Royal Enfield Classic 350 Service Manual download pdf (Page 171)

07-3

CARBURETOR PERFORMS THREE

IMPORTANT FUNCTIONS :

1. It varies the air-fuel ratio according

to the operating conditions and

requirements of the engine.

2. It produces a mixture which is

properly atomized. Atomization is

the mixing of air and fuel to form a

fine spray or mist and to deliver the

mixture to the engine.

3. It regulates the amount of air - fuel

mixture required by the engine.

P In order to meet requirements for

the proper mixture ratio under

various conditions the following

systems are being used in Butterfly

slide (BS) type carburetors.

1.1 Fuel Inlet and Float System

1.2 Starter System

1.3 Pilot System (Slow Speed System)

1.4 Main System (High Speed System)

CARBURETOR REMOVAL

REMOVAL :

3 Turn the fuel tap to the “OFF “

position.

3 Disconnect fuel hose from

carburetor by pressing clip.

3 Loosen cable outer nut and lock nut

by 10 mm spanner. Slip the tip of

the cable from the slot in the throttle

pully.

3 Drain the petrol from carburetor

float chamber in a separate pan /

tray by loosing drain screw.

NOTE :

After following the above said pro-

cedure for removal of carburetor from the

motorcycle carefully.

3 Unscrew completly the drain screw

from the float chamber body if

nessasary.

3 Remove strap from Air filter bellow.

3 Loosen the clip screw from bellow

and flange carburetor.

3 Tilt and twist to remove the

carburetor gently.

1. Jet Needle

2. Needle Jet

3. Main Air Jet

4. Diaphragm

5. Piston Valve

6. Buterfly Valve

7. Mixture

8. Petrol

9. Main Jet

10. Air

11. Jet Holder

Functions of Carburetor

1 2 ... 166 167 168 169 170 171 172 173 174 175 176 ... 228 229

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