Yamaha YZ450F(V), Owner'S Service Manual

Page: 79 / 650

SPEC
2 - 8
Clutch:
Friction plate thickness 2.92 ~ 3.08 mm
(0.115 ~ 0.121 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 47.8 mm (1.88 in) 46.8 mm
(1.84 in)
Quantity 6 ----
Clutch housing thrust clearance 0.10 ~ 0.35 mm
(0.0039 ~ 0.0138 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)
Kick starter:
Type Ratchet type ----
Carburetor:
I.D. mark 2S21 00 ----
Main jet (M.J) #165 ----
Main air jet (M.A.J) ø2.0 ----
Jet needle - clip position (J.N) NFPR-4 ----
Cutaway (C.A) 1.5 ----
Pilot jet (P.J) #42 ----
Pilot air jet (P.A.J) #100 ----
Pilot outlet (P.O) ø0.9 ----
Pilot screw (example) (P.S) 2-1/8 ----
Bypass (B.P) ø1.0 ----
Valve seat size (V.S) ø3.8 ----
Starter jet (G.S) #72 ----
Leak jet (Acc. P) #55 ----
Float height (F.H) 8 mm (0.31 in) ----
Engine idle speed 1,900 ~ 2,100 r/min ----
Intake vacuum 28.0 ~ 33.3 kPa
(210 ~ 250 mmHg,
8.27 ~ 9.84 inHg) ----
Hot starter lever free play 3 ~ 6 mm (0.12 ~ 0.24 in) ----
Item Standard Limit
MAINTENANCE SPECIFICATIONS