11.8 volts engine on :((((((((

[kaanaslan96]

ive recently changed my battery on a 125CC thinking battery was faulty, but now bike cut off and when it started working it showed 11.8 volts on idle so problem is definatly not the battery so now i ordered regulator rectifier am hopping thats the problem but could it be stator and how likely is it to be regulator rectifier?

[mentalboy]

What happened to the shown voltage when you revved the engine?

[kaanaslan96]

[J.M.]

I've had a few regulators die with similar results. Never a stator.

However it can also be a wiring issue. The best tool for diagnosis is a multimeter.

As you've ordered a regulator, fit it, then use a multimeter to measure the voltage across your battery with the bike idling and then at 5k rpm. I'd be happy to see a figure >13v and <15v.

If the regulator doesn't do it, post back here, and we'll be able to guide you on how to track down where the issue actually is.
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2004 R1 & 2018 XSR900

[kaanaslan96]

[J.M.]

[Beefamus]

I've just had the same problem on my CBR. was reading about 12V on the battery at idle, 5k 9k and redline. higher the rev the lower the voltage got.

Took the Reg/Rec off and tested this with a multimeter. using This

Reg/rec was okay, but as i was putting it back on i shorted 2 of the wires and blew my main fuse, when checking this i was melted to the stator unit, with a little bit of corrosion on this.

Broke the main fuse trying to get it out, once i replaced it, battery was reading 13+V at idle and 14ishV at 5k+

Hope this helps,

Beefamus
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Rides: HN125-8 '11 - fell apart on me at 12months old --- Generic Worx 125 '12 - Written Off at 6 months old --- CBR125R 2012 -
13/09/12 - Passed A1 (light motorcycle) no more L Plates and can take pillion

[-]

If it does increase with revs, but is still low. Don't forget that the negative side relies on the frame to make the circuit. Check earths for corrosion on the negative side and fuse boxes etc on the positive side.
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TZR250 2MA road, TZR250 1KT road, TZR250 2MA race, TDR250, YZF-750R Boost colours.
Jaguar S Type 3.0 V6 Sport R, VW Transporter T5 GP LWB Shuttle 140ps DSG.

[stinkwheel]

It is quick and easy to test the stator windings are intact using a multimeter.

What bike is it?
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.