2004-2005 Honda TRX450R Factory Sevice Manual, Page 139Get this manual
CYLINDER HEADIVALVE
CYLINDER COMPRESSION
Warm he eng ine to normal operating te mperatu reStop the engine and rem ove he spark plug (page 4-
Install the compression ga uge into he spark plug holeShi ft the ran smission in neutral
Op en the throttle all the wa an operate the kickstarte forcefully severa times until the gauge
reading stops risingThe cylinder
COMPR ESSIO PRESSUR E:
comoressoo
specificat ion is comparatively low because the camshaft has decompress ion device installed -