Secondary Air; Dell'orto Carburettor 50Cc Version - Gilera DNA 50 Workshop Manual

DNA 50

Secondary air

To clean the sponge filters of the secondary air
system, proceed as follows:
Unscrew the two studs ( 2) of the aluminium lid of
the secondary air box to access the polyurethane
sponge contained inside the box; after cleaning
with water and neutral soap, dry the sponge with
a clean cloth and reassemble the system, check-
ing that the steel blade is not warped and/or does
not guarantee the seal on its strike surface; re-
place if necessary.
N.B.
UPON REFITTING, MAKE SURE TO CORRECTLY FIT THE
TAB IN ITS FITTING ON THE TWO PLASTIC AND ALUMI-
NIUM COVERS.
CAUTION
DURING THE OPERATION, CHECK THE INTEGRITY AND
SEAL OF THE TWO SLEEVES (3) IN RUBBER LOCATED
AT THE ENDS OF THE SECONDARY AIR HOSE; IF NEC-
ESSARY, REPLACE THEM USING NEW CLAMPS TO FAS-
TEN.
Carburettor
50cc Version
Dell'Orto
Specification
Diffuser diameter
Reference number of adjustment
Maximum nozzle:
Maximum air nozzle (on the body):
Tapered pin stamped code:
Pin position (notches from above):
Diffuser:
Minimum nozzle:
Minimum air nozzle (on the body):
Secondary minimum air hole
Initial minimum mix screw opening:
Starter jet
Starter air nozzle (on the body):
Stroke of starter pin:
Fuel inlet hole
DELL'ORTO CARBURETTOR
Type
Characteristics
Desc./Quantity
PHVA 17.5 ID
Ø 17.5
8439
53
Ø 1.5
A22
1
209 HA
32
Free
Ø 2.5
1 1/2
50
Ø 1.5
11 mm
Ø 1.0
CHAR - 11