OFNA Racing Picco .21 Comp - Manual (Page 3)

OFNA/PICCO .21 SPORT/COMP
ENGINE
7MM CARBURETOR ADJUSTMENTS
IDLE GAP - Shown in fig 1, you can see the idle gap.
Adjust idle screw to increase or lower engine idle. Never let
barrel fully close or adjust idle from only radio.
FACTORY SETTING - .5mm (.20)
IDLE SCREW
figure 1
figure 2
FUEL INLET NIPPLE
THROTTLE LINKAGE BALL
LOW END NEEDLE - Shown fig. 2 is the Low End Needle, which is
preset by Picco. You can adjust this needle after break-in if needed.
When turning this needle, make only small 1/16 turns.
FACTORY SETTING - TURN IN UNTIL STOPS, DO NOT OVER
TIGHTEN. TURN COUNTER CLOCKWISE 10.5 TO 11.5 TURNS
This special carburetor has the high heat nylon body to counter act heat
from the engine that may boil the fuel before entering the engine. Over
heated fuel causes tuning problems that are hard to resolve. This new
design will give you much better performance.
MASTER NEEDLE - Adjust this needle for best power and temp. The preset setting
should be 2 to 2 1/8 OUT. It is recommended to turn this needle "OUT" during
break-in (richer mixture) if engine is too hot.
FACTORY SETTING - 2.5 TURNS OUT.
You should never see fuel leak
from this area.