Kawasaki STX-15F service manual Cylinder Head Warp

ENGINE TOP END 6-23

Cylinder Head

•Apply molybdenum disulfide oil solution [A] to both sides of the M11 cylinder head bolt washers [B] and the thread of head bolts [C].

•Install the cylinder head.

•First, tighten the M11 cylinder head bolts following the tightening sequence [1 ∼ 10].

Torque - Cylinder Head Bolts (M11): First: 23 N·m (2.3 kgf·m, 17 ft·lb) Final: 59 N·m (6.0 kgf·m, 44 ft·lb)

•Next, tighten the M7 cylinder head bolts following the tightening sequence [11 ∼ 12].

Torque - Cylinder Head Bolts (M7): 20 N·m (2.0 kgf·m, 14 ft·lb)

•Lastly, tighten the M6 cylinder head bolts following the tightening sequence [13 ∼ 14].

Torque - Cylinder Head Bolts (M6): 12 N·m (1.2 kgf·m, 104 in·lb)

•Apply grease to the O-ring [A].

•Install:O-ring

Upper Exhaust Side Camshaft Chain Guide Bolt [B]

•Tighten:

Torque - Exhaust Side Camshaft Chain Guide Bolt (Upper): 25 N·m (2.5 kgf·m, 18 ft·lb)

•Install the camshafts (see Camshaft Installation).

Cylinder Head Warp

•Remove the cylinder head (see Cylinder Head Removal).

•Clean the cylinder head.

•Lay a straightedge across the lower surface of the cylinder head at several positions.

•Measure the space between the straightedge [A] and the head with a thickness gauge [B].

Cylinder Head Warp

Standard: – – –

Service Limit: 0.05 mm (0.002 in.)

If the cylinder head is warped more than the service limit, replace it.

If the cylinder head is warped less than the service limit, repair the head by rubbing the lower surface on emery paper secured to a surface plate (first No. 200, then No. 400).