KymcoForum.com
Scooters - 125 to 300 => Agility 125 => Topic started by: Vision on August 23, 2020, 01:05:26 AM
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I've had headlight bulbs burning out and a high idle so I replaced the resistor; and bought a multimeter. After replacing the resistor the idle dropped in half which is good; am waiting on the bulbs. If I'm measuring the (DC) voltage right the battery at idle is around 16.5v. Is this a problem?
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Yes, this is a problem. The voltage reading is not suppose to be much higher than 14 Volts.
I assume you mean you have replaced the voltage Regulator. If not, the Voltage Regulator, or the battery itself might be faulty. Some battery cells might be damaged. You also need to make sure that the correct size battery has been mounted on the scooter. The current battery might be too small for the scooter.
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"I assume you mean you have replaced the voltage Regulator."
Yes.
I've been running this battery for 2.5 years. Is it the right size?
Mighty Max Battery YTX7A-BS Battery Replacement for GTX7A 32X7A 44023 CTX7A Battery Brand Product
Voltage: 12 Volt
Amperage: 6 AH
Chemistry: SLA, AGM
Terminal: Nut & Bolt
https://www.amazon.com/gp/product/B00K53DSZ6/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1&pldnSite=1 (https://www.amazon.com/gp/product/B00K53DSZ6/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1&pldnSite=1)
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The battery size is fine but if the battery voltage got too low at some stage the battery might be faulty.
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Just took the multimeter to the battery again and to my car's battery.
Agility:
13.5v when off
16.5v at idle
Car:
10v when off
14v at idle
Can't tell if there's a problem. If this is a problem would it be a stator problem? Too much charging?
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I wasn't aware a battery could generate that kind of voltage (13.5 when off). That is much higher than the the usual 12.5 - 12.7. ...and 16.5 at idle? did you check at higher than idle speed, when it's really charging? I don't know exactly what's wrong but you obviously have a charging issue.
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No, haven't checked it at higher rpm's.
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17.75v at full throttle.
Agility:
13.5v when off
16.5v at idle
17.75v full throttle.
Car:
10v when off
14v at idle
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17.75v at full throttle.
Agility:
13.5v when off
16.5v at idle
17.75v full throttle.
Car:
10v when off
14v at idle
Way too much voltage on the scooter. You said that you changed the regulator/rectifier .
When and why did you change it?
Sent from my Redmi 4 using Tapatalk
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I changed the regulator/rectifier (sorry all, not a resistor) last night because headlight bulbs are burning out. Also the throttle was high.
The numbers I'm posting are with the new rectifier, producing a more relaxed idle.
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Voltage at idle should be around 13.7V, and 14.3-14.7V at higher rpm.
Is the new rectifier original Kymco or an aftermarket one?
I had to change 2 rectifiers on my scoot, and only the OEM were good.
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It's aftermarket but do think it decreased the voltage.
I'm starting to think the stator is putting out too much voltage, and that burned out the original rectifier and increased the idle.
Probably need to check the voltage of the stator output; and find some videos online to do it.
Would the CCI have any effect on these readings?
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It's aftermarket but do think it decreased the voltage.
I'm starting to think the stator is putting out too much voltage, and that burned out the original rectifier and increased the idle.
Probably need to check the voltage of the stator output; and find some videos online to do it.
Would the CCI have any effect on these readings?
Decreasing voltage is not good enough, it has to be in the specified limits.
Didn't have a good experience with aftermarket rectifier. It just didn't work.
Checking the stator should be done.
CDI, as far as I know, doesn't have any effect on voltage.
Sent from my Redmi 4 using Tapatalk
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It's aftermarket but do think it decreased the voltage.
I'm starting to think the stator is putting out too much voltage, and that burned out the original rectifier and increased the idle.
Probably need to check the voltage of the stator output; and find some videos online to do it.
Would the CCI have any effect on these readings?
As far as I know a stator simply can not put out higher than normal voltage.
Maybe you should also check if the voltage keep on kreeping up quite fast just after the engine has been started. If so, that can be an indication of a faulty or incorrect voltage regulator.
Like somebody mentioned here — maybe only an OEM regulator should be used.
The 13+ voltage reading you got when the engine was not running could be normal - but only if you got the reading just after the engine was running, or just after the battery has been charged with a charger. The Voltage should drop to less than 13 volts after the battery was just standing for a while.
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It's aftermarket but do think it decreased the voltage.
Would the CCI have any effect on these readings?
Good question. The way a DC CDI on our scooters works - the CDIs have capasitors which generates high voltage for the spark plug. The CDIs draws volts from the battery, and feed the capasitors to generate high volts. The stator only triggers the capasitors to release the high voltage to the coil and spark plug.
To my mind this means the CDIs should have diodes to prevent a back flow of higher voltage to the battery. Faulty diodes can indeed cause a higher voltage reading at the battery.
This is only speculation, but yes - I think there is a possibility that faulty diodes in a CDI can cause higher voltage readings at the battery.
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After sitting for 36 hours the battery voltage is 13.25v.
