The rear suspension pivot pins of the R26, R27 and R50 – R69S models can be adjusted with the use of the Matra 513 tool. However, no replicas are made of the Matra 513 tool.
The alternative is a pin wrench such as PN 31421234399.W (Pin wrench for front fork cap screw R69US, R50/5 – R100) Although the diameter of the pins is just under 4 mm and the holes in the pivot pins are 5 mm, this tool functions well.
The alternative is pin wrench 31422000243.W (Pin wrench for front fork cap screw R25/3): the pins have a diameter of just under 5 mm. However, some material on the inside of the wrench arms needs to be grinded away to bring the 2 pins closer together so they will fit the swing arm pivot pins
