SPEC
2-5
Item
Standard
Limit
Transmission
Transmission type
Constant mesh, 6-speed
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Primary reduction system
Spur gear
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Primary reduction ratio
65 / 18 (3.611)
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Secondary reduction system
Chain drive
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Secondary reduction ratio
47 / 14 (3.357) (YZ85 for EUR, CAN)
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48 / 14 (3.428) (YZ85 for AUS, NZL)
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52 / 14 (3.714) (YZ85LW)
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Operation
Left-foot operation
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Gear ratios
1st gear
27 / 11 (2.454)
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2nd gear
32 / 17 (1.882)
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3rd gear
26 / 17 (1.529)
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4th gear
22 / 17 (1.294)
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5th gear
26 / 23 (1.130)
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6th gear
25 / 25 (1.000)
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Max. main axle runout
0.01 mm
(0.004 in)
Max. drive axle runout
0.01 mm
(0.004 in)
Shifting mechanism
Shift mechanism type
Cam drum / Guide bar
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Guide bar bending limit
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0.05 mm
(0.002 in)
Air filter type
Wet element
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Air filter oil glade
Form air filter oil or 2-stroke motor oil
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Carburetors
Model (manufacturer)
PWK28 (KEIHIN)
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Throttle cable free play (at the flange
of the throttle grip)
3.0 ~ 5.0 mm (0.118 ~ 0.197 in)
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ID mark
5PA1 00
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Main jet
#138
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Main air jet
#60
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Jet needle-clip position
NBKF-2
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Needle jet
ø2.6
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Cutaway 3.0
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Pilot jet
#45
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Bypass ø0.8
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Pilot outlet
ø0.4
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Pilot screw turns out
2
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Valve seat size
ø2.6
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Starter jet
#62
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Float height
18 ~ 20 mm (0.71 ~ 0.79 in)
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ENGINE SPECIFICATIONS
