Yamaha YZ450FA 2011, Owner'S Service Manual

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2-7
MAINTENANCE SPECIFICATIONS
Tilt limit* (IN) ---- 2.5°/1.8 mm
(2.5°/0.071
in)
Tilt limit* (EX) ---- 2.5°/1.6 mm
(2.5°/0.063
in)
Direction of winding (top view) (IN) Clockwise ----
Direction of winding (top view) (EX) Clockwise ----
Piston:
Piston to cylinder clearance 0.020–0.045 mm (0.0008–0.0018
in) 0.1 mm
(0.004 in)
Piston size "D" 96.965–96.980 mm
(3.8175–3.8181 in) ----
Measuring point "H" 9.0 mm (0.354 in) ----
Piston off-set Zero mm (Zero in) ----
Piston pin bore inside diameter 18.004–18.015 mm
(0.7088–0.7093 in) 18.045 mm
(0.7104 in)
Piston pin outside diameter 17.991–18.000 mm
(0.7083–0.7087 in) 17.971 mm
(0.7075 in)
Piston rings:
Top ring:
Type Barrel ----
Dimensions (B × T) 1.00 × 3.30 mm (0.04 × 0.13 in) ----
End gap (installed) 0.20–0.30 mm (0.008–0.012 in) 0.55 mm
(0.022 in)
Side clearance (installed) 0.015–0.065 mm (0.0006–0.0026
in) 0.120 mm
(0.0047 in)
Item Standard Limit