from honda shop manual (trx450 s/es 98-01):
inspect/adjust valve clearance while engine is cold.
remove fuel tank & heat guard. remove the bolts, cylinder head cover, gasket & o-ring. remove spark plug. removing timing hole cap from right side of the rear crankcase cover.
turn crankshaft clockwise using recoil starter, align the "T" mark on the flywheel with the index mark on the rear crankcase cover. make sure the piston is at TDC on the compression stroke. if not, rotate the crankshaft 360 degrees (1 full turn) and align the "T" mark withthe index mark.
inspect the intake and exhaust valve clearances by inserting a feeler gauge between the adjusting screw and valve stem.
VALVE CLEARANCE: IN/EX: 0.15mm (0.006 in.)
adjust if necessary by loosening the lock nut and turning the adjusting screw until there is a slight drag on the feeler gauge. hold the adjusting screw & tighten the lock nut.
TORQUE: 17 Nm (1.7 kgf m , 12 lb ft)
recheck valve clearance. inspect the conditionof the cylinder head cover gasket & o-ring, replace if necessary. install cylinder head cover & tighten bolts. check that the o-ring is in good condition, and install the timing hole cap.
TORQUE: 10 Nm (1.0 kgf m , 7 lb ft)
install the removed parts in the reverse order of removal.
ride to my house & complete above mentioned steps on my foreman!
inspect/adjust valve clearance while engine is cold.
remove fuel tank & heat guard. remove the bolts, cylinder head cover, gasket & o-ring. remove spark plug. removing timing hole cap from right side of the rear crankcase cover.
turn crankshaft clockwise using recoil starter, align the "T" mark on the flywheel with the index mark on the rear crankcase cover. make sure the piston is at TDC on the compression stroke. if not, rotate the crankshaft 360 degrees (1 full turn) and align the "T" mark withthe index mark.
inspect the intake and exhaust valve clearances by inserting a feeler gauge between the adjusting screw and valve stem.
VALVE CLEARANCE: IN/EX: 0.15mm (0.006 in.)
adjust if necessary by loosening the lock nut and turning the adjusting screw until there is a slight drag on the feeler gauge. hold the adjusting screw & tighten the lock nut.
TORQUE: 17 Nm (1.7 kgf m , 12 lb ft)
recheck valve clearance. inspect the conditionof the cylinder head cover gasket & o-ring, replace if necessary. install cylinder head cover & tighten bolts. check that the o-ring is in good condition, and install the timing hole cap.
TORQUE: 10 Nm (1.0 kgf m , 7 lb ft)
install the removed parts in the reverse order of removal.
ride to my house & complete above mentioned steps on my foreman!
