Yamaha MX250 - Adjusting the Engine Speed

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PERIODIC CHECKS AND ADJUSTMENTS
PERIODIC MAINTENANCE
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Measurement steps:
a. Move the throttle lever “1” to the high engine speed
position “a”.
b. Check the high engine speed.
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4.
Measure:
• Low engine speed (with no load)
Out of specification  Adjust.
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Measurement steps:
a. Move the throttle lever “1” to the low engine speed
position “a”.
b. Check the low engine speed.
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ADJUSTING THE ENGINE SPEED
1.
Warm up the engine for several minutes.
2. Attach:
• Digital tachometer “1”
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a
Low engine speed:
1900–2100 r/min
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a
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Digital tachometer:
YU-39951-B, 90890-06760