Yamaha YZ250F(P)/LC Owner's Service Manual page 228

DRIVE CHAIN SLACK ADJUSTMENT
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5. Install:
Drive chain 1
G
Joint 2
G
Master link clip 3
G
CAUTION:
Be sure to install the master link clip to the
direction as shown.
a Turning direction
6. Lubricate:
Drive chain
G
Drive chain lubricant:
SAE 10W-30 motor oil or suit-
able chain lubricants
EC36A060
DRIVE CHAIN SLACK ADJUSTMENT
1. Elevate the rear wheel by placing the
suitable stand under the engine.
2. Check:
Drive chain slack a
G
Above the seal guard installation bolt.
Out of specification → Adjust.
Drive chain slack:
40 ~ 50 mm (1.6 ~ 2.0 in)
NOTE:
Before checking and/or adjusting, rotate the
rear wheel through several revolutions and
check the slack several times to find the tight-
est point. Check and/or adjust the drive chain
slack with the rear wheel in this "tight chain"
position.
INSP
ADJ