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DRIVE CHAIN
Drive Chain Inspection
It is imperative that the drive chain is checked according to the maintenance procedures shown herein before
and after riding. This method will prolong the life of the chain of your Mini-Motorbike and avoid damage to
the sprockets and to other parts near the chain.
YCF recommend applying a uniform film of the MINERVA OIL
LUB’ CHAINE spray over the whole length of the drive chain.
Visual Inspection
1. Place the Mini-Motorbike on its side or centre stand.
2. Due to uneven tread wear the rear wheel must be turned so that
the chain pulls taut at the tightest part of the crank’s rotation.
Then measure the chain slack by pulling the chain up (half-way
between the front and rear sprockets).
3. Slack is determined by the vertical movement on the bottom part
of the chain. Proper slack must be 3.8 cm (1.5 inches) with the
slack measured out of the bottom run of the chain to the top of
the swingarm with no tension on the wheel. Measure from the
lower chain guard (rearmost point on the rear sprocket).
Warning
Never repair the drive chain of your Mini-Motorbike while the engine is running, as it may cause serious
injury or even death. Before checking the drive chain, make sure the engine is turned off.
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