Adjusting The Timing Chain; Adjusting The Idling Speed - Yamaha 2004 YXR660 Service Manual

ADJUSTING THE TIMING CHAIN/

ADJUSTING THE IDLING SPEED

ADJUSTING THE TIMING CHAIN
Adjustment free.
ADJUSTING THE IDLING SPEED
1. Start the engine and let it warm up for sev-
2. Remove:
• driver seat
• passenger seat
• console
3. Lift the cargo bed up.
4. Attach:
• tachometer
5. Check:
• engine idling speed
6. Adjust:
• engine idling speed
M MMM
a. Turn the throttle stop screw 1 in or out until
Turning in
Turning out
L LLL
3 - 6
eral minutes.
Refer to "SEATS, ENCLOSURE, HOOD
AND CARGO BED" in chapter 8.
(to the spark plug lead)
Digital engine test tachometer
P/N. YU-8036-C
Engine tachometer
P/N. 90890-03113
Out of specification → Adjust.
Engine idling speed
1,450 ~ 1,550 r/min
M MMM M M MMM M M MMM M
the specified idling speed is obtained.
Idling speed becomes
higher.
Idling speed becomes
lower.
L LLL L L LLL L L LLL L
CHK
ADJ
M MMM M M MMM M MMM
L LLL L L LLL L LLL