Yamaha Grizzly550 User Manual page 35

Spring rate K1 (intake)
Spring rate K2 (intake)
Spring rate K1 (exhaust)
Spring rate K2 (exhaust)
Installed compression spring force (intake)
Installed compression spring force (exhaust)
Spring tilt (intake)
Spring tilt (exhaust)
Winding direction (intake)
Winding direction (exhaust)
Cylinder
Bore
Wear limit
Taper limit
Out of round limit
Piston
Piston-to-cylinder clearance
Limit
Diameter D
Height H
D
Offset
Offset direction
Piston pin bore inside diameter
Limit
Piston pin outside diameter
34.18 N/mm (3.49 kgf, 195.16 lbf)
44.14 N/mm (4.50 kgf, 252.04 lbf)
34.18 N/mm (3.49 kgf, 195.16 lbf)
44.14 N/mm (4.50 kgf, 252.04 lbf)
171.00–197.00 N (17.44–20.09 kgf, 38.44–
44.29 lbf)
171.00–197.00 N (17.44–20.09 kgf, 38.44–
44.29 lbf)
2.5°/1.80 mm
2.5°/1.80 mm
Clockwise
Clockwise
92.000–92.010 mm (3.6220–3.6224 in)
(YFM5FGY/YFM5FGPY)
102.000–102.010 mm (4.0157–4.0161 in)
(YFM7FGY/YFM7FGPY)
92.080 mm (3.6252 in)
(YFM5FGY/YFM5FGPY)
102.080 mm (4.0189 in)
(YFM7FGY/YFM7FGPY)
0.05 mm (0.002 in)
0.05 mm (0.002 in)
0.030–0.055 mm (0.0012–0.0022 in)
0.10 mm (0.0039 in) (YFM5FGY/YFM5FGPY)
0.13 mm (0.0051 in) (YFM7FGY/YFM7FGPY)
91.955–91.970 mm (3.6203–3.6209 in)
(YFM5FGY/YFM5FGPY)
101.955–101.970 mm (4.0140–4.0146 in)
(YFM7FGY/YFM7FGPY)
10.0 mm (0.39 in)
H
0.50 mm (0.0197 in)
Intake side
23.004–23.015 mm (0.9057–0.9061 in)
23.045 mm (0.9073 in)
22.991–23.000 mm (0.9052–0.9055 in)
2-6
ENGINE SPECIFICATIONS
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