140 Adjustments for Competition
(6)
(5)
(5)
(8)
(7)
(6)
(8)
0 – 0.1 in (0 – 3 mm)
(5)
(5) air vent hoses
(6) over ow hose
(7) fuel line
(8) fuel line clamps
Carburetor Adjustment & Tuning Tips
Idle Speed Adjustment
1. If the engine is cold, start it and warm it up 3
minutes. Then shut it off.
2. Connect a tachometer to the engine.
3. Shift the transmission into neutral. Start the
engine.
4. Keep the motorcycle in an upright position.
5. Adjust idle speed with the throttle stop screw
(1).
Idle speed:
1,700 ± 100 rpm
(1)
(1) throttle stop screw
17CRF450X31MEY710.indb14017CRF450X31MEY710.indb140 2016/06/0811:46:252016/06/0811:46:25
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