ÅClosed ı Fully open

SETTING T U N

Effects of the setting parts on the throttle valve opening

1

2

3

4

Å 1/8 1/4

1/2

3/4

ı

1Pilot screw/pilot jet

2 Throttle valve cutaway

3 Jet needle

4 Main jet

Main system

The FLATCR carburetor has a primary main jet. This type of main jet is perfect for racing motorcycles since it supplies an even flow of fuel, even at full load. Use the main jet and the jet needle to set the carburetor.

1Jet needle

2 Pilot air jet

3 Needle jet

4 Main jet

5 Pilot jet

6 Pilot screw

7 - 3

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Image 321
Yamaha WR45OFR service manual Setting T U N, Effects of the setting parts on the throttle valve opening, Main system