Yamaha YZ85(R)/LC, Owner'S Service Manual

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T U N
SETTING
Pilot jet adjustment
The richness of air-fuel mixture with the throttle
fully closed to 1/2 open can be set by turning
the pilot jet
1
. It is changed when adjustment
cannot be made by the pilot air screw alone.
A larger size jet results in a richer mixture at
low speeds, and a smaller size in a leaner mix-
ture.
Standard pilot jet #45
5PA70070
Jet needle adjustment
The richness of air-fuel mixture with 1/4 ~ 3/4
throttle can be set by changing the jet needle
1
.
A smaller diameter jet needle results in a richer
mixture at middle speeds, and a larger diame-
ter in a leaner mixture.
Standard jet needle NBKF
5PA70080