Yamaha ttr230 Service Manual page 23

Model
Piston:
Piston diameter "D"
Measuring point "H"
Piston offset
Piston offset position
Cylinder – piston clearance
<Clearance limit>
Piston rings:
Type:
Top ring
Secondary ring
Dimensions (BXT)
Compression ring
Scraper ring
Oil ring
Inter-tip gap (installed):
Compression ring
Scraper ring
Oil ring
Side clearance (installed):
Top ring
Secondary ring
Crankshaft:
Width "A"
<Misalignment threshold "C">
Connecting rod lower clearance "D"
<Upper clearance limit "F">
Balancer:
Balancing method
Transmission:
<Main shaft warping limit>
<Secondary shaft warping limit>
Shifting fork:
Type
MAINTENANCE SPECIFICATIONS
2-6
TTR230T
69.925~69.975 mm
4.0 mm
0.5 mm
Intake side
0.035~0.055 mm
<0.15 mm>
Round
Flat
B = 1.2 mm
T = 2.8 mm
B = 1.2 mm
T = 2.8 mm
B = 2.5 mm
T = 2.8 mm
0.15~0.30 mm
0.15~0.30 mm
0.30~0.90 mm
0.03~0.07 mm
0.02~0.06 mm
55.95~56.00 mm
<0.03 mm>
0.35~0.65 mm
<0.8 mm>
Gear
<0.08 mm>
<0.08 mm>
Shifting fork and guide bar
SPEC