Handling Note; Removal Points; Throttle Valve; Pilot Air Screw - Yamaha TT-R125(M) Owner's Service Manual

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HANDLING NOTE

At high altitudes, the atmospheric pressure is

lower. This can make the fuel mixture too rich,

leading to such problems as fouled.

Spark plugs and slow response at high engine

speeds. A special part, High Altitude Main Jet

1 # 102.5 (620-1423A-71-A0) is available to

correct this.

Throttle valve 1

Spring (throttle valve) 2

Carburetor top cover 3

Throttle cable 4

While compressing the spring (throttle valve),

disconnect the throttle cable.

Pilot air screw 1

To optimize the fuel flow at a smaller throttle

opening, each machine's pilot air screw has

been individually set at the factory. Before

removing the pilot air screw, turn it in fully and

count the number of turns. Record this number

as the factory-set number of turns out.