Husqvarna 401 Vitpilen - Owner's Manual > Checking the rear hub rubber dampers

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The engine power is transmitted from the rear sprocket to the rear wheel via 6 rubber dampers. They eventually wear out during operation. If the rubber dampers are not changed in time, the rear sprocket carrier and the rear hub will be damaged.

Preparatory work

• Raise the motorcycle with the rear lifting gear.
• Remove the rear wheel.

Main work

• Check bearing 1.

If the bearing is damaged or worn:

• Change the bearing.

• Check the rubber dampers 2 of the rear hub for damage and wear.

If the rubber dampers of the rear hub are damaged or worn:

• Change all rubber dampers in the rear hub.

• Lay the read wheel on a workbench with the rear sprocket facing upwards and insert the wheel spindle in the hub.
• To check the play A, hold the rear wheel tight and try to rotate the rear sprocket.

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Measure the play on the outside of the rear sprocket.

If play A is larger than the specified value:

• Change all rubber dampers in the rear hub.

Finishing work

• Install the rear wheel.
• Remove the rear of the motorcycle from the lifting gear.

Checking the tire condition

Warning

Danger of accidents If a tire bursts while riding, the vehicle becomes uncontrollable.

• Ensure that damaged or worn tires are replaced immediately. (Your authorized Husqvarna Motorcycles workshop will be glad to help.)

Danger of crashing Different tire tread patterns on the front and rear wheel impair the handling characteristic.

Different tire tread patterns can make the vehicle significantly more difficult to control.

• Make sure that only tires with a similar tire tread pattern are fitted to the front and rear wheel.

Danger of accidents Non-approved or non-recommended tires and wheels impact the handling characteristic.

• Only use tires/wheels approved by Husqvarna Motorcycles with the corresponding speed index.

Danger of accidents New tires have reduced road grip.

The contact surface on new tires is not yet roughened.

• Run in new tires with moderate riding at alternating angles.

  Running-in phase 200 km (124 mi)

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The type, condition, and air pressure of the tires all have a major impact on the handling of the motorcycle.

Worn tires have a negative effect on handling characteristics, especially on wet surfaces.

• Check the front and rear tires for cuts, run-in objects, and other damage.

If the tires have cuts, run-in objects, or other damage:

• Change the tires.

• Check the tread depth.

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Observe the minimum profile depth required by national law.

If the tread depth is less than the minimum tread depth:

• Change the tires.

• Check the tire age.

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The tire date of manufacture is usually contained in the tire label and is indicated by the last four digits of the DOT number. The first two digits indicate the week of manufacture and the last two digits the year of manufacture.

Husqvarna Motorcycles recommends that the tires be changed after 5 years at the latest, regardless of the actual state of wear.

If the tires are more than 5 years old:

• Change the tires.

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