Stella 125 Automatica CVT
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Hooked
1980 P200E in progress, 2005 Stella 2T
Joined: 20 Jul 2018
Posts: 353
Location: Staten Island, NY
Sat Apr 27, 2019 8:40 pm quote
rowdyc wrote:
GREAT JOB! I'm glad you saved it. Someone will enjoy the crap out of it.
I have reason to get rid of it soon now. Next project started: First full restoration project.. 1980 P200E
Hooked
Honda elite
Joined: 19 Jun 2007
Posts: 382
Location: California
Sun Apr 28, 2019 7:48 am quote
wow that is amazing work congratulations!
Hooked
1980 P200E in progress, 2005 Stella 2T
Joined: 20 Jul 2018
Posts: 353
Location: Staten Island, NY
Fri May 03, 2019 7:27 am quote
Haven't had time to list this online yet with my garage rearrange and starting the p200 project, but I've noticed that if i leave this scooter unplugged from the tender for a couple days it won't start. Plug it into tender for 15 min and it will start fine. This battery is new and working fine. Just wondering if there is something that i can check to see if there is a drain on the battery when off, it if there are known electrical parts that go bad and cause this issue?

I had my scooters in front of garage all day yesterday and some guy stopped to ask if they were for sale and when i was showing him this bike, it wouldn't start. Wasn't actively trying to sell it but if someone wants it, ideally i need it to start every time!
Addicted
GL, PK, PE200
Joined: 24 Apr 2012
Posts: 532
Location: Deep in the heart of Texas
Fri May 03, 2019 4:37 pm quote
Sounds like your regulator is going out. That would be the first place I start.


Good luck!
Hooked
1980 P200E in progress, 2005 Stella 2T
Joined: 20 Jul 2018
Posts: 353
Location: Staten Island, NY
Fri May 03, 2019 5:26 pm quote
I've tested the current when idling and when revving. Everything is as it should. But you did get me looking at those circuits. I think it may be a bad cutout relay. Looking into that it seems a bad one would not function properly by preventing a fully charged battery from draining over time, also irregular starting signals which work sometimes but not others. This is a cheap part so i will try replacing that.

I also noticed today that the gas gauge only works when the battery is fully charged.
Hooked
1980 P200E in progress, 2005 Stella 2T
Joined: 20 Jul 2018
Posts: 353
Location: Staten Island, NY
Thu May 16, 2019 9:49 pm quote
rowdyc wrote:
Sounds like your regulator is going out. That would be the first place I start.


Good luck!
I couldn't get it to start for a few weeks and thought it was the starter switch, so I ordered that. Before it could arrive, I woke up in middle of night this week with a really dumb thought about why it wouldn't start. Went to test that dumb idea out today and that was it... kill switch was on! Hahahaha. I was overcomplicating things during the day but took a sleep induced thought to realize it was probably something I completely forgot existed on this bike, cause my other one has it disconnected. Starts up fine after charging on battery for days.

You might be right though about the regulator as despite testing with a meter when revving and idling showing good results, I see symptoms that make me wonder if it really is charging the battery when running. For example, the fuel gauge only works when the battery has been on tender for at least a night and is fully charged. First start up after overnight charged the fuel gauge goes to full as it should. Once I rev it up and take off, the gauge goes to empty. For the first 10 minutes or so of riding around city traffic with constant stops for lights, the gauge will go back to full when stopped at a red light. As soon as I take off again, drops to empty. After 10 minutes or more of riding around, the fuel gauge stays at empty. Same for battery, once I shut it down and let it sit, it won't start again without being on tender.
Hooked
1980 P200E in progress, 2005 Stella 2T
Joined: 20 Jul 2018
Posts: 353
Location: Staten Island, NY
Tue May 21, 2019 8:59 am quote
The 4 pin regulator for this cvt is out of stock at every place i search, so i purchased the 5 connector rms regulator for Stella 2t and Vespas with ac/dc battery system.

Just wondering if anyone has an idea what pins should match up between original 4 pin and the more common 5 pin regulator? I'll update with wiring diagram for them both tonight.
Ossessionato
73 Rally, 74 Rally, 76 ET3, 80 P200, 63 Li125, 65 Li225 Silver Special, 86 Elite 80, 2015 HD Road Glide Special, 2011 Ural Tourist
Joined: 18 Jan 2012
Posts: 3100
Location: Oceanside/ SF
Tue May 21, 2019 1:00 pm quote
Do you have a multimeter? Disconnect it from the tender and let it sit 30 minutes or so. Check DC voltage on the battery in the scooter, everything turned off. Disconnect the battery from the harness and measure again. Voltage shouldnt change more than a tenth of a volt or so. If you notice a difference something is shorting in the scoot causing that drain.

