Yamaha YFM660FS, Supplementary Service Manual

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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 ----
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