Suspension - Jotagas JTG 125cc 2017 Handbuch

Correct tension of the chain should allow a play of
approximately 10-15 mm in the area between the frame
and the tensioner.
To tension the chain, first loosen the rear wheel axle nut
and then adjust the chain using the tensioner adjustment
bolts, which are in the swing arm. When adjusted, retighten
the rear axle nut, paying special attention to the alignment
of the chain, ensuring that it is not twisted.
Take care with this adjustment. A misaligned rear
wheel axle or with the nut loose could cause an
accident.
Keep the chain lubricated for optimum service life,
preferably using viscous oil, for longer life.
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SUSPENSION

The front fork can be adjusted with the bolts at the top of
the fork. Turning the bolt on the left-hand fork tube you
can adjust the compression and it you turn the bolt on the
right-hand tube you adjust the extension. Choose the best
option according to your needs, always bearing in mind that
the left and right-hand cylinders must be adjusted to the
same level and perfectly aligned.