If your battery is over 3 years old it might be done. 3-5 max is all ive ever gotten out of the lead acid batteries.

As far as the regulators, please post some pics of what youre looking at/ what the new regulator looks like. Usually its an AC in, AC out, Ground, DC out. Occasionally theres an extra AC.
Hooked
1980 P200E in progress, 2005 Stella 2T
Joined: 20 Jul 2018
Posts: 353
Location: Staten Island, NY
Tue May 21, 2019 1:12 pm quote
MJRally wrote:
Do you have a multimeter? Disconnect it from the tender and let it sit 30 minutes or so. Check DC voltage on the battery in the scooter, everything turned off. Disconnect the battery from the harness and measure again. Voltage shouldnt change more than a tenth of a volt or so. If you notice a difference something is shorting in the scoot causing that drain.

If your battery is over 3 years old it might be done. 3-5 max is all ive ever gotten out of the lead acid batteries.

As far as the regulators, please post some pics of what youre looking at/ what the new regulator looks like. Usually its an AC in, AC out, Ground, DC out. Occasionally theres an extra AC.
Battery is almost a year old. I have multimeter and used to test voltages when running. I will try to test this to see if there is a shortage drain. Also will post pics of regulators later this week.
Hooked
1980 P200E in progress, 2005 Stella 2T
Joined: 20 Jul 2018
Posts: 353
Location: Staten Island, NY
Tue May 21, 2019 6:11 pm quote
Here are photos of the correct LML regulator with 4 pins for the CVT auto... ripped from google (couldn't get to garage tonight), and photos of the 5 pin RMS regulator (in hand from SIP) for the 2 stroke stella and vespas with battery system.

Seems the 5 pin regulator for 2 strokes connects:
-black to ground
-purple to flasher/buzzer/ignition on/headlight/taillight
-orange to ignition off/fuse and cutout relay to starter motor
-grey to headlight switch middle position/speedo fuel gauge/prd relay/stop light switch/blinker switch
-yellow to the magneto blue wire

4 pin CVT regulator connects:
-blue-white magneto wire to grey connector on regulator which connects to auto choke/speedo fuel gauge and lights/high-low switch center pos/daytime running lamp/tail light
-red wire on regulator to batt positive/ignition switch
-green on regulator to green on magneto
-black on regulator to black on regulator/horn/float unit/all speedo lights/kill switch
-yellow on the back of the regulator (not sure if this is literal or paired with one of the four connectors) to ECU VAR? switch (cant read this document text.. too small resolution)
-blue-white on back of regulator to ECU ground power

file.jpg
CVT auto regulator with 4 pins.

file (1).jpg

IMG_20190521_213806.jpg
RMS 5 pin regulator

IMG_20190521_213825.jpg

Stella_Automatic_125_Wiring_Diagram_1.jpg
CVT wiring diagram 4 pin regulator connections.

Stella_Automatic_125_Wiring_Diagram_2.jpg
CVT 4 pin regulator ECU connections

stella-service-station-manual-1.jpg
2 stroke 5 pin regulator connections.

stella-service-station-manual-2.jpg
5 pin regulator ignition connections.

Hooked
1980 P200E in progress, 2005 Stella 2T
Joined: 20 Jul 2018
Posts: 353
Location: Staten Island, NY
Tue May 21, 2019 6:25 pm quote
Examining these wiring diagrams might be confirming on paper (at least) to me that it is a faulty regulator.. as symptom of this scoot is a fuel gauge that shows empty on first start even on fully charged battery. Once warmed up, the fuel gauge creeps up to full as it should. then when driving it creeps back down to empty until at red light where it creeps back up to full for the first 10 minutes until battery drains a bit.

I noticed the grey wire from regulator that connects to blue-white wire on the magneto also connects to both the speedo fuel gauge and the auto choke. So I am gathering the auto choke being on when it first starts uses more energy than can provide for the fuel gauge to meet its correct resistance. This symptom goes away when the auto choke is disengaged after warmed up, bringing the fuel gauge back to correct reading. Driving the scooter then affects the fuel gauge resistance.
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