adip1963 Posted October 17, 2010 Share Posted October 17, 2010 hi could anyone tell me why my batterie goes flat when bike is running Link to comment Share on other sites More sharing options...
Moderator drewpy Posted October 17, 2010 Moderator Share Posted October 17, 2010 someone ran over it Link to comment Share on other sites More sharing options...
chris66 Posted October 17, 2010 Share Posted October 17, 2010 rectifier regulator or wiring going to it, put a voltage tester on the battery with it reving about 4000 revs, it should read 13 to 14 volts. if its still 12 volts then check the wireing to the reg/rec. chris Link to comment Share on other sites More sharing options...
adip1963 Posted October 18, 2010 Author Share Posted October 18, 2010 rectifier regulator or wiring going to it, put a voltage tester on the battery with it reving about 4000 revs, it should read 13 to 14 volts. if its still 12 volts then check the wireing to the reg/rec. chris chris have checked wires from alternator and thay all seam to go to earth did a conti test on wires Link to comment Share on other sites More sharing options...
2 Wheels Posted October 18, 2010 Share Posted October 18, 2010 As Chris66 was saying ! Turn on the ignition Put a voltmeter on the plus and minus on the battery,,,,,,,,,,,battery fully charged. It should read 12volts Now start the bike and reve it up to arround 4000 rpm and hold it there, the battery now should read 13 to 14 volts. If it doesnt then your bike isnt charging the battery shile its running. Check the regulator / rectifier,,,,,,,,it sounds like its fried. Link to comment Share on other sites More sharing options...
wild foamy Posted October 18, 2010 Share Posted October 18, 2010 Reg/Rec or alternator, check the windings to the alternator and makes sure they are putting out an AC voltage, should be around 60v@5000rpm, if they are all good then its your reg/rec Link to comment Share on other sites More sharing options...
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