2016
100
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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