Baja Motorsports WD400-U Operator's Manual - Manual (Page 70)

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SPARK ARRESTER CLEANING
Periodically the spark arrestor will need cleaning
1. Select a well ventilated area and make sure the exhaust pipe is cool
2. Remove the drain bolt
3. Start the engine, block the end of the exhaust pipe with a dowel, this will
increase the speed of the engine because of back pressure.
4. Stop the engine and let the exhaust pipe cool.
5. Install the drain bolt back into the exhaust pipe and tighten
WARNING
Failing to maintain the brake shoes or pads could be hazardous.
Riding with worn brake shoes, pads, or shoes that are seriously worn,
will increase your chance of having an accident.
If you need to replace brake shoe pads, have your authorized service
center do the work. Inspecting and maintaining the brake shoe pads is
recommended. Replace the shoe pads in sets.
Drain bolt