How do you charge the battery on a '93 Yamaha Seca motorcycle?

  • Thread starter Thread starter Kryle Busch
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Kryle Busch

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My friend just bought a Seca and the battery died on him today while he was riding it. Neither of us know much about bikes. Another friend of ours said it didn't have an alternator and it would have to be charged by a quick charger, which seems like it would be a hastle. Do these bikes have an alternator? If not how do you charge them?
 
The guy who told you the bike has no alternator is an ignorant. Keep him away from your friend's bike.The bike DOES have an alternator. It is housed behind the engine and above the gearbox in a cylindrical housing accessible on the left side of the bike. This housing has a cover with the word "Yamaha" embossed on it and is held on by 3 hex-head screws.

UNDER NO CIRCUMSTANCE should you quick charge a motorcycle battery. Motorcycle batteries are charged overnight on a trickle charger at 1-2amps max.

The 93 Seca uses a sealed battery, so you can forget everything you've been told about getting distilled water.

To remove the battery, remove the seat (it comes off with the ignition key), undo the two terminal cables, detach the breather tube, and lift the battery out. If this whole operation takes you more than 5 minutes, you really are incompetent.

Now put it on a trickle charger overnight. You can buy a cheap one at Wal-Mart but make sure it is a fully automatic model.

If the bike does not charge the battery while riding, the probable culprit is worn alternator brushes. You can access them by removing the alternator cover I described above. inside you will find 3 brush carriers. The alternator brushes are screwed on to these carriers. Replacements are inexpensive and easily installed.
 
First remove the battery from the bike. Remove the seat and you should be able to locate the battery. Unscrew the positive lead wire, then the negative one prior to removal of the battery.
The battery is filled with electrolyte, and this electrolyte must be replenished. This is done by buying Distilled Water at Walmart.... Remove the caps on top of the battery, being careful not to splash any of the acid on you. Get a syringe or a bendable cup that will allow you to replace the lost electrolyte with Distilled Water.

Fill each chamber of the battery with distilled water up to the fill line. Be careful not to overfill. If you do, remove some fluid with a bulb syringe..again, careful not to spill any on you..that's battery acid!!

Get a trickle charger or a regular battery charger, they sell them at Wal Mart and they have different amperage/voltage settings on them. Hook the battery up to the charger and wait for the battery to charge. It takes hours in some cases, depending on the condition of your battery. You will know it's charged because the electrolyte will be bubbling when it's charged.

If you see/hear bubbles in the chambers, remove the charger and don't let the pos and neg ends touch. A spark could cause an explosion of the gases given off during the charging process.

Replace the caps or covers to the cells, put the battery back on, and fire the bike up.
 
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