2009 Suzuki 400 LTZ Quad Sport Service Manual, Page 199Get this manual
1D-57 Engine Mechanical: Crankshaft runout Support the crankshaft using V-blocks and measure the crankshaft runout using the dial gauge, as shownIf the runout exceeds the service limit, replace the crankshaft with new oneNOTE Place the crankshaft onto the V-blocks so that it becomes horizontally Measure the runout from the tips of the crankshaftCrankshaft runout Service limit: 0.08 mm (0.003 in) Special tool (A): 0990020607 (Dial gauge (1100 mm, 10 mm))0990020701 (Magnetic stand)0990021304 (V-block (100 mm)) Balancer Shaft Inspection
Inspect the balancer shaft in the following procedures: 1) Separate the crankcase, left and rightRefer to "Engine Bottom Side Disassembly (Page 1D-41)"2) Remove the balancer shaft (1)
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3) Inspect the balancer shaft for wear or damageIf any defects are found, replace the balancer shaft with new one