2005 Polaris Sportsman 700/800 EFI Service Manual, Page 82Get this manual
VALVE SEALING TEST
1Clean and dry the combustion chamber area (A)Refer to Page 3.25 for cleaning tips2Pour small amount of clean solvent onto the intake port and check for leakage around each intake valveThe valve seats should hold fluid with no seepage3Repeat for exhaust valves by pouring fluid into exhaust portA