Yamaha 2003 TZR50, Service Manual

Page: 95 / 251

ENG
INSPECTION AND REPAIR
4-16
CYLINDER
1. Eliminate:
• Any carbon deposits
Use a rounded scrap
2. Inspect:
• The cylinder
Mineral deposited / rust Remove
• Wall of the cylinder
Wear / scratches grind or replace
3. Measure:
• Diameter of the cylinder “C”
Outside specifications Grind
Use internal gauge
C = D maximun
T = (D
1
or D
2
maximum) - (D
5
or D
6
minimum)
R = (D
1
D
3
or D
5
maxim) - (D
2
D
4
or D
6
minimum)
4. Measure:
• Outside piston diameter “P”
• Outside specifications
Replace
Use the micrometer
NOTE:
The measurement should be taken 5 mm from
the lower edge of the piston
Size
Standard 40.25 mm
Oversize 1 40.6 mm
Oversize 2 40.8 mm
Diameter of
cylinder “C”
Diameter of
cylinder “T”
Ovalling“R”
Standard
40.293 ~
40.312
––
––
Wear
limit
40.4 mm
0.05 mm
0.01 mm
Micrometer:
90896 - 03008