Yamaha MM700F, Service Manual

Page: 114 / 589

2-40
INSP
ADJ
CARBURETOR TUNING
TUNING
CARBURETOR TUNING
The carburetors are set at the factory to run at
temperatures of 0°C ~ –20°C (32°F ~ –4°F) at
sea level. If the machine is to be operated under
conditions other than those specified above, the
carburetors must be properly adjusted. Special care
should be taken in carburetor setting so
that the pistons will not be damaged or will not seize.
CAUTION:
Engine oil is mixed with fuel just before the fuel
enters the carburetors. During initial fuel flow to
the carburetors, it is not always possible to sup-
ply the optimum fuel/oil mixture depending on
the throttle opening. Therefore, after the carbure-
tors have been tuned or maintained, or after the
float chambers are removed for cleaning or jet
replacement, be sure to idle the engine for about
three minutes in order to avoid engine trouble.
CAUTION:
Before performing the carburetor tuning, make
sure that the following items are set to
specification.
•
Engine idle speed
•
Throttle cable free play
•
Carburetor synchronization
•
Starter cable free play
•
Oil pump cable free play
Carburetor tuning data
1. Standard specifications
Å
Type
ı
Manufacturer
Ç
I.D. Mark
Î
Main jet (M.J.)
‰
Pilot jet (P.J.)
Ï
Pilot screw (P.S.)
Ì
Float height
Ó
Idle speed
TM33
MIKUNI
8CH10
#1:145, #2, 3:143.8
#45
1-1/2 turns out
11.3 ~ 15.3 mm
(0.44 ~ 0.60 in)
1,600
±
100 r/min