2009 Suzuki 400 LTZ Quad Sport Service Manual, Page 174Get this manual
Engine Mechanical: Install the valve spring seat Apply engine oil to the oil seal (5), and press-fit it into position 1D-32
CAUTION
Put on the valve spring retainer (6), and using the special tools, press down the spring, fit the cotter halves (7) to the stem end, and release the lifter to allow the cotter halves (7) to wedge in between retainer and stem!
Do not reuse the removed oil seal
CAUTION
Be sure to restore each spring and valve to their original positions Be careful not to damage the valve and valve stem when handling them To prevent damage of the tappet sliding surface with the special tool, use the sleeve protectorSpecial tool (A): 0991614510 (Valve spring compressor) (B): 0991614910 (Valve spring compressor attachment)0991684511 (Tweezers)0991928610 (Sleeve protector)(B)