Yamaha MIO Service Manual page 194

1
CARBURETOR
2. Check:
• fuel cock operation
M MMM M MMM M M MMM
a. Suck on the end of the vacuum hose 1.
Fuel flows.
Fuel does not flow.
L LLL L LLL L L LLL
5 - 10
CARB
M M MMM M M MMM M
Fuel cock is OK.
Replace the fuel
cock.
L L LLL L L LLL L
M MMM M MMM
L LLL L LLL