Throttle Lever Adjustment; Idle Speed - Yamaha YTZ250S 1986 Service Manual

Throttle Lever Adjustment
1. Loosen the locknut and turn the adjuster
until there is the specified freeplay at
throttle lever.
1. Adjuster 2. Locknut
Throttle lever play:
3 - 5 mm (0.12 - 0.20 in)
2. After adjustment, start the engine and
check throttle operation. Turn the
handlebars from lock to lock and note if
the engine speeds up; if it does, the
cable adjustment is too tight and must be
readjusted.
3.
Adjust the speed limiter (adjuster) as his
riding technique. Turning the adjuster in
decreases the top speed and turnning it
out increases the top speed.
CD
Adjuster
~
Locknut
2-8
WARNING:
• Particularly for a beginner rider, the
speed limiter should be screwed in
completely. Screw it out little by lit-
tle as his riding technique improves.
Never remove the speed limiter from
the outset.
• For proper throttle lever operation, do
not turn out the adjuster more than
12 mm (0.47 in).
Idle Speed
1.
Screw in the pilot air screw until it is
lightly seated.
2.
Back out by the specified number of
turns. Start the engine and let it warm
up.
Pilot air screw setting:
2.0 turn out
1. Pilot air screw
3. Loosen the locknut on the throttle stop
screw and turn the screw until the idle is
at the desired rpm.