Honda XR250 Tornado 2016 Owner's Manual page 167

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4. Roll the motorcycle forward. Stop and place
it on its side stand. Inspect the drive chain and
sprockets for any of the following conditions:
DRIVE CHAIN
* Damaged Rollers
* Loose Pins
* Dry or Rusted Links
* Kinked or Binding Links
* Excessive Wear
* Improper Adjustment
* Damaged or Missing O-rings
SPROCKETS
* Excessively Worn Teeth
* Broken or Damaged Teeth
A drive chain with damaged rollers, loose pins,
or missing O-rings must be replaced. A chain
which appears dry, or shows signs of rust, requires
supplementary lubrication. Kinked or binding links
should be thoroughly lubricated and worked free.
If links cannot be freed, the chain must be replaced.
Damaged sprocket teeth
Replace
Normal sprocket teeth
XR250 TORNADO
Worn sprocket teeth
Replace
GOOD