1987-2003 Yamaha YFZ350 Banshee supplementary service manual, Page 88Get this manual
DRIVE CHAIN SLACK ADJUSTMENT ADJ
Drive chain slack measurement steps: Elevate the rear wheels placing suitable stand under the engineRotate the rear wheel several timesCheck the chain slack several times find the point where the chain is the tightestCheck the chain slack when the wheel in this "tight chain" positionDrive Chain Slack (a): Standard: 15 (0.6 in) Limit: 40 (1.6 in) If the chain slack exceeds the limit 140 (1.6 in)], adjust the chain slack
Drive Chain Slack Adjustment 1Adjust: Drive chain slack Drive chain slack adjustment steps: Loosen the rear wheel hub upper bolts Loosen the rear wheel hub lower bolts Loosen the adjuster locknut Adjust chain slack by turning the adjuster (4)To adjuster (4) clockwiseTo Loosen+ Turn adjuster (4) counterclockwise and push wheel forwardTurn each adjuster exactly the same amount maintain correct axle alignment(There are marks (5) on each side of chain puller alignment