Yamaha yz250f A 2011, Owner'S Service Manual

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2-7
MAINTENANCE SPECIFICATIONS
Clutch:
Friction plate thickness 2.9–3.1 mm (0.114–0.122 in) 2.8 mm (0.110
in)
Quantity 9 ----
Clutch plate thickness 1.1–1.3 mm (0.043–0.051 in) ----
Quantity 8 ----
Warp limit ---- 0.1 mm (0.004
in)
Clutch spring free length 35.7 mm (1.41 in) 34.7 mm (1.37
in)
Quantity 5 ----
Clutch housing thrust clearance 0.050–0.300 mm (0.0020–0.0118 in) ----
Clutch housing radial clearance 0.010–0.044 mm (0.0004–0.0017 in) ----
Clutch release method Inner push, cam push ----
Shifter:
Shifter type Cam drum and guide bar ----
Guide bar bending limit ---- 0.05 mm (0.002
in)
Kickstarter:
Type Kick and ratchet type ----
Carburetor:
USA, CDN
EUROPE, AUS, NZ,
ZA
Type/manufacturer FCR-MX37/KEIHIN
←
----
I. D. mark 17D5 50 17D6 60 ----
Main jet (M.J) #180
←
----
Main air jet (M.A.J) ø2.0 ← ----
Jet needle-clip position (J.N) NDJR-4 NHKR-4 ----
Cutaway (C.A) 1.5
←
----
Pilot jet (P.J) #45 #42 ----
Pilot air jet (P.A.J) #105
←
----
Pilot outlet (P.O) ø0.9
←
----
Pilot screw (example) (P.S) 1-3/4
←
----
Bypass (B.P) ø1.0
←
----
Valve seat size (V.S) ø3.8
←
----
Starter jet (G.S) #72
←
----
Leak jet (Acc.P) #70 #110 ----
Float height (F.H) 8 mm (0.31 in)
←
----
Engine idle speed 1,900–2,100 r/min
←
----
Intake vacuum 29.3–34.7 kPa
(220–260 mmHg,
8.66–9.45 inHg)
←
----
Hot starter lever free play 3–6 mm (0.12–0.24
in)
←
----
Item Standard Limit