Service manual

【6-14】
E
NGINE
CYLINDER/PISTON
SERVICE INFORMATION
GENERAL INSTRUCTIONS
The cylinder and piston can be serviced with the engine
installed in the frame. After disassembly, clean the removed
parts and dry them with compressed air before inspection.
SPECIFICATIONS
Standard (mm) Service Limit (mm)
I.D.
ψ72.70 – 72.715 ψ72.8
Warpage --- 0.050
Cylindricity --- 0.012
Cylinder
True roundness --- 0.012
Top 0.02 0.09 Ring-to-groove
clearance
Second 0.015 – 0.050 0.09
Top 0.10 – 0.25 0.50
Second 0.15 – 0.30 0.50
Ring end gap
Oil ring 0.25 – 0.7 ---
Piston O.D.
ψ72.67 – 72.66 ψ72.60
Piston O.D. measuring position 10.0 ---
Piston-to-cylinder clearance 0.030 – 0.055 0.10
Piston,
piston ring
Piston pin hold I.D.
ψ17.002 – 17.008 ψ17.04
Piston pin O.D.
ψ16.995 – 16.990 ψ17.960
Piston-to-piston pin clearance 0.007 – 0.018 0.025
Connecting rod small end I.D. bore
ψ17.010 – 17.028 ψ17.05