Yamaha NEOS 50 YN50 (2002) [96/161] Carburetor

CARB

CARBURETOR

5-4

4. Check:

• throttle valve 

Wear/Damage



Change

5. Check:

• throttle valve displacement

Irregular movement/Catches



Change

Insert the throttle valve  in the body 

and check its displacement.

6. Check:

• throttle stop screw 

• pilot air screw 

• jet needle 

• starter plunger 

Wear/Damage



Change

7. Measure:

• Float height

a

Outside specifications



Check valve,

float and valve seat



Steps for measuring the height of the float:

• Assemble the valve, float and axle on the

carburettor body

• Turn the carburettor upside down

• Using a vernier caliper, measure the distance

between the plane of the bowl gasket (wit-

hout the gasket) and the upper part of the

float.

Float height a

15.0 mm ~ 17.0 mm