Yamaha WR426F(P) Owner's Service Manual page 100

MAINTENANCE SPECIFICATIONS (WR400F)
Clutch:
Friction plate 1 thickness
Inner diameter
Quantity
Friction plate 2 thickness
Inner diameter
Quantity
Clutch plate thickness
Quantity
Warp limit
Clutch spring free length
Quantity
Clutch housing thrust clearance
Clutch housing radial clearance
Clutch release method
Shifter:
Shifter type
Guide bar bending limit
Kick starter:
Type
Carburetor:
I. D. mark
Main jet
Main air jet
Jet needle-clip position
Cutaway
Pilot jet
Pilot air jet
Pilot outlet
Pilot screw (example)
Bypass
Valve seat size
Starter jet
Float height
Engine idle speed
Intake vacuum
Item
(M.J)
(M.A.J)
(J.N)
(C.A)
(P.J)
(P.A.J)
(P.O)
(P.S)
(B.P)
(V.S)
(G.S)
(F.H)
Standard
2.72 ~ 2.88 mm
(0.107 ~ 0.113 in)
ø112 mm (4.41 in)
7
2.92 ~ 3.08 mm
(0.115 ~ 0.121 in)
ø116 mm (4.57 in)
1
1.1 ~ 1.3 mm (0.043 ~ 0.051 in)
7
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44 mm (1.73 in)
5
0.20 ~ 0.45 mm
(0.0079 ~ 0.0177 in)
0.010 ~ 0.044 mm
(0.0004 ~ 0.0017 in)
Inner push, cam push
Cam drum and guide bar
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Ratchet type
5GS6 61
#165
#200
OBDRQ-4
1.5
#42
#75
ø0.9
1-1/2
ø1.0
ø3.8
#65
8 mm (0.31 in)
1,700 ~ 1,900 r/min
33.3 ~ 38.7 kPa
(250 ~ 290 mmHg, 9.84 ~ 11.42 inHg)
2 - 25
SPEC
Limit
2.52 mm
(0.099 in)
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2.72 mm
(0.107 in)
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0.1 mm
(0.004 in)
43 mm
(1.69 in)
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0.05 mm
(0.002 in)
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