Omar Posted January 27, 2022 Share Posted January 27, 2022 I just bought a 2019 Yamaha tracer 900 with 780 miles on it at an online "AS IS" auction. I went to pick it up and had to jump the bike to start it. As soon as I took the jump cables off the bike, it died within 3 seconds. Had to jump it to start it again and same story, as soon as I take cables off it dies. The guy from the auction said that the battery was new and they had bought it 2 weeks ago and it looked new. While bike was running and I revved it, I noticed the headlight flickering which seemed odd. That tells me that there may be an electrical, generator, power distribution problem. Is it possible that the stator is bad? Seems very odd on a 3 year old bike with such low miles to have a stator go bad right? I hate to order a stator replace it and not fix the problem. Any things I can check to pinpoint the problem? There is not a Yamaha dealer close to me. Any insight guys? Any and all help is greatly appreciated. Thanks! Link to comment Share on other sites More sharing options...
HGP61 Posted January 27, 2022 Share Posted January 27, 2022 It's easy enough to test the output of the stator and battery with a voltmeter if the bike starts up I think it should be reading about 14 volts output and a fully charged battery should be about 12.7 volts, but I'm sure others on the forum with a lot more knowledge will be chipping in shortly with advice 2 Link to comment Share on other sites More sharing options...
pilninggas Posted January 27, 2022 Share Posted January 27, 2022 As above - it's more probable that the reg-rec is faulty or there is a bad earth. I'd check earths [grounds] and do the above voltage checks. Stators on motorcycles are run very differently to altenators on cars and do fail if other stuff malfunctions (they get shorted and burn out) - so the stator could be faulty. 1 Link to comment Share on other sites More sharing options...
Supporting Member roadrash83 Posted January 27, 2022 Supporting Member Share Posted January 27, 2022 Make sure the battery terminals are clean and tight. I kind of get the idea from his comment it looked new, that it might not be. 1 He who dies with the most toys wins. Link to comment Share on other sites More sharing options...
Supporting Member betoney Posted January 27, 2022 Supporting Member Share Posted January 27, 2022 Maybe our resident expert, @skipperT could chime in and offer a suggestion? 1 ***2015 Candy Red FJ-09*** Link to comment Share on other sites More sharing options...
skipperT Posted January 27, 2022 Share Posted January 27, 2022 (edited) First off, never trust a battery to be good that someone says “oh it’s been replaced”. What’s the battery voltage key-off measured across the battery terminals? Now switch on the ignition, wait 30 seconds and measure it again while the key is on/engine off. If this measurement is less than 12v, charge the battery and repeat the test. If it fails this key-on voltage test, replace the battery. And don’t buy some junk battery off Amazon please, either support someone local to you or ask here for further suggestions Second, you cannot test the charging system without a good battery. There are static tests that can be performed on the stator windings but let’s start with the basics before we get crazy and tear stuff apart. Report back with your results. -Skip Edited January 27, 2022 by skipperT 3 2 Link to comment Share on other sites More sharing options...
Omar Posted January 27, 2022 Author Share Posted January 27, 2022 Thank you all very much for all the solid advise. Ill start with the battery, terminals, connections, volts, etc. and report back. Thanks again! 1 Link to comment Share on other sites More sharing options...
Omar Posted February 17, 2022 Author Share Posted February 17, 2022 Good news guys, I went to the Yamaha dealer and bought an overpriced battery from them. Stuck it in the bike and its running with no issues at all! Looks like the previous battery that the dealer claimed was "New" had a bad cell or perhaps the wrong battery. Thank you all for all your input and insights! 1 1 Link to comment Share on other sites More sharing options...
Peddler Posted February 17, 2022 Share Posted February 17, 2022 I was told, when a stator went bad on a new outboard motor, that if a stator is going to go bad that it usually happens very early. Link to comment Share on other sites More sharing options...
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