Yamaha RS90RK, Service Manual

Page: 739 / 841

9-8
SPEC
MAINTENANCE SPECIFICATIONS
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
Pilot screw (P.S) 2 turns out
Throttle valve (Th.V) 1020-B70-B0 (
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 95 ~ 125 kPa (0.95 ~ 1.25 kg/cm
2
13.5 ~ 17.8 psi)
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 4.8 L (4.22 Imp qt, 5.07 US qt) (RS90/RS90R/RSG90)
6.3 L (5.55 Imp qt, 6.66 US qt) (RS90M)
5.2 L (4.58 Imp qt, 5.50 US qt) (RST90 “USA/Canada”/
RST90TF “Canada”)
5.4 L (4.75 Imp qt, 5.71 US qt) (RST90 “Europe”/RST90TF
“Europe”)
Max. impeller shaft tilt 0.15 mm (0.0059 in)
<Limit> 0.072 mm (0.0028 in)
Model RS90/RS90R/RSG90/RS90M/RST90/RST90TF