2009 Suzuki 400 LTZ Quad Sport Service Manual, Page 40Get this manual
0B-16 Maintenance and Lubrication: Drive chain length inspection 1) Place the vehicle on level ground2) Loosen the rear axle housing bolts (1)3) Tense the drive chain fully by turning chain adjuster nut (2)3) Loosen or tighten the chain adjuster nut (2) until there is 30 40 mm (1.2 1.6 in) "a" of slack at the middle of the chain between the engine and rear sprockets as shown in the figureDrive chain slack "a" Standard 30 40 mm (1.2 1.6 in)
I933H1020038-02
I933H1020039-01