Service manual

Page 53 of 151

• Install the Air Injection system pipe. (4 bolts)

• Install the inlet pipe onto the cylinder

• Install and tighten the spark plug

Torque value: 7-14 lbf-ft

This model is equipped with a special precision 4-valve

mechanism so its tightened torque can not exceed

the standard value in order to avoid causing cylinder

head deformation, engine noise, and leaking that affect

the vehicle’s performance.

• Install the engine onto the frame (see chapter 5).

6-10 Valve Clearance Adjustment

• Loosen the two Air Injection system pipe upper side

bolts.

• Remove the cylinder head cover.

• Remove the cylinder head side cover.

• Remove the left crankcase cover.

• Turn the drive face, and align the timing mark on the

cam sprocket with that of the cylinder head with the

piston at the TDC position.

• Loosen the valve clearance adjustment nuts and

bolts located on the valve rocker arm.

• Measure and adjust valve clearance with a feeler

gauge.

• After valve clearance had been adjusted to standard

value, hold the adjustment bolt and tighten the

adjustment nut.

Standard Value: IN 0.10 ± 0.02 mm

EX 0.15 ± 0.02 mm

• Install the cylinder head side cover.

• Start the engine and make sure that engine oil flows

onto the cylinder head.

• Stop the engine after confirming.

• Install the cylinder head cover and AI pipe.

• If lubricant does not flow to the cylinder head, engine

components will be seriously damaged.

• When checking lubricant flowing condition, run the

engine in idle speed. Do not accelerate the engine.

Spark plug