will 2008 yfz450 run with battery disconnected

[go2glamis 1]

i have gone through two brand new battery in two rides it starts and runs great then with no warning it just dies. the battery wont charge after. it shorts out and I have to replace it. my question is should the bike run with the battery disconnected. I have a new battery in now and changed the rectifier and when I take the cable loose it dies. is this normal

[Frank Angerano 834]

Hey @go2glamis welcome to Quadcrazy. I would check your stator coil.   It could be over charging the system. Or not charging at all.   You need to see what voltage you have coming from the stator as well as do an ohms test on it.   The engine should run with the battery disconnected, the lights and accessories would not work properly and may shut the engine down if you were to turn them on due to a heavy draw but the engine should run with the battery disconnected. 

 

[go2glamis 1]

Thank you very much. Do you know where I would be able the find the procedure and specs to test that? 

[Frank Angerano 834]

Here a few pages from the manual. It’s not the same year but should be close enough if not the same.  

I would also start the bike up and put a tester on the battery and see how much voltage your getting at the battery.   As your checking rev the engine a little and see if it changes. Are you handy with an electrical tester ? 

 

 

[go2glamis 1]

Yes I actually tested it already It was staying at 12 to 12.5 then I changed the rectifier and now getting about 14 which is good but it stll dies when the the battery is disconnected so maybe the bike is running off the battery and not the stator

[Frank Angerano 834]

That Could be possable. Test the stator and see what you get and go from there.  Have you checked all the connections as well as your grounding from the battery to the frame? Was the regulator/rectifier an oem part or aftermarket? 

[go2glamis 1]

Everything on it is stock except the pipe and I put an oem rectifier back on. Not a big fan of aftermarket stuff. But I will also check all my conections

[Frank Angerano 834]

Ohm out tye stator and see if it’s in range 

[go2glamis 1]

Ok thanks for all the help I well add to this when I get get all your suggestions tried out and it's fixed

[Frank Angerano 834]

Definitely check all the connections and think about anything that could have happened like a smashed wire somehow, have you tried to jump start the bike with a car by chance ? That can cause problems internally with the rectifier and cdi as well as he stator. Over amperage kills that stuff easy.   

[go2glamis 1]

Not a car but a charging system and only after the first time I had this issue with a brand new battery that failed

Ok I checked stator and it's only reading 0.150 so will replace and give an update when I get it installed 

[Frank Angerano 834]

Ok so it’s below range. Could be that’s your problem.  Where are you going to get the parts ?

[go2glamis 1]

Should have the part end of week and installed in a week or two

[Frank Angerano 834]

Ok good luck.  Keep us posted.  

Gaskets don’t forget gaskets.  

[JacobSlabach 116]

wont it hurt the electrical on a bike to run it without the battery hooked up?  Thats what I've heard...

[Frank Angerano 834]

No.   

[JacobSlabach 116]

ok.  rumors are wrong then🤣

[go2glamis 1]

Just an update

I ordered an aftermarket stater cause it was cheaper (stupid me) I don't have good luck with aftermarket parts and it did not work so returning it and getting the stock one 

[Frank Angerano 834]

What brand did you get just curios. Reason I’m asking is I’ve ised one aftermarket brand and it worked great.  

[go2glamis 1]

QA brand from rocky Mountain they had the Ricky stator but I don't need the 100 watt and it was more then stock