Michel Steins,F.N. Oldtimer motorcycles: 1902-1965.
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Here are the picture from the conversion to a good working clutch, it is given me by 2 enthousiasts Dutch mens owners of a M 70.

First a pict from the old 13 metal plate clutch.

Now we start to open the clutch and rebuild it with Horex or BSA

clutch plates you needed only 2 plates easy to find on jumbles.

When we rebuild the clutch i've made a specail tool to compress the springs of the FN M 70 clutch

 Now we start to rebuild : always an inside plate/Horex/inside plate/Horex/

inside and to give the presure one or two outside plate like you needed to run.

1°     2° 3° 4° 5° 6° 7° 8°

end of the conversion

Out side clutch plate   inside plate

Working with the special clutch tool some pictures:   

Enjoy you're now good working clutch.

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