Yamaha WR450F, Owner'S Service Manual

Page: 97 / 794

SPEC
2 - 8
Clutch:
Friction plate thickness 2.92 ~ 3.08 mm
(0.115 ~ 0.121 in) 2.8 mm
(0.110 in)
Quantity 8 ----
Clutch plate 1 thickness 1.9 ~ 2.1 mm (0.075 ~ 0.083 in) ----
Quantity 4 ----
Warp limit ---- 0.1 mm
(0.004 in)
Clutch plate 2 thickness 1.5 ~ 1.7 mm (0.059 ~ 0.067 in) ----
Quantity 3 ----
Warp limit ---- 0.1 mm
(0.004 in)
Clutch spring free length 50.0 mm (1.97 in) 49.0 mm
(1.93 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)
Kickstarter:
Type Ratchet type ----
Carburetor:
I. D. mark 5TJE E0 ----
Main jet (M.J) #162 ----
Main air jet (M.A.J) ø2.0 ----
Jet needle (J.N) NFNT ----
Cutaway (C.A) 1.5 ----
Pilot jet (P.J) #45 ----
Pilot air jet (P.A.J) #70 ----
Pilot outlet (P.O) ø0.9 ----
Bypass (B.P) ø1.0 ----
Valve seat size (V.S) ø3.8 ----
Starter jet (G.S) #65 ----
Leak jet (Acc.P) #60 ----
Float height (F.H) 8 mm (0.31 in) ----
Engine idle speed 1,750 ~ 1,850 r/min ----
Intake vacuum 34.8 ~ 40.1 kPa
(261 ~ 301 mmHg,
10.28 ~ 11.85 inHg) ----
Hot starter lever free play 3 ~ 6 mm (0.12 ~ 0.24 in) ----
Item Standard Limit
MAINTENANCE SPECIFICATIONS