Adjusting The Exhaust Gas Volume; Checking The Crankcase Breather Hose; Replacing The Air Filter Element And Cleaning The Check Hose - Yamaha YZF-R25 Service Manual

• Exhaust pipe bolt "6"
• Muffler assembly bolt "7"
• Exhaust pipe joint bolt "8"
Exhaust pipe nut
15 Nm (1.5 m·kgf, 11 ft·lbf)
Exhaust pipe bolt
20 Nm (2.0 m·kgf, 14 ft·lbf)
Muffler assembly bolt
20 Nm (2.0 m·kgf, 14 ft·lbf)
Exhaust pipe joint bolt
20 Nm (2.0 m·kgf, 14 ft·lbf)
7
6
4
2
8
EAS30799

ADJUSTING THE EXHAUST GAS VOLUME

TIP
• Be sure to set the CO density level to standard,
and then adjust the exhaust gas volume.
• To adjust the exhaust gas volume, use the CO
adjustment mode of the Yamaha diagnostic
tool. For more information, refer to the opera-
tion manual of the Yamaha diagnostic tool.
1. Connect the Yamaha diagnostic tool to the
coupler. For information about connecting the
Yamaha diagnostic tool, refer to "YAMAHA
DIAGNOSTIC TOOL" on page 8-34.
Yamaha diagnostic tool
90890-03231
3
1
5
3-11
PERIODIC MAINTENANCE
EAS30800
CHECKING THE CRANKCASE BREATHER
HOSE
1. Remove:
• Side panel (left)
Refer to "GENERAL CHASSIS (2)" on page
4-3.
• Front bottom cowling (left)
Refer to "GENERAL CHASSIS (3)" on page
4-5.
• Coolant reservoir
Refer to "RADIATOR" on page 6-1.
2. Check:
• Crankcase breather hose "1"
Cracks/damage → Replace.
Loose connection → Connect properly.
ECA13450
NOTICE
Make sure the crankcase breather hose is
routed correctly.
1
3. Install:
• Coolant reservoir
Refer to "RADIATOR" on page 6-1.
• Front bottom cowling (left)
Refer to "GENERAL CHASSIS (3)" on page
4-5.
• Side panel (left)
Refer to "GENERAL CHASSIS (2)" on page
4-3.
EAS30627
CHECKING THE AIR INDUCTION SYSTEM
Refer to "CHECKING THE AIR INDUCTION
SYSTEM" on page 7-18.
EAS31130
REPLACING THE AIR FILTER ELEMENT
AND CLEANING THE CHECK HOSE
TIP
There is an air filter check hose "1" at the bottom
of the air filter case. If dust and/or water collects
in this hose, clean the air filter check hose and
replace the air filter element.