Checking The Air Induction System - Yamaha XT660R Service Manual

AIR INDUCTION SYSTEM
Br/R R/W
7 - 36
EAS00918

CHECKING THE AIR INDUCTION SYSTEM

1. Check:
• hoses
Loose connections → Connect properly.
Cracks/damage → Replace.
• pipe
Cracks/damage → Replace.
Refer to "CYLINDER HEAD" in chapter 5.
2. Check:
• reed valve
• reed valve stopper
• reed valve seat
Cracks/damage → Replace the reed valve
assembly.
3. Check:
• air cut-off valve
Cracks/damage → Replace.
4. Check
• Air induction system solenoid
M MMM M MMM M M MMM M
a. Remove the air induction system solenoid
coupler from the air cut-off valve assembly.
b. Connect the pocket tester (Ω × 1) to the air
induction system solenoid terminal as
shown.
Positive tester probe → brown/red 1
Negative tester probe → red/white 2
c. Measure the air induction system solenoid
resistance.
Out of specification → Replace the air cut-
off valve assembly.
Air induction system solenoid
resistance
18 ~ 22 Ω at 20 °C (68 °F)
L LLL L LLL L L LLL L
FI
M MMM M M MMM M M MMM M
L LLL L L LLL L L LLL L
MMM
LLL