Yamaha WR250F(N) Owner's Service Manual page 81

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:
Type/manufacturer
I. D. mark
Main jet
Main air jet
Jet needle
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
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
2.9 ~ 3.1 mm
(0.114 ~ 0.122 in)
9
1.1 ~ 1.3 mm (0.043 ~ 0.051 in)
8
----
39.1 mm (1.54 in)
5
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
----
Kick and ratchet type
USA
FCR-MX37/
KEIHIN
5PH1 00 5PH2 10
#170
#200
OBELP-3 OBEGP-4
1.5
#42
#75
ø0.9
1-3/4
ø1.0
ø3.8
#72
#60 #105
8 mm (0.31 in)
1,700 ~
1,900 r/min
26.7 ~ 32.0 kPa
(200 ~ 240 mmHg,
7.87 ~ 9.45 inHg)
2 - 8
SPEC
Limit
2.7 mm
(0.106 in)
----
----
----
0.1 mm
(0.004 in)
38.1 mm
(1.50 in)
----
----
----
----
----
0.05 mm
(0.002 in)
----
CDN, ZA,
EUROPE
AUS, NZ
5PH4 20
OBEHP-4