KEEWAY ATV300, User Manual

Page: 47 / 110

47
7-2 Precautions in Operation
General Information
Both cylinder and piston service cannot be carried out when engine mounted on
frame
Specification Unit
：
mm
Item Standard Limit
Cylinder ID
Bend
Piston/
Piston ring Clearance
between
piston rings Top ring
2
nd
ring
Ring-end gap Top ring
2
nd
ring
Oil ring side rail
OD of piston
Clearance between piston and cylinder
ID of piston pin boss
OD of piston pin
Clearance between piston and piston pin
ID of connecting rod small-end
7-3 Trouble Diagnosis
Low or Unstable Compression Pressure Smoking in Exhaust Pipe
Cylinder or piston ring worn out Piston or piston ring worn out
Piston ring installation improperly
Cylinder or piston damage
Knock or Noise Engine Overheat
Cylinder or piston ring worn out Carbon deposits on cylinder head top side
Carbon deposits on cylinder head Cooling pipe clogged or not enough in
top-side
coolant flow
Piston pin hole and piston pin wear out