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SPEC
MAINTENANCE SPECIFICATIONS
ENGINE
Item
Standard
Limit
Carburetor:
I. D. mark
5KMA 10
----
Main jet
(M.J)
#153.8
----
Main air jet
(M.A.J)
#70
----
Jet needle
(J.N)
6JPH9-53-2
----
Needle jet
(N.J)
O-0M
----
Pilot air jet
(P.A.J.1)
#60
----
Pilot air jet
(P.A.J.2)
1.5
----
Pilot outlet
(P.O)
1.1
----
Pilot jet
(P.J)
#40
----
Pilot screw
(P.S)
3 turns out
----
Bypass 1
(B.P.1)
0.8
----
Bypass 2
(B.P.2)
0.8
----
Bypass 3
(B.P.3)
0.8
----
Valve seat size
(V.S)
3.0
----
Starter jet
(G.S.1)
#55
----
Starter jet
(G.S.2)
0.8
----
Throttle valve size
(Th.V)
#105
----
Float height
(F.H)
13 mm (0.51 in)
----
Fuel level
(F.L)
4.5 mm (0.18 in)
----
Engine idle speed
1,450 ~ 1,550 r/min
----
Intake vacuum
30.7 ~ 33.3 kPa
(230 ~ 250 mmHg, 9.07 ~ 9.83 inHg)
----
MAINTENANCE SPECIFICATIONS
Summary of Contents for YFM660FWA
Page 1: ...YFM660FS 5KM2 AE3 SUPPLEMENTARY SERVICE MANUAL ...
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Page 20: ...YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN ...