Baja WD250U Service Manual page 19

V. Maintenance Specification of Engine
Item
Valve spring:
Outside spring:
Free length: intake/exhaust
Setting length when valve is closed:
Compressing pressure when assembling:intake/exhaust
Limit value of sqaureness:intake/exhaust
Twisting direction of spring (top view):intake/exhaust
Valve, valve seal, valve guide
Valve clearance (it's cold):
Size of valve
A-diameter of valve head
B-width of valve face
C-width of valve set
D-limit thickness
Outside diametes of valve stem
Inside diameter of valve guide:
Clearance between valve stem and guide:
Roundness of valve seem
Piston ring:
First ring
Type
Size (BxT)
Clearance of endface (in assembling)
Clearance of side (in assembling)
Second ring
Type
Size (BxT)
Clearance of endface (in assembling)
Clearnace of side (in assembling)
Oil ring
Size (BxT)
Clearance of endface (in assembling)
Standard
37.2mm
32.0mm
162.8-200.1N
clockwise
intake 0.05-0.09
exhaust 0.11-0.15
exhaust 28.4-28.6mm
intake 33.9-34.1mm
intake/exhaust 1.7-2.8mm
intake/exhaust 0.9-1.1mm
intake/exhuast 0.8-1.2mm
exhaust 5.960-5.975mm
intake 5.975-5.990mm
intake/exhaust 6.000-6.012mm
exhaust 0.025-0.052mm
intake 0.10-0.037mm
Bucket-shaped back round
1.2x2.8mm
0.15-0.30mm
0.03-0.07mm
Flat type
1.2x2.8mm
0.15-0.30mm
0.02-0.06mm
2.5x2.8mm
0.2-0.7mm
19
Limit
2.5˚/1.6mm
1.6mm
0.10mm
0.08mm
0.03mm
0.4mm
0.12mm
0.4mm
0.12mm