FRAME SERVICE

Refer to Figures 1A and 1B, pp. 114-117.
1. If a frame is badly bent, service is best left to a dealer who has proper straightening equipment.

2. Some earlier Stiletto models had a tendency to crack frames at the spot indicated in Figure 2. Check this often and inspect the entire frame if unusual vibration shows up suddenly.
 

SWINGING ARM SERVICE

Refer to Figures 1 A and 1B, pp. 114-117.

1. Two types of swinging arm mountings have been used on the Ossa.  Refer to Figure 3. The older type is shown at the bottom of the picture.

2. Check the swinging arm for lateral movement as shown in Figure 4. If the bolts are tight and there is movement, the bushings may have to be replaced.

3. With the older type through-bolt, remove the nut and drive the bolt out.  Replace the bushings and check again for lateral movement.  If looseness persists, thin shims can be inserted between the swinging arm and the frame until a smooth working assembly is obtained.  Any looseness in the swinging arm pivot will be felt as vibration throughout the entire motorcycle at all speeds (see Figure 5).

4. The newer mounting method uses short bolts which screw into the swinging arm pivot bolt.  Remove the bolts, drive out the pivot bolt and inspect the bushings for wear.  These nylon bushings rarely wear out.

5. If your motorcycle is raced, a recommended practice is to safety wire the swinging arm bolts to small holes drilled through the adjacent frame gusset to prevent their working loose.
 

REAR SUSPENSION SERVICE

1. Support the motorcycle under the engine so there is no pressure on the shocks.  This will ease shock removal.

2. Loosen and remove the nuts and bolts securing the shocks to the frame at the top and the swinging arm at the bottom.

3. Betor shocks are used to illustrate the following shock disassembly but the instructions apply to both Betor and Telesco units.

4. Begin shock disassembly by mounting the shock in a strong vise as shown in Figure 6.

5. Pull against spring pressure as shown to move the shock cover down and enable a 17 mm wrench to be inserted between the cover and the top shock mount.  Loosen the nut which locks the top mount on the shock absorber shaft.