2004-2006 (2007) Honda TRX400FA Fourtrax Rancher / TRX400FGA Rancher AT GPScape Service Manual, Page 160Get this manual

2004-2006 (2007) Honda TRX400FA Fourtrax Rancher / TRX400FGA Rancher AT GPScape Service Manual, Page 160

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CYLINDER HEADVALVECAMSHAFT
COMPRESSION PRESSURE: 736 kPa (7.5 kgfcm2, 107 psi) at 450 rpm
Check that there is no leakage at the gauge connectionLow compression can be caused by:blown cylin