Timing Chain; Valve Clearance; Checking The Front And Rear Brake Shoes - Yamaha YFM80GX Owner's Manual

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Timing chain

The timing chain stretches with use, resulting in im-
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proper valve timing and engine noise. To prevent
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this from occurring, the timing chain tensioner
must be adjusted by a Yamaha dealer at the inter-
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vals specified in the periodic maintenance and lu-
brication chart.
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Valve clearance

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The valve clearance changes with use, resulting in
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improper air-fuel mixture and/or engine noise. To
prevent this from occurring, the valve clearance
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must be adjusted by a Yamaha dealer at the inter-
vals specified in the periodic maintenance and lu-
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brication chart.
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Checking the front and rear brake
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shoes
The front and rear brake shoes must be checked
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for wear at the intervals specified in the periodic
maintenance and lubrication chart. Each brake is
provided with a wear indicator, which allows you to
check the brake shoe wear without having to dis-
assemble the brake. To check the brake shoe
wear, check the position of the wear indicator while
applying the brake. If a brake shoe has worn to the
point that the wear indicator reaches the wear limit
line or mark, have a Yamaha dealer replace the
brake shoes as a set.
Front brake
1. Wear limit line
2. Wear indicator
8-22
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