CHAIN DRIVE

Removing the drive chain

Order

Job/Parts to remove

Q’ty

Remarks

1

Drive chain

1

 

2

Drive sprocket cover

1

 

3

Drive sprocket nut

1

 

4

Lock washer

1

 

5

Drive sprocket

1

 

REMOVING THE DRIVE CHAIN

1.Stand the vehicle on a level surface.

Securely support the vehicle so that there is no danger of it falling over.

2.Remove:

  • Master link clip

  • Master link “1”

  • Master link plate “2”

  • Drive chain “3”

CHECKING THE DRIVE CHAIN

1.Measure:

  • 15-link section of the drive chain

    Out of specification → Replace the drive chain.

  • 15-link length limit

    242.9 mm (9.56 in)

a.Measure the length “a” between the inner sides of the pins and the length “b” between the outer sides of the pins on a 15-link section of the drive chain as shown in the illustration.

b.Calculate the length “c” of the 15-link section of the drive chain using the following formula.

Drive chain 15-link section length “c” = (length “a” between pin inner sides + length “b” between pin outer sides)/2

  • When measuring a 15-link section of the drive chain, make sure that the drive chain is taut.

  • Perform this procedure 2–3 times, at a different location each time.

2.Check:

  • Drive chain

    Stiffness → Clean, lubricate, or replace.

3.Clean:

  • Drive chain

a.Wipe the drive chain with a clean cloth.

b.Put the drive chain in kerosene and remove any remaining dirt.

c.Remove the drive chain from the kerosene and completely dry it.

4.Check:

  • Drive chain roller “1”

    Damage/wear → Replace the drive chain.

  • Drive chain side plate “2”

    Damage/wear → Replace the drive chain.

5.Lubricate:

  • Drive chain

CHECKING THE DRIVE SPROCKET

1.Check:

  • Drive sprocket

    More than 1/4 tooth wear “a”→ Replace the drive sprocket and the rear wheel sprocket as a set.

    Bent tooth → Replace the drive sprocket and the rear wheel sprocket as a set.

b.

Correct

1.

Drive chain roller

2.

Drive sprocket

CHECKING THE REAR WHEEL SPROCKET

Refer to CHECKING AND REPLACING THE REAR WHEEL SPROCKET.

INSTALLING THE DRIVE CHAIN

1.Install:

  • Master link “1”

  • Master link plate “2”

  • Master link clip “3”

When installing the joint clip, always keep the direction as shown in the figure.

2.Lubricate:

  • Drive chain

3.Install:

  • Drive sprocket

  • Lock washer

  • Drive sprocket nut

  • Drive sprocket nut

    90 N·m (9.0 kgf·m, 66 lb·ft)

    LOCTITE®

Never install a new drive chain onto worn drive chain sprockets; this will dramatically shorten the drive chain’s life.

After the drive sprocket nut has been tightened to specification, firmly bend the lock washer tabs “a” along the flat of the drive sprocket nut.

4.Adjust:

  • Drive chain slack (Maintenance Stand)

    50.0–60.0 mm (1.97–2.36 in)

A drive chain that is too tight will overload the engine and other vital parts, and one that is too loose can skip and damage the swingarm or cause an accident. Therefore, keep the drive chain slack within the specified limits.