2006-2009 Suzuki LT-R450 Service Manual, Page 45Get this manual
PERIODIC MAINTENANCE
COMPRESSION PRESSURE CHECK
The compression pressure reading of cylinder is good indicator of its internal conditionThe decision to overhaul the cylinder is often based on the results of compression testPeriodic maintenance records kept at your dealership should include compression readings for each maintenance seNice
Compression pressure: Standard: 800 kPa (8.0 kgfcm114 psi) (Automatic decompression actuated) Low compression pressure can indicate any of the following conditions:Excessively worn cylinder wallsWorn piston or piston ringsPiston rings stuck in groovesPoor valve seatingRuptured or otherwise defective cylinder head gasket
NOTE: When the compression pressure goes below specification, check the engine for conditions listed above