Outer Spring IN. & EX.

2.5° or 1.7 mm (0.067 in)

2.5° or 1.7 mm (0.067 in)

 

 

Direction of Winding 
IN.
EX.


Right 
Right

Piston:

 Piston Size "D"/
 Measuring Point "H"

68.00-0.012-0.075 mm (2.672-0.0024-0.0030 in) 

5 mm (0.20 in) (From bottom line of piston skirt)

Clearance Between Piston & Cylinder

<Limit>

Oversize: 
2nd
4th

0.06 - 0.08 mm (0.0024 - 0.0031 in) 

0.1 mm (0.004 in) 

68.50 mm (2.697 in) 
69.00 mm (2.717 in)

Piston Ring:

 

Sectional Sketch

Top Ring 

 

2nd Ring 

 

Oil Ring

 

 

Barrel
B = 1.0 mm (0.039 in)
T = 2.6mm (0.102 in)

Taper
B = 1.2 mm (0.042 in)
T = 2.7 mm (0.106 in)

Expander
B = 2.0 mm (0.079 in)
T- 2.5 mm (0.098 in)

 

End Gap (Installed): 

Top Ring
<Limit> 

2nd Ring 
<Limit> 

Oil Ring 
<Limit>

 

0.30 ~ 0.45 mm (0.012 ~ 0.018 in)
1.0 mm (0.040 in)

0.20 - 0.35 mm (0.008 - 0.014 in)
1.0 mm (0.040 in)

0.20 - 0.7 mm (0.008 - 0.028 in)
1.5 mm (0.060 in)

Side Clearance: 

Top Ring
<Limit> 

2nd Ring 
<Limit>

 

0.03 - 0.07 mm (0.0012 - 0.0028 in) 
0.15 mm (0.006 in) 

0.03 ~~ 0.07 mm (0.0012 - 0.0028 in)
 0.15 mm (0.006 in)

 

Model

XJ750XN

Connecting Rod: Oil Clearance

0.032 - 0.056 mm (0.0013 - 0.0022 in)

Crankshaft:

 

Crank Width "A" 

Runout Limit "B" 

Big End Side Clearance "C" 

Journal Clearance

341.4 ± 0.6 mm (13.441 ± 0.024 in) 

0.03 mm (0.0012 in) 

0.160 ~ 0.262 mm (0.0063 - 0.0103 in)

 0.020 ~ 0.044 mm (0.0008- 0.0017 in)

Bearing: 

Color Code (Corresponding Size)

1. Blue 1.5 +0.006+0.002 mm (0.0591+0.00024+0.00007 in) 

2. Black 1.5 +0.002-0.002 mm (0.0591+0.00007-0.00007 in) 

3.  Brown 1.5 -0.002-0.006 mm (0.0591-0.00007-0.00024 in)

4. Green 1.5 -0.006-0.010 mm (0.0591-0.00024-0.00039 in)

5.  Yellow 1.5 -0.010-0.014 mm (0.0591-0.00039-0.00056 in)

Clutch: 

Friction Plate Thickness x Quantity
Wear Limit

Clutch Plate Thickness x Quantity Warp Limit

Clutch Spring Free Length x Quantity 
Clutch Spring Minimum Length

 Clutch Release Method

 

3.0 mm (0.12 in) x 8 
2.8 mm (0.11 in) 

2.0 mm (0.079 in) x 7 
0.05 mm (0.0020 in) 

50.5 mm (2.031 in) x6 
49.0 mm (1.93 in) 

Outer Pull

Transmission: 

Main Axle Deflection Limit 

Drive Axle Deflection Limit

 

0.08 mm (0.0031 in) 

0.08 mm (0.0031 in)

Shifter: 

Shifter Type 

Guide Bar Bending Limit

 

Guide bar

0.1 mm (0.004 in)

Carburetor:

 Type/Manufacturer/Quantity 

I.D. Mark

Main Jet (MJ.) 

Main Air Jet (M.AJ.) 

Jet Needle-clip Position (J.N.) 

Needle Jet (N.J.) 

Throttle Valve (Th.V) 

Pilot Jet (P.J.) 

Pilot Outlet Size (P.O.) 

Pilot Air Jet (P.A.J.)

Pilot Screw (P.S.) 

Valve Seat Size (V.S.) 

Starter Jet (G.S.) 

Bypath Size (B.P.)

Fuel Level (F.L)

Float Height (F.H.) 

Engine Idling Speed 

Vacuum Pressure at Idling Speed 

Vacuum Synchronous Difference

 

 

BS33/MIKUNI/4

1FL00

#105

#120

5FZ83

Y-2

#130

#37.5

00.8

#140

2-1/2 ± 1/2

02.3

*35

00.9

3.0 ± 1.0 mm (0.12 ± 0.04 in) 
below from the carburetor mixing chamber body edge.

17.5 ± 1.0 mm (0.69 ± 0.04 in)

1,050± 50r/min

24 ± 1.3 kPa (180± 5 mmHg, 7.1 ± 0.2 inHg)

Below 0.7 kPa (5 mmHg, 0.2 inHg)

 

 

 

 

XJ750XN

    

Lubrication System: 

Oil Filter Type 

Oil Pump Type 

Tip Clearance 

Side Clearance

Bypass Valve Setting 

Pressure Relief Valve Operating Pressure

 

Paper

Trochoid pump

0.03 ~ 0.09 mm (0.0012 - 0.0035 in)

0.03 ~ 0.08 mm (0.0012 ~ 0.0031 in)

98.0 ± 20kPa (1.0+ 0.2 kg/cm2, 14.2 ± 2.8 psi)

490±49kPa(5.0± 0.5 kg/cm2, 71 ± 7.1 psi)

Lubrication Chart

 

Cooling System: 

Radiator Core Size 
Width
Height 
Thickness 

Radiator Cap Opening Pressure

 

300 mm (11.8 in)
185 mm (7.28 in)
32 mm (1.26 in)

78 - 98 kPa (0.8 - 1.0 kg/cm2, 11.4- 14.2 psi)

Coolant: 

Total Amount

 Reservoir Tank Capacity 

<From Low to FULL Level>

 

24.0L (2.11 lmp. qt, 2.54US qt) 

0.49 L (0.43 Imp qt, 0.52 US qt) 

0.14 L (0.12 Imp. qt, 0.15 US qt)

Water Pump: Type

Single Suction Centrifugal Pump

Thermostat: 

Opening Temperature 

Full Open Temperature/Lift

 

82°C(180°F)

95°C (203°F)/8mm (0.31 in)

Shaft Drive: Middle Gear Backlash: Final Gear Backlash:

0.1 ~ 0.2 mm (0.004 - 0.008 in) 0.1 ~ 0.2 mm (0.004 - 0.008 in)

 

 

 

XJ700XN/XNC

Headlight Type:

Semi-sealed beam (Quartz bulb)

Bulb Wattage x Quantity: 

Headlight 
Tail/Brake Light 
Flasher Light

 

12V, 60W/55W
12V,8W/27Wx2
12V,27Wx4

Indicator Light:

Wattage x Quantity: 
Meter Light
"NEUTRAL"
"HIGH BEAM" 
"TURN" 
"OIL LEVEL" 
"FUEL"

 


12V,3Wx4 
12V, 3Wx 1 
12V, 3Wx1 
12V, 3Wx2 
12V,3Wx1 
12V,3Wx1