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Shock Absorber Data

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Shock Absorber Cutaway (20K)

Key to Shock Absorber Cutaway

  1. Supporting ring halves
  2. N/A
  3. Stop rubbers
  4. Threaded seal ring - AC 10x19x7
    Special Tool No. 05-MW 82-4
  5. Piston with non return valve (top) and damping valve (bottom)
  6. Bottom valve supporting ring
  7. Tolerance group marking
  8. Protective sleeve
  9. Compression spring
  10. Piston tube
  11. Adjusting arm

Dismantling the Shock Absorbers

Clamp the lower eye of the suspension unit in a vice.

Press down the protective sleeve (8) and take out the two supporting ring halves (1).

Now the parts (8), (9) and (11) can be removed.

Unscrew the threaded sealing ring (4) using the special tool or a suitable peg spanner and remove damping rod/valves.

All parts must be thoroughly cleaned before reassembly,

Refill with shock absorber oil (ATF).

ATF = Automatic Transmission Fluid.

Shock Absorber Markings

Marking is arranged above lower eye

A22 Model No.
100 Rated stroke in mm.
88 Damping force (rebound)
8 Damping force (compression)
M With adjustment
1.50/1 Manufacturers No.

Tolerance Markings

Coloured dot on upper face of piston rod (7)

None or Yellow +ve deviation from rated value
Green -ve deviation from rated value

Spring Ratings

Description Unit Solo Sidecar
Relaxed length mm 260 + 8 260 + 8
External diameter of spring mm 55 -0.8 52 +0.8
Wire diameter mm 7 7
Number of turns 16.5 17.5
Spring constant N/mm 15.23 17.304
Spring marking None White

Shock Absorber Oil Capacities

Use Automatic Transmission Fluid

125/150 Models 70 - 75cc
250 Models 75 - 85cc

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