Checking The Cylinder Head Breather Hose; Checking The Exhaust System; Adjusting The Exup Cables - Yamaha WR250R Service Manual

EAS21050
CHECKING THE CYLINDER HEAD
BREATHER HOSE
1. Remove:
Seat
G
Side cover (left/right)
G
Air scoop (left/right)
G
Refer to "GENERAL CHASSIS" on page 4-1.
Fuel tank
G
Refer to "FUEL TANK" on page 7-1.
2. Check:
Cylinder head breather hose "1"
G
Cracks/damage → Replace.
Loose connection → Connect properly.
ECA14920
CAUTION:
Make sure the cylinder head breather hose is
routed correctly.
3. Install:
Fuel tank
G
Refer to "FUEL TANK" on page 7-1.
Air scoop (left/right)
G
Side cover (left/right)
G
Seat
G
Refer to "GENERAL CHASSIS" on page 4-1.
EAS21080

CHECKING THE EXHAUST SYSTEM

The following procedure applies to all of the ex-
haust pipes and gaskets.
1. Remove:
Muffler protector
G
2. Check:
Exhaust pipe
G
Muffler
G
Cracks/damage → Replace.
Gasket
G
Exhaust gas leaks → Replace.
3. Check:
Tightening torque
G
1
4. Install:
Muffler protector
G
EAS21100

ADJUSTING THE EXUP CABLES

1. Remove:
Side cover (left/right)
G
Refer to "GENERAL CHASSIS" on page 4-1.
2. Remove:
EXUP valve pulley cover "1"
G
3-15
Exhaust pipe nut "1"
20 Nm (2.0 m•kg, 14 ft•lb)
Exhaust pipe and muffler bolt "2"
20 Nm (2.0 m•kg, 14 ft•lb)
Muffler and muffler bracket bolt
"3"
42 Nm (4.2 m•kg, 30 ft•lb)
1
2
Muffler protector bolt
7 Nm (0.7 m•kg, 5.1 ft•lb)
ENGINE
3