Universal M-25XP User Manual

ENGINE BODY
Cylinder Head
Item
Cylinder head surface
flatness
Top clearance
Free
Gasket thickness
Tightened
Gasket shim thickness
Compression pressure
Variance among
cylinders
Valves (IN., EX.)
Valve clearance (cold)
Valve
seat width
Valve seat angle
Valve
face angle
Valve
recessing
Clearance between valve
stem and guide
Valve stem 0.0.
Valve guide 1.0.
Valve Timing
Inlet valve
Open
Close
Open
Exhaust valve
Close
Valve Spriings
Free length
Tilt
Tension
ENGINE SPECIFICATIONS
Model 18
0.5 mm
(0.002 in.)
0.6 to 0.8 mm
(0.0236 to
0.0315 in.)
1.15 to 1.30 mm
(0.0453 to
0.0512 in.)
1.05 to 1.15 mm
(0.0413 to 0.0453 in.)
0.2 mm
(0.0079 in.)
3.00 MPa
(29.5 kgf/cm
2
,
427 pSi)
-
0.145 to 0.185 mm
(0.006 to
0.007 in.)
2.1 mm
(0.083 in.)
0.785 rad.
(45.0°)
0.785 rad.
(45.0°)
0.9 to 1.1 mm
(0.035 to 0.043 in.)
0.035 to 0.065 mm
(0.0014 to 0.0026 in)
6.960 to
6.975 mm
(0.274 to 0.2746 in.)
7.010 to 7.025 mm
(0.2759 to 0.2765 in.)
0.35 rad. (20°)
before TOC
0.79 rad. (45°)
after TOC
0.87 rad. (50°)
before TOC
0.26 rad. (15°)
after TOC
35.1 mm to 35.6 mm
(1.382 to 1.402 in.)
1.3 mm
(0.051 in.)
74. N/31 mm
(7.5 kQf/31mm, 16.5 Ibs.l1.22 in.
20
Model 25
0.05 mm
(0.0020 in.)
0.6 to 0.8 mm
(0.0236 to
0.0315 in.)
1.15 to 1.30 mm
(0.0453 to
0.0512 in.
1.05 to 1.15 mm
(0.0413 to 0.0453 in.)
0.2 mm
(0.0079 in)
3.00 MPa
(29.5 kaf/cm
2
,
427 psi)
-
0.145 to 0.185 mm
(0.006 to
0.007 in.)
2.1 mm
(0.083 in.)
0.785 rad.
(45.0°)
0.785 rad.
(45.0°)
0.9 to 1.1 mm
(0.035 to 0.043 in.)
0.035 to 0.065 mm
(0.0014 to 0.0026 in.)
9.960 to
6.975 mm
(0.274 to 0.2746 in.)
7.010 to 7.025 mm
(0.2759 to 0.2765 in.)
0.35 rad. (20°)
before TOe
0.79 rad. (45°)
after TOC
0.87 rad. (50°)
before TOC
0.26 rad. (15°)
after TDC
35.1 mm to 35.6 mm
(1.382 to 1.402 in.)
1.3 mm
(0.051 in.)
74 N/31 mm
(7.5 kaf/31 mm, 16.5 Ibs.l1.22 in.)

Universal M-25XP Specifications

General

Brand	Universal
Model	M-25XP
Category	Engine
Language	English