Question about 1990 Suzuki VX 800
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Posted on Jan 02, 2017
Hi ...... Find where the battery is, under the seat or behind a side panel. Disconnect the black (negative lead usually with a 10mm spanner then disconect the red (positive) lead. The battery will be held in place with a 'rubber' strap or a bracket and depending on type of battery there may be a vent hose from the battery to the lower half of the bike, this just pulls off and remains in place until you replace the battery. Installation is reverse except you connect red (positive) first.
Let us know how you get on.
Posted on Jan 20, 2009
SOURCE: my battery wont keep a charge
did you check the rectifier circuit? thats the only thing left in the charging system circuit....you can check this buy using a voltmeter, first gain access to battery.... ground the black meter lead to a good frame ground (make sure bare metal surface, not painted), and touch the red lead to the positive terminal on the battery..with the engine at idle, you'll probably see about 12.5v or >...now increase to 4000rpm and watch to see the voltage rise to approx. 13.5v to 14v and then while holding it at this rpm you should see the voltage being rectified down to about 13v, release throttle now, this is normal operation rectifier is working. If the battery still wont hold a charge then the negative battery cable is probably shorting out on the frame somewhere and draining the battery. You can try to see if this is shorting out by driving the bike around (if you can), for at least 15 minutes above 4000rpm then take a voltage reading real quick... it'll probably be around 12.6 or> ..13v is excellent. now disconnect the negative cable.. tie it off so it wont touch anything, and leave over night next day it should still read about 12.6v. Hope you find the trouble. Can you let me know if this helped you a lot.
Posted on Apr 05, 2010
to determine that, you will need a voltmeter and a battery charger. first, put battery on level surface and check to see if the acid is at a good level, if not, you will have to get some at a parts store and refill it to level indicated on the side. fully charge the battery over night with the charger taking the battery out first. the next day, disconnect charger and write down voltage obtained from voltmeter. next, install battery on motorcycle and try to start it. if it's starts, use voltmeter to check voltage at battery while running engine, write it down. let it run a few minutes like 20 and shut it off. check voltage, if it droped, your alternator is not charging. if it's the same as when you first tested it at 12 volts, you might be good only if you had to refill it, if not, the battery is defective and must be replaced.
Posted on Jul 06, 2010
Tips for a great answer:
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Use a multimeter to check the charging current and also discharging rate when the engine is switched off.
The alternator and accessories must be checked.
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