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Model
Carburetor:
Type × quantity
Manufacturer
I.D. mark
Main jet
Main air jet
Jet needle
Needle jet
Pilot jet
Pilot air jet
Pilot outlet
Bypass 1
Throttle valve
Valve seat size
Starter jet
Float height
Fuel level (below the line on the float cham-
ber)
Throttle cable free play
Engine idle speed
Fuel pump:
Type
Manufacturer
Oil filter:
Oil filter type
Bypass valve opening pressure
Oil pump:
Oil pump type
Inner-rotor-to-outer-rotor-tip clearance
Outer-rotor-to-oil-pump-housing clearance
Relief valve operating pressure
Oil pressure (hot)
Cooling system:
Filler cap opening pressure
Water pump type
Reduction ratio
Thermostat
Opening temperature
Valve lift
Coolant type
Coolant mixing ratio (coolant: water)
Capacity
Max. impeller shaft tilt
<Limit>
MAINTENANCE SPECIFICATIONS
RS90N/RS90NR/RS90RS/RS90GT/RS90MS
CVK40 × 3
KEIHIN
8ES1 01
(M.J)
#148
(M.A.J)
#70
(J.N)
N425-BSJ00
(N.J)
W9554-26538#6
(P.J)
#45
(P.A.J)
#120
(P.O)
0.9
(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
(Th.V)
1020-B70-B0 (θ = 10°)
(V.S)
1.2
(G.S)
#70
(F.H)
16 mm (0.630 in)
0.2 ~ 2.2 mm (0.008 ~ 0.087 in)
2.0 ~ 3.0 mm (0.08 ~ 0.12 in)
1,300 ~ 1,500 r/min
Diaphragm
8FA (MIKUNI)
Cartridge (paper)
78 ~ 118 kPa (0.78 ~ 1.18 kg/cm
Trochoidal
0.09 ~ 0.15 mm (0.004 ~ 0.006 in)
0.03 ~ 0.08 mm (0.001 ~ 0.003 in)
440 ~ 560 kPa (4.4 ~ 5.6 kg/cm
45 kPa (0.45 kg/cm
95.0 ~ 125.0 kPa (0.95 ~ 1.25 kg/cm
Single-suction centrifugal pump (Impeller type)
22/28 (0.786)
69.0 ~ 73.0 °C (156.2 ~ 163.4 °F)
7.0 mm (0.28 in)/85 °C (185 °F)
High quality silicate-free ethylene glycol antifreeze contain-
ing corrosion inhibitors
3 : 2 (60% : 40%)
4.8 L (4.22 Imp qt, 5.07 US qt) (RS90N/RS90NR/RS90RS/
RS90GT)
5.6 L (4.93 Imp qt, 5.92 US qt) (RS90MS)
0.15 mm (0.0059 in)
0.072 mm (0.0028 in)
101
SPEC
2
, 11.1 ~ 16.8 psi)
2
, 62.6 ~ 79.6 psi)
2
, 6.40 psi) at 1,400 r/min
2
13.5 ~ 17.8 psi)
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