Yamaha YFM400AS Owner's Manual page 149

Brake lever free play adjustment
1. Loosen the locknut and fully turn in the
adjusting bolt at the brake lever.
1. Locknut 2. Adjusting bolt
2. Turn in the adjusting nut on brake cable
to provide a gap of 0–1 mm (0–0.04 in)
between the brake camshaft lever and
the pin.
1. Adjusting nut (brake lever cable) a. Gap
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