FS650 '08 stator issue?

Last week I bought an '08 FS650 with charging issues but with only 1500km and about 20 hours.
According to the previous owner this was due to a faulty stator.

Today I went through the electrics to ensure the stator is broken before I order a new one with the following results:
- Pulse generator coil resistance well within specs.
- Stator resistance well within specs.
- Charging coil ground-yellow 1,7 Ohms (instead of 0,65 +- 0,15 Ohms) and white-yellow 0,65 Ohms (instead of 0,16 +-0,03 Ohms). Note: I'm not sure whether these readings are accurate since these low resistances are hard to measure with a basic meter.

Before riding back at night we checked the voltage on the battery when running idle and this was only 12,7 volts so there's definitely an issue.
I turned on the lights and within 200 meters I had to slow down and the engine stalled, didn't want to start anymore afterwards (it's not an easy starter anyways).
Another thing I noticed as well was a lot of popping during engine braking.


My main question is whether this sounds like a stator issue or possibly something else?

Thanks in advance,
Jermo

Taffy said:

I'm wondering if someone has the wrong starter relay (solenoid) on it? there is so much to get wrong in that area.

you should see the letters 'M' and 'B'. the HT leads have to go;
battery+ to 'B' and the other HT lead from the the solenoid to the starter motor. then you have the order of the internal wiring inside the solenoid. people think they are all the same....they are NOT!!!

cheers

Taffy

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I have to add the bike will crank over when using the e-start and it fired up as well earlier that day. The battery was empty when I tried to restart and then it wouldn't start with the Kickstart neither.

Taffy said:

well exactly! so your battery isn't charging so you have to blame the stator or the solenoid! or the wiring, or the earth.

Taffy

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I double checked the wiring on the solenoid and this is fitted correctly. I guess I'll have to go for the stator then, could explain the starting issues as well.

Thanks for the advice!

I've ordered a new stator and will clean the carb this afternoon, if a jet is clogged this could explain the popping, stalling and start issues.

I replaced the stator and while running idle the battery gives about 12,6V but when I keep the revs a bit higher, the voltage drops to around 11V.
Anyone an idea what's going on?

nsman said:

Have your battery load tested

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The berg starts normally with the E-start but even with a broken battery, the voltage over the battery should be above the 13V when the engine is running.