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| Pre- | Every | |
Item | Routine | operation | 6 months | 12 months |
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| check | or 100 Hr | or 300 Hr |
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Crankcase breather | • Check breather hose for cracks or |
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damage. |
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| 1 | |
hose |
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• Replace if necessary. |
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Cylinder head | • Decarbonize cylinder head. |
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| ★ |
• More frequently if necessary. |
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Valve clearance | • Check and adjust when engine is cold. |
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| ★ |
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Fittings / fasteners | • Check all fittings and fasteners. |
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| ★ |
• Correct if necessary. |
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The point where abnormality was recognized by use. | 1 |
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*1·····Initial replacement of the engine oil is after one month or 20 hours of operation.
*2·····The air filter element needs to be cleaned more frequently when using in unusually wet or dusty areas.
★····· Since these items require special tools, data and technical skills, have a Yamaha dealer perform the ser- vice.
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