2006-2012 Honda TRX90 TRX90EX/X Service Manual, Page 42Get this manual
MAINTENANCE Check the intake and exhaust valve clearances by inserting the feeler gauge between the adjusting screw and valve stem VALVE CLEARANCE: IN: 0.05 mm (0.002 in) EX: 0.05 mm (0.002 in)
Adjust the valve clearance by loosening the lock nut and turning the adjusting screw until there is slight drag on the feeler gaugeHold the adjusting screw and tighten the lock nutTORQUE: 10 (1.0 kgfm, 1Ibf.ft)
After tightening the lock nutrecheck the valve clearance
Coat new -rings ith engine oil and Install them into the adjusting hole cap groovesApply engine oil to the adjusting ho le cap threadsInstall the adjusting hole caps and tighten them TORQUE: 12 N'm (1.2 kgfm, Ibfft )