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After sitting for 36 hours the battery voltage is 13.25v.
I think that battery has a problem. What was the voltage reading just after the engine has been switched off ?
You can get some information about 12 Volt batteries here :
https://www.batterystuff.com/kb/frequently-asked-questions/powersports-batteries-faq/12-volt-battery-reading-13-volts.html (https://www.batterystuff.com/kb/frequently-asked-questions/powersports-batteries-faq/12-volt-battery-reading-13-volts.html)
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I assume it was 13.5v as before. This weekend I may have time to measure the signal from the stator. Thank you.
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Maybe your voltmeter has a problem. Fully charged lead-acid battery is 12.6 vdc (2.1 v/ cell x 6 = 12.6) 13+ volts after hours sitting not connected to anything points to voltmeter. Even if still connected to bike this is too high if engine not running.
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I believe I measured the stator output correctly after watching some YT videos. Results:
135v AC at idle
300v AC at throttle
Does a new stator need to be OEM or will an aftermarket work? I've been waiting a month for a OEM CDI order with no signs of new news.
What should the numbers be? 12v and 65v?
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I'm watching the video again and maybe I did it wrong. There isn't a green ground wire (of the three pins there are only two wires going in. There's a wire going into the upper slot and the lower side by side slots only have one.)
I put both meter connectors on 2 of the 3 pins that have inputs; the black got the upper. Maybe I should have grounded the black to the bike and taken two measurements with the red probe. Thoughts?
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Stator readings using the frame as ground and measuring the two pins separately.
130v - 500v
125v - 250v
idle - throttle
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Stator readings using the frame as ground and measuring the two pins separately.
130v - 500v
125v - 250v
idle - throttle
I haven’t done a similar test and I am not sure how your test was done. Maybe if you can explain I can try a similar test to compare.
Anyway - a couple of minutes ago I decided just to do a simple test at my Agility’s battery just to tell you what a normal volt reading is suppose to be when the engine is running.
I was very surprised that the reading was about 17.6 Volts at idling speed !
The current Voltage Regulator on my Agility is an aftermarket component from China. It has been installed some time ago, and just after installation the Volt reading was definitily lower than 14 Volt.
Fortunalety I always keep a new Regulator in stock, and a brand new Chinese Regulator has been installed a couple of minutes ago. The Voltage reading is about 15.2 Volts at any given engine speed.
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Interesting.
For the test I used this.
https://www.youtube.com/watch?v=AZbg-krvZM4&t (https://www.youtube.com/watch?v=AZbg-krvZM4&t)
There's only two wires going into my three pin connector so the last test was done twice; the multimeter's red probe went to each pin while the black probe was grounded to the bike. Results are above.
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Okay, Unfortunately it is already dark on our side of the pond and I will try to compare tomorrow.
Unfortunately I will be alone at home and I hope to make a plan to rev the engine up while handling the multimeter.
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Stator readings using the frame as ground and measuring the two pins separately.
130v - 500v
125v - 250v
idle - throttle
Just to make sure about these readings - I assume you mean:
Volt reading at idle = 125 to 130 Volts
and
Volt reading at full throttle = 250 to 500 Volts ?
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No.
The stator connector has 3 slots with pins. One of the slots doesn't have a wire going into it so it's not measured.
In the other two pins, using the AC setting:
In one slot (with the red probe pushed into it) it measured 130v at idle and 500v throttling.
The other slot (with the red probe pushed into it) measured 125v at idle and 250v throttling.
For both measurements the black probe was touched to the frame for ground.
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No.
The stator connector has 3 slots with pins. One of the slots doesn't have a wire going into it so it's not measured.
In the other two pins, using the AC setting:
In one slot (with the red probe pushed into it) it measured 130v at idle and 500v throttling.
The other slot (with the red probe pushed into it) measured 125v at idle and 250v throttling.
For both measurements the black probe was touched to the frame for ground.
Thanks.
I just tested mine and these are the results.
1. Yellow wire from the stator - 30 Volts at idle and about 156 Volts at throttle.
2. White wire from the stator - 37 Volts at idle and about 152 Volts at throttle.
At times the Volts seem to spike quite higher at throttle but I am
not too sure whether it has to do the the multimeter I am currently using. My previous multimeter started giving problems some time ago and I am using my son’s multimeter at the moment. I am not sure about quality. It could also be caused by unstable multimeter connections because I was holding both probes with one hand.
I am not concerned about the results of this test. AC current is suppose to be quite higher than the scoot’s required Volts. AC output usually depents on stator specs.
No bulbs were blown in my case - so I will just get a spare Voltage Regulator just in case.
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Frequency sensitive on AC scale.... rpm goes up so does frequency to a reading error.
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Thanks scooterfan, yours seem healthy. Mine on the other hand has a fever. (:
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No problem. Unfortunately my time was very limited and it would be helpful if I had an extra hand just to make sure the probes were connected properly.
Hopefully an owner of a fairly new Agility with original components in perfect condition will be willing to do a similar test properly. It would be very helpful to get proper information to compare in future.