Question about 1982 Yamaha XZ 550

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I have a Yamaha XT 550 and it was running strong so i took it out and as soon as i hit a bump it died and wouldn't fire, the coil is fine and the wiring also seems fine what should i check next?

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If it died over a bump, the problem is almost certainly electrical. Check that all the fuses are firmly in place in the fusebox (while you're in there, clean off any corrosion you notice). Have a careful look at the cable that grounds the battery to the frame-- take the bolt off, clean off corrosion (steel wool or fine sandpaper). Try shorting out the contacts from the ignition lock -- maybe one of those wries snapped or came adrift. If it starts or the lights come on, there's your problem. Does this model have a killswitch that could have been bunmped to the "off" position?

Posted on Jun 04, 2009

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1982 Yamaha XT 550 no spark??


Hi, Anonymous and the usual suspects are:
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2. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
3. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
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