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The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> Charging problem - battery drain
Post Info TOPIC: Charging problem - battery drain
TTR2501966


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Charging problem - battery drain
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Hi all,

I have a problem with the charging system on my newly acquired TTR250 1995.

Symptoms are battery drain of 0.2V/hour, so it’s flat the next day. Also no charging when I rev the bike quite high(I don’t have an inductive tachometer)  – the voltage across the battery stays at its initial charge of approx. 13V – even when I increase or decrease the revs. I followed the steps for checking the charging system in the manual and I measured the resistance across the stator terminals and both figures were 1.9 ohms – the Yamaha requirement is 1.0 to 1.2 ohms.

So I’m pretty sure I need a new or rewound stator. I understand new stators are expensive so if anyone can recommend a company who rewinds stators that would be great. There are also sellers(Caltric and Celox) on internet sites  selling stators and Regulator/rectifiers – both for £110 inc postage but excluding any import tax etc. Anybody any experience of these parts

Regarding the battery drain do you think that could be related to the stator or will it be a completely separate issue such as live grounding etc? Previous posts I’ve read have pointed to the rectifier/regulator being a potential cause of battery drain. I’m waiting on a 500mA fuse arriving for my circuit tester then I’ll be able to start tracking the battery drain issue.

I’ve read some previous posts on this (thanks to all those posters) but one had been edited and I was a little confused. Any advice greatly appreciated on helping me solve my problems.

Also if anybody can recommend where they have bought an inductive Tachometer that would be appreciated also.

I’m really enjoying the forum – lots of really informative posts. I loved the essential tools and consumables sections –I’ve already treated myself to some ‘essentials’ J

 Thanks

Tony

 



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TTRfan


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Date:
Charging problem.
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Hi Tony and sorry to hear of your TTR's charging problems.

I suffered battery drain on an OE and decided it was something to do with a fault on the digital speedo.

Long story short, I put a simple connector in the red wire from the battery that hung out under the tank by the shock reservoir and just unplugged it when I parked the bike up! There is a bullet connector above the battery and I just plugged into that so that it was easy enough to put everything back to original.

Brian

Simple circuit breaker 001.jpg

Simple circuit breaker 002.jpg

Simple circuit breaker 003.jpg



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TTR2501966


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Thanks Brian that a good idea:)



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Rydasc6102


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Hi ttr2501996, I had the exact same problem on my 1999 ttr250. It's the rectifier/ regulator under the gas tank. Here is a link to picture of one. i.ebayimg.com/thumbs/images/g/1DoAAOSwFqJWoOU4/s-l225.jpg check it with a multimeter first just to be sure. There are videos on how to check a regulator/rectifier all over YouTube. I got a replacement for about $15. Hope this helps.


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TTRfan


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Hi Ryan.

Reg/rec leaking current to earth when the TTR ignition is switched off - not heard of that before but every day is a school day on here biggrin

Good call wink

Brian



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mossproof


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If a usb socket has been fitted to power gps or phone, they often have a constant current draw due to the mini transformer circuitry. Disconnect this if you have one to remove that from the equation.

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