16
Diagnosing and eliminating of malfunction:
●
Emission of black smoke for abrasion of cylinder or piston,
1.
Cylinder, piston of piston ring is worn out.
2. The piston ring is not properly assembled.
3. The piston or cylinder wall is scraped.
●
overheated
1
Excessive incrustation of piston.
2 Blast and abnormal noise.
3 Abrasion of cylinder or piston.
Inspection of cylinder.
item
mm
standard value: mm
mm
limit value:mm
cylinder
Inner diameter of
cylinder
φ
84.503
～φ
84.527
φ
84.6
taper
0.0040
0.005
out of roundness
0.0035
0.005
degree of warp
0.04
0.10
Piston,
piston ring
and piston
pin
Outside diameter of piston
φ84.47～φ84.45
φ84.35～φ84.25
Inner diameter of piston pin
hole
φ20.002～φ20.01
φ20.05～φ20.1
gap between piston pin and
piston pin hole
0.002
～
0.019
0.03
Piston
ring
end
clearance
Top ring/the
second ring
0.2
～
0.4
0.5
～
0.7
gap between
piston
ring
and
piston
groove
oil ring
0.03
～
0.15
0.3
～
0.5
top ring
0.03
～
0.07
0.10
～
0.15
second ring
0.02
～
0.06
0.09
～
0.14
gap between cylinder and
piston
0.033
～
0.062
0.07
～
0.10
outside diameter of piston
pin
φ19.991～φ20
φ19.95～φ19.97
Crank shaft
Inner diameter
φ 20.016 ～ φ
20.027
φ20.05
Gap between small end of
connecting rod and piston
pin
φ0.018～φ0.036
0.05
Summary of Contents for 500 Bearclaw
Page 1: ...1 500BEARCLAWATV Maintenance Manual...
Page 5: ...5 General Information 1 Description...
Page 6: ...6...
Page 40: ...40 3 9 carburetor 3 9 1 Structure of carburetor...
Page 94: ...94...
