User's Manual

7 - 4

TUN

SETTING

Pilot system

The FLATCR carburetor is manufactured with

a pilot screw. The pilot screw adjustment

ranges from fully closed throttle to 1/4 open

throttle.

Main jet adjustment

The richness of the air-fuel mixture at full throt-

tle can be set by changing the main jet

* Except for USA

If the air-fuel mixture is too rich or too lean, the

engine power will drop, resulting in poor accel-

eration.

Effects of changing the main jet (reference)

Idle

Fully open

Standard main jet

#150

*#160

1/4 1/2 3/4

+10%

#150

–10%

#160

#140