VENTO MOTORCYCLES
Rev no.01/ page 55of 84
CARBURETOR REMOVAL & INSTALLATION
REMOVAL:
1. Remove rear seat of motorcycle.
2. Turn fuel switch “OFF” position.
3. Disconnect fuel pipe from carburetor by pressing clip.
4. Loosen the clamp over air cleaner connecting tube (Air duct).
5. Drain the fuel from carburetor float chamber in a separate pan loosening drains screw.
6. Remove spark plug wire (HT lead) along with suppressor cap from the spark plug.
7. Remove insulator-mounting bolts (2 Nos.)
8. Pull out the carburetor assy. Along with insulator from air duct to the LH side.
9. Open the carburetor top cap, pull out the throttle valve along with needle, clip, spring & throttle cable.
10. Remove the overflow/drain pipe.
INSTALLATION:
FOLLOW THE REVERSE ORDER OF REMOVAL
NOTE:
• After installation check for any fuel leakage from the carburetor or fuel line.
• Check for the throttle smooth movement; if necessary adjust throttle grip free play 2 to 4 mm.
CARBURETTOR ASSEMBLY
DISASSEMBLY PROCEDURE FOR CARBURETTOR CLEANING:
• Remove the throttle valve from the accelerator cable by compressing the spring up from the seat in long slit.
Remove the tip of the cable from the slot of the valve.
• Remove the jet needle from the throttle valve along with clip and plate.
• Remove the airscrew with spring.
• Remove the Idling screw with spring.
• Remove the float chamber by unscrewing three screws.
• Pull out the float arm pin to remove the float.
• Remove the main jet along with jet holder and needle.
• Remove the slow jet.
• Now clean all the carburetor components and apply compressed dry air in all passages (galleries)
NOTE:
• Don’t remove clip from the jet needle groove.
• Ensure that float and float valve is being removed before carrying out any other jobs on carburetor. So
that these components will not get damage.
ASSEMBLY PROCEDURE OF CARBURETTOR:
1. Screw the slow jet (Ensure that all holes are clearly visible on the slow jet body).
2. Fix needle jet from main jet hole (Ensure that the smaller dia face towards carburetor body hole).
1. Tighten the needle jet holder (Ensure that all holes clearly visible on the needle jet holder body).
2. Screw the main jet along with jet holder.
3. Insert the float arm pin through the pivot and the float.
4. Check float height (Specified 12.5±1mm) if necessary then adjust.
5. Fix the float chamber.
9. Fix idle screw and airscrew along with spring (Initial airscrew setting one and half turn out).
6. Insert the jet needle along with clip and plate into the throttle valve (Ensure that needle lock clip is in 3
rd
Groove position from top).
7. Connect the throttle valve to the accelerator cable first compress the spring into the cap, Insert the tip of the
cable through the slot in the throttle valve base and fix cable in long slit rest position.
8. Align the groove on the side of the throttle valve with the guide pin in the carburetor body. Check for its smooth
movement.
9. Tighten the top cap over carburetor body.
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