Yamaha MX250 - Carburetor Checks and Specifications

4-3
1
2
3
4
5
6
7
8
9
10
CARBURETOR
DISASSEMBLING THE CARBURETOR
CHECKING THE CARBURETOR
1.
Measure:
• Float height “a”
Out of specification  Replace.
TIP
• Lift up the float so that the tip of the float valve lightly
contacts the float arm, and then measure the float height
“a”.
• Do not adjust the float height.
2.
Check:
•Jets
• Carburetor body
Clogged  Apply compressed air to clean the jet.
3.
Check:
• Valve seat
Wear/damage  Replace.
Dirt  Clean.
a
Float height:
13.8 mm (0.54 in)
a
b
a. Wear at groove
b. Dirt