CHARGING PROBLEM

[jpderv]

hi again folks having problems with the hartford vr 125,

problem is i dont think its charging for the past week the lights have been rubbish and the indicators barely work,

tested the battery today and it read 7.2v and then with the bike started it was 6.4v which is capput i then screwed the terminals off the bike whilst it was running and tested the cables going to the battery and there was no voltage at all even when i revved the bike,

so i then went and purchased a new rectifier thinking that was the problem but no although when i retested the cables with them off the battery it would jump up to 4ish volts when revving im sort of at a loose end now i dont know what could be wrong.

i was always led to believe if the bike wasnt charging that when you remove the battery cables it would die at least thats the way a car works anyway but the bike continues to stay running when i do this.


anyone any suggestions?

Thanks in advance.
____________________
1st bike= skyjet 125 2nd bike= suzuki ts 50 x 3rd bike= peugeot speedfight 2 100cc 4th bike= suzuki katana 50cc 5th bike honda cg125 6th bike = yamaha dt125 r 7th bike honda rebel 125cc 8th bike hartford vr 125cc current bike = honda mtx 125

[spyuggy]

Sounds more like your regulator mate.
____________________
Treat each day as if it was your last, because one day you will be right.

[jpderv]

[unitynotsocri...]

not a good idea to disconnect the battery when the engine is running.Due to the recent cold and dwindling daylight its at this time of year that knackerd batteries die.Try another battery first and if you want to check the voltage always check it across the battery terminals,with and without the engine running.

What voltage does the battery read when disconnected?
____________________
nearly a normal tax paying tosser.......with ferrileness suzi100,cg125,cb125scb100n,cb175,cd100,cj250t,kh250,c15,125 bantam,super 6,rickman gs750,xt500,250rs,dt175,lifan125,dolomite1850,metro,Morris220ld,morrisfg,leyland princess,range rover,corsa,vw camper .now struggling with legs. MORE ORDER = MORE CHAOS

[jpderv]

[unitynotsocri...]

it may be the battery is too knacked to hold a charge.Try another one to see,This time of year small bike electrics suffer severely if they have a knacked battery.

You should get 13.5. to 14.5 volts on a good battery.(without lights on)
____________________
nearly a normal tax paying tosser.......with ferrileness suzi100,cg125,cb125scb100n,cb175,cd100,cj250t,kh250,c15,125 bantam,super 6,rickman gs750,xt500,250rs,dt175,lifan125,dolomite1850,metro,Morris220ld,morrisfg,leyland princess,range rover,corsa,vw camper .now struggling with legs. MORE ORDER = MORE CHAOS

[jpderv]

[unitynotsocri...]

depends on where you testing for voltage,there's loads of ways to do it wrong.The multimeter can read O volt if they are connected to the generator coils as the power is Alertnating Current.Many systems need the battery in in order to work ,whether its knacked or not.
You might find that putting a better battery in will sort it out.
____________________
nearly a normal tax paying tosser.......with ferrileness suzi100,cg125,cb125scb100n,cb175,cd100,cj250t,kh250,c15,125 bantam,super 6,rickman gs750,xt500,250rs,dt175,lifan125,dolomite1850,metro,Morris220ld,morrisfg,leyland princess,range rover,corsa,vw camper .now struggling with legs. MORE ORDER = MORE CHAOS

[Fizzer Thou]

Is the bike system 6v or 12v?There seems to be a chance that it is one or the other.If you are capable of using a multimeter it is best to ascertain which it is before you go any further.
____________________
Just talk bikes.What else is there?

Always have a 'Plan B'

[jpderv]

[quote="Fizzer Thou"]Is the bike system 6v or 12v?There seems to be a chance that it is one or the other.If you are capable of using a multimeter it is best to ascertain which it is before you go any further.[/quote


lol its 12v im not that thick il try get my hands on a new battery tomorrow and try that to see how that works.
____________________
1st bike= skyjet 125 2nd bike= suzuki ts 50 x 3rd bike= peugeot speedfight 2 100cc 4th bike= suzuki katana 50cc 5th bike honda cg125 6th bike = yamaha dt125 r 7th bike honda rebel 125cc 8th bike hartford vr 125cc current bike = honda mtx 125

[MickC]

Could be the alternator is on its way out, but as suggested check the battery first.
____________________
XX XXXx
Previous: CG125,XS250 (converted to 400),Z250A, GPZ550, Norton Commando, XS500, 78 Laverda Jota, GPZ1100,Harris bonneville, XV750 (mono shock),TR1

[whitedevil]

https://www.offwidth.co.uk/bike/general/electrical_fault_finding_2.pdf
____________________
GPZ500 sold ~ CBR600FS-2 sold ~ ZX6R sold ~ Street Triple R

[Fizzer Thou]

[quote="jpderv"]

[weewards]

Hi, all the messages so far have coverered the battery testing but on a slight tangent I use an Optimate 4 charger and not only would it tell if the battery is knackerered it would also try to fix it if the battery is sulphated, just a thought

[jpderv]

I was not trying to imply anything.In your first post you mentioned voltages around the 6-7 volt measurement.If this was on a 6v bike then the battery would have been reading okay.As I do not know your machine and that it has a 12 volt system,then this may well imply that there may be a fault with the battery or the charging system.
If you had an Optimate you could try to recover the battery,as this is what this item does quite well.But if the battery is not holding a charge,try using another battery and then perform your voltage checks.If there is insufficient voltage across the battery terminals when the engine is revved this may well imply that there is insufficient AC volts from the alternator.

