Gilera Runner RST 50 SP, Service Station Manual, Page: 10 / 183

Wheels and tyres
WHEELS AND TIRES
Specification Desc./Quantity
Front wheel rim In diecast aluminium alloy - 3.00x14"
Rear wheel rim
In diecast aluminium alloy - 3.50x13"
Front tire 120/70 - 14'' 55L Tubeless
Rear tire 140/60 - 13'' 57L Tubeless
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
DELL'ORTO CARBURETTOR
Specification Desc./Quantity
Type PHVA 17.5 ID
Diffuser diameter Ø 17.5
Reference number of adjustment 8439
Maximum nozzle: 53
Maximum air nozzle (on the body): Ø 1.5
Tapered pin stamped code: A22
Pin position (notches from above): 1
Diffuser: 209 HA
Characteristics
Runner RST 50 SP
CHAR - 10