Yamaha Rhino 450 YXR45FAV Service Manual page 238

CARBURETOR
4. Check:
• piston valve 1
Scratches/wear/damage → Replace.
• rubber diaphragm 2
Tears → Replace.
5. Check:
• vacuum chamber cover 1
• spring 2
Cracks/damage → Replace.
6. Check:
• diaphragm (coasting enricher) 1
• spring 2
• cover 3
Tears (diaphragm) /damage → Replace.
7. Check:
• jet needle 1
• main jet 2
• needle jet 3
• pilot air jet 4
• pilot jet 5
• starter jet 6
• starter plunger 7
Bends/wear/damage → Replace.
Blockage → Blow out the jets with com-
pressed air.
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FUEL