Yamaha VK10W, Supplementary Service Manual

Page: 122 / 208

54
SPEC
MAINTENANCE SPECIFICATIONS
Carburetor:
Type/Quantity CVK40/3
Manufacturer KEIHIN
I.D. mark 8ES1 02
Main jet (M.J) #148
Main air jet (M.A.J) #70
Jet needle (J.N) N425-BSJ00
Needle jet (N.J) W9554-26538#6
Pilot jet (P.J) #45
Pilot air jet (P.A.J) #120
Pilot outlet (P.O) 0.9
Bypass 1 (B.P.1) 0.8
(B.P.2) 0.8
(B.P.3) 0.8
(B.P.4) 0.8
(B.P.5) 0.8
Throttle valve (Th.V) 1020-B70-80 (
θ
= 10°)
Valve seat size (V.S) 1.2
Starter jet (G.S) #70
Float height (F.H) 16 mm (0.630 in)
Fuel level (below the line on the float cham-
ber) 0.2 ~ 2.2 mm (0.008 ~ 0.087 in)
Throttle cable free play 2.0 ~ 3.0 mm (0.08 ~ 0.12 in)
Engine idle speed 1,300 ~ 1,500 r/min
Fuel pump:
Type Diaphragm
Manufacturer 8FA (MIKUNI)
Oil filter:
Oil filter type Cartridge (paper)
Bypass valve opening pressure 78 ~ 118 kPa (0.78 ~ 1.18 kg/cm
2
, 11.1 ~ 16.8 psi)
Oil pump:
Oil pump type Trochoidal
Inner-rotor-to-outer-rotor-tip clearance 0.09 ~ 0.15 mm (0.004 ~ 0.006 in)
Outer-rotor-to-oil-pump-housing clearance 0.03 ~ 0.08 mm (0.001 ~ 0.003 in)
Relief valve operating pressure 440 ~ 560 kPa (4.4 ~ 5.6 kg/cm
2
, 62.6 ~ 79.6 psi)
Oil pressure (hot) 45 kPa (0.45 kg/cm
2
, 6.40 psi) at 1,400 r/min
Cooling system:
Filler cap opening pressure 93.3 ~ 122.7 kPa (0.93 ~ 1.23 kg/cm
2
, 13.2 ~ 17.5 psi)
Thermostat opening temperature 80 ~ 84 °C (176 ~ 183 °F)
Valve lift 7.0 mm (0.28 in) at 95 °C (203 °F)
Water pump type Single-suction centrifugal pump (Impeller type)
Reduction ratio 22/28 (0.786)
Coolant type High quality silicate-free ethylene glycol antifreeze contain-
ing corrosion inhibitors
Coolant mixing ratio (coolant: water) 3 : 2 (60% : 40%)
Capacity 4.7 L (4.14 Imp qt, 4.97 US qt)
Max. impeller shaft tilt 0.15 mm (0.0059 in)
<Limit> 0.072 mm (0.0028 in)
Model VK10W