Reference Carburetion (Competition Only) - GAS GAS Enduro 2T 250 2018 Owner's Manual

Owner's Manual
Carburator setting * for xC model
3
2
1
CarBurettOr neeDle
The needle and the needle diffuser together have an effect from 25% to 75%
1
load. The needle moves inside the diffuser; when the needle narrows, from being
cylindrical (1) to being conical (2), its position determines the amount of fuel
admitted.
at the top of the needle there are five slots (3) where the clip is attached. This
clip places the needle in the throttle valve and determines the relative position to
the diffuser (that is why the mixture is enriched). moving the clip up impoverishes
the mixture. change the position of the clip step by step (the cylindrical part of the
needle affects the response of the throttle valve to its small openings).
The position of the clip is set by counting from the top position, which is the one
that implies greater closure of fuel passage through the diffuser.
Main jet
it has a greater effect from 75% to 100% load. The number printed on the bottom
of the jet (1) indicates the flow of petrol passing through the hole. a larger number
corresponds to a larger hole, more petrol passes through.
note: never use the "jet gauge sets" that are on the market. Their use is
incoRREcT. always use new and unmanned jets (sealed in their bags) of original
replacement.
petrol is extremely flammable and can be explosive under certain conditions.
Whenever you handle the carburettor, stop the engine and do not smoke. make
sure the area is ventilated and there are no sparks or flames nearby (includes light
from a bulb).

referenCe CarBuretiOn (COMPetitiOn Only)

Needle position
DanGer
200cc
main jet 185
idle jet 45
needle noZI
Throttle valve 6
air screw 1 and 1/2 turns from closed
-60-
250cc 300cc
175 175
42 42
n1ef
3rd from above
7 7