Motive Power Industry BLUR 150, Service Manual

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Piston & Cylinder inspection (220CC)
Part name /description Standard value
( mm )
Limit of use
( mm )
Bore
67.485~67.505 67.595
Curve - 0.005
Cylindrility - 0.005
Cylinder
Roundness
- 0.005
lst ring 0.04~0.08 0.15
Clearance b/w Piston and
Piston ring
2
nd
ring 0.02~0.06 0.15
lst ring 0.10~0.25 0.50
2
nd
ring 0.30~0.45 1.0
Clearance of cutting
section
side ring 0.2~0.7 ---
Piston outer diameter 67.460~67.480 67.390
Measuring location of piston outer dia.
Down to 8 mm from the piston
skirt
---
Clearance b/w piston and cylinder 0.025~0.035 0.10
Piston/
Piston ring
Piston pin hole inner dia 16.004~16.010 16.040
Piston pin outer diameter
15.992~15.990 15.98
Clearance between piston and piston pin
0.020~0.017 0.025
Connecting rod small end inner dia
16.010~16.016 16.060
Crankshaft
Item Standard value(mm) Limit of use.(mm)
Clearance of connecting rod big end
axle direction
0.005~0.013 0.05
Clearance of connecting rod big end
vertical direction.
0.10~0.40 0.8
Swingness of the crank shaft journal. 0.03 0.10
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