Yamaha WR450F(S) Owner's Service Manual page 83

Clutch:
Friction plate thickness
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
Kickstarter:
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
Leak jet
Float height
Engine idle speed
Intake vacuum
Hot starter lever free play
MAINTENANCE SPECIFICATIONS
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)
(Acc.P)
(F.H)
Standard
2.92 ~ 3.08 mm
(0.115 ~ 0.121 in)
9
1.1 ~ 1.3 mm (0.043 ~ 0.051 in)
8
----
48.4 mm (1.91 in)
6
0.10 ~ 0.35 mm
(0.0039 ~ 0.0138 in)
0.010 ~ 0.044 mm
(0.0004 ~ 0.0017 in)
Inner push, cam push
Cam drum and guide bar
----
Ratchet type
USA
5TJ5 50
#165
ø2.0
OBDWR-4
1.5
#45
#70
ø0.9
1-3/4
ø1.0
ø3.8
#65
#60
8 mm (0.31 in)
1,700 ~
1,900 r/min
33.3 ~ 38.7 kPa
(250 ~ 290 mmHg,
9.84 ~ 11.42 inHg)
3 ~ 6 mm
(0.12 ~ 0.24 in)
2 - 8
SPEC
2.8 mm
(0.110 in)
----
----
----
0.1 mm
(0.004 in)
47.4 mm
(1.87 in)
----
----
----
----
----
0.05 mm
(0.002 in)
----
EUROPE,
CDN, AUS, NZ,
ZA
5TJ2 10 ----
#160 ----
←
----
OBDUQ-4 ----
←
----
#48 ----
#80 ----
←
----
1-1/2 ----
←
----
←
----
←
----
#50 ----
←
----
←
----
←
----
←
----
Limit