Bad stator? By jimbo1710 (Read 644 times)

[jimbo1710]

Hello all.

My wife's 2011 250cc jonway doesn't seem to be charging. I only get a reading of 12.62 at the battery while running up to 5000 rpms. I changed out the relay and rectifier/regulator and no help. I do get a reading of 71-73 volts at 5000rpms at the yellow stator wires. However, when I do an ohms test I get a reading of 7.6-8.0. Would this mean the stator is bad? thanks, Jim

[JR]

jimbo1710

On the yellow wires how are you doing the reading with your meter? Are you testing them one at a time to ground or from yellow wire to yellow wire? Also is this reading at idle or revved up?

JR

[jimbo1710]

yellow wire to yellow wire. I revved up to 5000 rpm and got the 70 volts. when I have the multimeter on the battery to check, it shows I'm getting about 13.37 volts getting to the battery at 5000 rpms. My mc250b shows about 14.4 at 5000rpms. Both of them have new batteries in them.

[JR]

jimbo1710 is your wife's scooter the vertical engine? Is your scooter the Linahi horizontal engine? From your readings I'm saying your scooter is the Linahi?

JR

[jimbo1710]

You are correct JR. She only has 400 miles on it, and it's a 2011. We haven't rode in two years due to shoulder surgeries. Maybe that's all her stator will put out, I don't know. I did replace the tail lights and blinkers with led bulbs. I just don't want to go through the hassle of changing the stator if I don't need to. All the wire connections and grounds seem to be good.

[JR]

If that's the case jimbo1710 then a little over 13.5 volts is common on this engine. The stator even though 18 coil like the Linahi isn't as big/strong. There are a few things you can do to milk out another 0.5Vdc and you've already started with some LED's. Replace even the instrument and license plate light with power saving LED bulbs, make sure the battery connections especially the ground wire are very clean and where the ground wire hooks to the frame the pain is removed so you get a 100% ground.

Lastly if you know how and want to you can replace the blocking diode with a relay that will add a bit more. With all this you can generally get it up to 14Vdc or a tad better.

JR

[jimbo1710]

thanks JR. I already sanded the paint for the ground, and I installed the gy6 relay. I never thought about replacing those other bulbs. I have read where some replaced the R/R with one from Oregon something. It's $95.00 and they say it gave a little more volts. Do you think this might help? I'm willing to spend the money if it would make a difference.

[JR]

Yes jimbo1710 in fact here is the video of a long time member here who did just this and the link:

thescooterprofessor.proboards.com/thread/534/electrical-yosters-upgrade-yy250t

[ellpee]

In one place you say 12.62v (not great), in another 13.37v (not all that bad). ? I'll second the motion on the Oregon R/R, it did wonders for my 2011 Roketa. I also put in an on/off switch for the headlight, since AZ doesn't require it in daytime and I never rode at night, but that might not work where you live. There is such a thing as an LED bulb for the headlight, but I never got that far. That light draws a lot of juice, as does the cooling fan when it's on.

[jimbo1710]

after I sanded the paint off the ground I got a little more volts. I just ordered the Oregon motorcycle parts R/R. I hope this helps.

[jimbo1710]

In Ohio, I don't think we have to run headlights. However, I will always run mine to try and be more visible. I have had enough butt wipes pull out in front of me that I want to be as visible as possible. I think they see it's a scooter so it must be going slow so they pull out. I have been close enough to see that they are looking right at me, then pull out!

[ellpee]

Mar 8, 2016 10:27:52 GMT -6 jimbo1710 said:

In Ohio, I don't think we have to run headlights. However, I will always run mine to try and be more visible. I have had enough butt wipes pull out in front of me that I want to be as visible as possible. I think they see it's a scooter so it must be going slow so they pull out. I have been close enough to see that they are looking right at me, then pull out!

Good point. As long as it's not causing your battery to run down every 50 miles or so, headlights is better.

[jimbo1710]

Thanks to all for your help. I installed the R?R I got from Oregon motor parts, and my volts went from 13.37 to 14.98! What a difference from just adding a quality part.

[ellpee]

Mar 12, 2016 14:46:01 GMT -6 jimbo1710 said:

Thanks to all for your help. I installed the R?R I got from Oregon motor parts, and my volts went from 13.37 to 14.98! What a difference from just adding a quality part.

Yup, my experience too. Tried numerous things to reduce load on the system before finally giving in and buying from Oregon, best move I ever made as far as maintaining my scooter. Don't know what's different about the innards of his R/R's, but they put all the others in the shade.