Yamaha's line-up of motorcycles ranges from cruisers to sports cycles to dirt bikes. But beyond these cycles, Yamaha also has a line of laid-back and fuel-efficient scooters suitable for any rider who doesn't need to reach her destination in a hurry. For the 2011 model year, the company offered five different scooters on its website. Despite differences in engineering and design across makes, models and years, most minor repair instructions remain consistent for all Yamaha scooters, as listed in the owner's manual for each.
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Things you need
- Wire bristle brush
- Separately powered battery charger
- Dielectric grease or petroleum jelly
- Spark plug wrench
- Spark plug gap tool
- Spark plugs
- Oil pan
- Engine oil
Turn off the scooter's engine before attempting to replace a fuse.
Use a standard wrench to unscrew and remove the seat.
Remove the main fuse, located next to the battery compartment.
Connect the fuse to a multimeter to test whether the fuse has blown. If it does not read 0 ohms, it has blown. Replace it with a fuse of the same amperage as listed in the "Maintenance" section of the specific Yamaha scooter's manual.
Install the new fuse and replace the scooter's seat.
Check the battery if the starter motor is not working or if the engine turns over slowly.
Remove the scooter's seat to access the battery and case.
Undo the battery's holding straps. Disconnect the negative (-) battery cable first, followed by the positive (+) one.
Inspect the battery terminals. Use a wire bristle brush and solvent to scrape away any corrosion that may have formed.
Replace the battery -- with one of the same voltage -- if the original is cracked or damaged or if the terminals are corroded beyond repair.
Fully charge the battery with a separate battery charger.
Wipe a thin layer of dielectric grease or petroleum jelly over the battery terminals to avoid further corrosion.
Return the battery to the case. Connect the positive (+) cable first, followed by the negative (-) cable. Secure the battery and reinstall the scooter's seat.
Inspect the spark plug, located inside the engine's cylinder underneath the panel facing the scooter's footrest.
Remove the spark plug cap. Using a spark plug wrench, twist the plug counterclockwise and gently remove it from the cylinder.
Inspect the condition of the electrode end of the spark plug. Replace the plug if it is cracked, burnt or brittle. Spark plug types vary according to scooter model and year, so consult the "Maintenance" section of the particular scooter's manual to find the right kind of plug.
Set the spark plug gap to the width specified in the owner's manual. To widen this gap, use a spark plug gap tool to gently pull the hook larger. Press the hook-end of the plug against a hard, flat surface to shorten this gap.
Reinstall the spark plug and front panel.
Start the scooter's engine and let it warm up the oil for a few minutes.
Park the scooter on level ground.
Turn off the engine.
Place an oil pan underneath the scooter's engine to collect old oil.
Remove the engine oil filler cap, located at the top of the oil tank.
Use a wrench to undo and remove the oil drain bolt at the bottom of the tank. Allow the oil to drain fully into the oil pan.
Install the engine drain bolt and tighten it to the torque specified in that scooter's manual.
Pour the recommended engine oil into the oil filler tube. Recommended oil type and amount is also located in the particular scooter's manual in the "Maintenance" section.
Screw the oil filler cap in place.
Tips and warnings
- For major repairs, Yamaha strongly recommends consulting a certified dealer.
- Battery fumes can ignite, so do not smoke or work near an open flame while handling the scooter's battery.
- Use only the parts and engine oil listed in a particular scooter's owner's manual. Otherwise, serious engine damage can result.
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