NSR 150 SP Owner's Manual: Drive Chain

DRIVE CHAIN

(Refer to the maintenance precaution)

The service life of the drive chain is dependent upon proper lubrication and adjustment. Poor maintenance can cause premature wear or damage to the drive chain and sprockets. The drive chain should be checked and lubricated as part of the Pre-ride Inspection. Under severe usage, or when the motorcycle is ridden in unusually dusty or muddy areas, more frequent maintenance will be necessary.

Inspection:

1.    Turn the engine off, place the motorcycle on its side stand and shift the transmission into neutral.

2.    Check slack in the lower drive chain run midway between the sprockets. Drive chain slack should be adjusted to allow the following vertical movement by hand: 30-40 mm (1 .2-1 .6 in)

3.    Roll the motorcycle forward. Stop. Check drive chain slack. Repeat this procedure several times. Drive chain slack should remain constant. If the chain is slack only in certain sections, some links are kinked and binding. Binding and kinking can frequently be eliminated by lubrication.

4.    Roll the motorcycle forward. Stop and place it on its side stand. Inspect the drive chain and sprockets for any of the following conditions:

DRIVE CHAIN

• Damaged Rollers
• Loose Pins
• Dry or Rusted Links
• Kinked or Binding Links
• Excessive Wear
• Improper Adjustment
• Missing O-rings

SPROCKETS

• Excessively Worn Teeth
• Broken or Damaged Teeth

A drive chain with damaged rollers, loose pins, or missing O-rings must be replaced. A chain which appears dry, or shows signs of rust, requires supplementary lubrication. Kinked or

binding links should be thoroughly lubricated and worked free. If links cannot be freed, the chain must be replaced.

Adjustment:

Drive chain slack should be checked and adjusted, if necessary, every 1,000 km (600 miles). When operated at sustained high speeds or under conditions of frequent rapid acceleration, the chain may require more frequent adjustment. If the drive chain requires adjustment, the

procedure is as follows:

1.    Turn the engine off, place the motorcycle on its side stand and shift the transmission into neutral.

2.    Loosen the bearing holder pinch bolt (1).

3.    Turn the bearing holder (2) clockwise or counterclockwise to obtain the proper chain slack with the pin spanner (3).

4.    Torque the bearing holder pinch bolt to: 73 N.m (7.4 kgf.m, 54 Ibf.ft)

5.    Recheck chain slack.

WARNING

If a torque wrench was not used for installation, see your authorized Honda dealer as soon as possible to verify proper assembly.

CAUTION:

Damage to the bottom part of the frame may be caused by excessive drive chain slack of more than: 50 mm (2.0 in)

Wear inspection:

Check the chain wear label when adjusting the chain. If the red zone (4) on the label

aligns with the index mark (5) after the chain has been adjusted to the proper slack, the chain is excessively worn and must be replaced. The proper slack is : 30-40 mm (1.2-1.6 in)

Lubrication and cleaning:

Lubricate every 1,000 km (600 miles) or sooner if chain appears dry. The O-rings in this chain can be damaged by steam cleaning, high pressure washers, and certain solvents. Clean the side surfaces of the chain with a dry cloth. Do not brush the rubber O-rings. Brushing will damage them. Wipe dry and lubricate only with SAE 80 or 90 gear oil. Commercial chain lubricants may contain solvents which could damage the rubber O-rings.

CAUTION:

The drive chain on this motorcycle is equipped with small O-rings between the link plates. These O-rings retain grease inside the chain to improve its serv.ice life. However, special precautions must be taken when adjusting, lubricating, washing, and replacing the chain.