APRILIA RX 50 RACING - 2003 Manual page 59

CHAIN ADJUSTMENT (Fig. 60)
Stand the vehicle in an upright position and com-
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pletely extend the rear suspension.
Check that the vertical movement in the lower part
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of the chain, at a point mid-way between the pin-
ion and the crown, is about 30-35 mm.
If this distance is not correct, proceed as follows:
Loosen the rear wheel pin fastening nut.
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For the wheel centering:
Make sure that on both sides the fixed
reference on the rear fork corresponds
to the number indicated on the chain tightener.
Act on the apposite chain tighteners.
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Once the operation has been performed, tighten
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the rear wheel pin fastening nut.
30 - 35
Fig. 60
59