Have you tried checking the resistance from the negative terminal lead to a good point on the frame?This should read zero ohms.Anything like 10 ohms or more will show up as a bad earth,in which case your battery will not have the right path for charging from the alternator/rectifier/regulator.[/quote]


na i know mate just kidding yeah i did fit a bigger battery out of a quad today the battery read 12.85v when engine was off and 12.4v when the engine was started revving the bike made no difference to the voltage i bought a new multimeter its a cheap one though so not sure if its working correctly because i put it to ac and connected the black lead to the frame and touched the red one on a fewof the wires coming out of the stator and the voltage was like 160 or something then on other wires it rose up until it was out of range and the pdf that white devil sent me doesnt really apply to me because i have a hartford.
____________________
1st bike= skyjet 125 2nd bike= suzuki ts 50 x 3rd bike= peugeot speedfight 2 100cc 4th bike= suzuki katana 50cc 5th bike honda cg125 6th bike = yamaha dt125 r 7th bike honda rebel 125cc 8th bike hartford vr 125cc current bike = honda mtx 125

[Bezzer]

[jpderv]

[unitynotsocri...]

the stator wires will have two wires to the pick up/ign trigger and should have three to the charging/lighting circuit.by finding the colour codes (compare with other similar engines/models) you can test the resistance across the coils and pick up/ign trigger to see if they are knacked or not.Sometimes the insulation gets dry and brittle .before taking the stator cover off try checking the connector block contacts are clean and a tight fit.If you get a spark you can ignore the pick up/ign trigger coil.
____________________
nearly a normal tax paying tosser.......with ferrileness suzi100,cg125,cb125scb100n,cb175,cd100,cj250t,kh250,c15,125 bantam,super 6,rickman gs750,xt500,250rs,dt175,lifan125,dolomite1850,metro,Morris220ld,morrisfg,leyland princess,range rover,corsa,vw camper .now struggling with legs. MORE ORDER = MORE CHAOS

[jpderv]

[unitynotsocri...]

top right black box with 2 crosshead screws is your pulse trigger,the oil is no problem as the engine oil bathes the rotor,

Guess that theres a yellow and a pink wire and a green coming from your coils.black/red and green/white may be your pulse/trigger coil

it looks ok but you need to get a wiring diagram and test the resistance with the multimeter.Dont pull the wires out,you can test across the connector block.also check that theres a good earth wire to the starter and frame

On the rotor you should see a little magnet fitted.When the rotor spins the little magnet passes over the black coil/box to tell the cdi to spark
____________________
nearly a normal tax paying tosser.......with ferrileness suzi100,cg125,cb125scb100n,cb175,cd100,cj250t,kh250,c15,125 bantam,super 6,rickman gs750,xt500,250rs,dt175,lifan125,dolomite1850,metro,Morris220ld,morrisfg,leyland princess,range rover,corsa,vw camper .now struggling with legs. MORE ORDER = MORE CHAOS

[unitynotsocri...]

been rooting for a wiring diagram but no luck.you could try looking at alternator parts for eastern non jap bikes and see if you can find a coil set the same,making a note that one central coil is different,then,uses that as a guide to backtrack to 'resistance measurements.

many of these chinese bikes use the the same type coils.Its quite rare that charging coils break so your problem might be elsewhere,e.g. a loose wire or commectors that have been put back wrong.Sometimes when someones taken out the wiring loom to say,replace a headlamp shell they can wire up the greens wrong,mixing up the indicator earth and the lighting /switchgear earth.i'll keep looking for you.
____________________
nearly a normal tax paying tosser.......with ferrileness suzi100,cg125,cb125scb100n,cb175,cd100,cj250t,kh250,c15,125 bantam,super 6,rickman gs750,xt500,250rs,dt175,lifan125,dolomite1850,metro,Morris220ld,morrisfg,leyland princess,range rover,corsa,vw camper .now struggling with legs. MORE ORDER = MORE CHAOS

[jpderv]

[Bezzer]

[jpderv]

[unitynotsocri...]

dont waste your money before checking your wiring out with the multimeter,although its a pain its well good for your skills.with a spec sheet it will be so much easier than replacing the electrical componenets.

check for water in indicators and loose/chaffed wire all over the loom,
____________________
nearly a normal tax paying tosser.......with ferrileness suzi100,cg125,cb125scb100n,cb175,cd100,cj250t,kh250,c15,125 bantam,super 6,rickman gs750,xt500,250rs,dt175,lifan125,dolomite1850,metro,Morris220ld,morrisfg,leyland princess,range rover,corsa,vw camper .now struggling with legs. MORE ORDER = MORE CHAOS