Kawasaki WORKHORSE 250 (2003) [71/322] Engine top end 4 7
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Kawasaki WORKHORSE 250 (2003) [71/322] Engine top end 4 7

Kawasaki WORKHORSE 250 (2003) [71/322] Engine top end 4 7
ENGINE TOP END 4-7
Specifications
Item Standard Service Limit
Valve Guide Clearance (wobble method):
Exhaust 0.05 ∼ 0.11 mm 0.27 mm
(0.0020 ∼ 0.0043 in.) (0.0106 in.)
Inlet 0.02 ∼ 0.08 mm 0.23 mm
(0.0008 ∼ 0.0032 in.) (0.0091 in.)
Valve Seat Cutting Angle 45°, 32°, 60° –––
Valve Stem Bend ––– TIR 0.05 mm
Valve Seat Surface:
Width:
Exhaust 0.5 ∼ 1.0 mm (0.02 ∼ 0.04 in.) –––
Inlet
0.5 ∼ 1.0 mm (0.02 ∼ 0.04 in.)
–––
Outside Diameter:
Exhaust 26.9 ∼ 27.1 mm (1.059 ∼ 1.067 in.) –––
Inlet 30.9 ∼ 31.1 mm (1.217 ∼ 1.224 in.) –––
Valve spring free length:
Inner 37.8 mm (1.488 in.) 36.2 mm (1.425 in.)
Outer 40.4 mm (1.591 in.) 38.7 mm (1.524 in.)
Cylinder, Piston
Cylinder Inside Diameter 68.995 ∼ 69.007 mm 69.10 mm
(2.7163 ∼ 2.7168 in.) (2.720 in.)
Piston Diameter 68.960 ∼ 68.975 mm 68.81 mm
(2.7150 ∼ 2.7155 in.) (2.709 in.)
Piston/Cylinder Clearance
0.020 ∼ 0.047 mm (0.0008 ∼ 0.0019
in.)
–––
Piston Ring/Groove Clearance:
Top 0.02 ∼ 0.06 mm 0.16 mm
(0.0008 ∼ 0.0024 in.) (0.0063 in.)
Second 0.02 ∼ 0.06 mm 0.16 mm
(0.0008 ∼ 0.0024 in.) (0.0063 in.)
Piston Ring Groove Width:
Top 0.81 ∼ 0.83 mm 0.91 mm
(0.0319 ∼ 0.0327 in.) (0.0358 in.)
Second 1.21 ∼ 1.23 mm 1.31 mm
(0.0476 ∼ 0.0484 in.) (0.0516 in.)
Oil
2.51 ∼ 2.53 mm 2.61 mm
(0.0988 ∼ 0.0996 in.) (0.1028 in.)
Piston Ring Thickness:
Top 0.77 ∼ 0.79 mm 0.70 mm
(0.0303 ∼ 0.0311 in.) (0.028 in.)
Second 1.17 ∼ 1.19 mm 1.10 mm
(0.0461 ∼ 0.0469 in.) (0.043 in.)

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