1998-2004 Honda Foreman 450 factory service manual, Page 107Get this manual

FUELSVSTEM Remove the primer knob and spring

Check the diaphragm for tears or other damage
DIAPHRAGM

DIAPHRAGMVACUUM PISTON
NOTE: The diaphragmvacuum piston can be removed without removing the float chamberRemove the vacuum chamber cover by removing the four screws

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives