Yamaha MX250 - Cylinder Head, Valves, and Piston Assembly

3-22
1
2
3
4
5
6
7
8
9
10
ENGINE
CYLINDER HEAD COVER, CYLINDER HEAD
CYLINDER HEAD COVER, CYLINDER HEAD
Order Job/Parts to remove Q’ty Remarks
Removing the cylinder head cover, cyl-
inder head
Remove the parts in the order listed.
Fuel tank Refer to “FUEL TANK” on page 3-4.
Muffler Refer to “MUFFLER” on page 3-6.
Air filter Refer to “AIR FILTER” on page 3-3.
Carburetor
Refer to “REMOVING THE CARBURETOR”
on page 4-1.
Flywheel cover Refer to “FLYWHEEL” on page 3-12.
1 Spark plug cap 1
2 Spark plug 1
3 Cylinder head cover 1
4 Cylinder head cover gasket 1
5 Cylinder air shroud 1
6 Locknut 2
7Adjuster 2
8 Screw 2
5
4
3
2
6
7
8
6
7
8
1
11 N · m (1.1 kgf · m, 8.1 lb · ft)
2.3 N · m (0.23 kgf · m, 1.7 lb · ft)
7 N · m (0.7 kgf · m, 5.2 lb · ft)
20 N · m (2.0 kgf · m, 15 lb · ft)
50 N · m (5.0 kgf · m, 37 lb · ft)
12 N · m (1.2 kgf · m, 8.9 lb · ft)
1st
2nd