2008 Suzuki LT-A400/F, LT-F400/F ATV Service Manual, Page 100Get this manual
1D-24 Engine Mechanical: Valve Stem Runout Support the valve with V-blocks as shown, and check its runout with the dial gaugeThe valve must be replaced if the runout exceeds the limitSpecial tool0990020607 (Dial gauge (1100 mm, 10 mm))0990020701 (Magnetic stand)0990021304 (V-block (100 mm)) Valve stem runout (IN& EX Service limit: 0.05 mm (0.002 in) Valve Face Wear Visually inspect each valve face for wear or damageIf any abnormal wear is found, replace the respective valve with new oneMeasure the valve head thickness "T"If the valve head thickness is not within the specified value, replace the value with new oneSpecial tool0990020101 (Vernier calipers (115 mm, 150 mm)) Valve head thickness "T" Service limit: 0.5 mm (0.02 in)
I827H1140060-01 I827H1140062-01
Valve Head Radial Runout Place the dial gauge at right angles to the valve head face, and measure the valve head radial runoutIf it exceeds limit, replace the valveSpecial tool0990020607 (Dial gauge (1100 mm, 10 mm))0990020701 (Magnetic stand)0990021304 (V-block (100 mm)) Valve head radial runout (IN& EX Service limit: 0.03 mm (0.001 in)