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125CC doesn't have power!

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Rooz12
Borekit Bruiser



Joined: 05 May 2021
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PostPosted: 17:50 - 29 Dec 2022    Post subject: 125CC doesn't have power! Reply with quote

Hello,

I have a JINLUN 125cc JL 125-11 which is a project.

I managed to get this started a few times so I know it starts and runs. This was a week ago so not long ago.

But today I tired to start it again and it looks like I get no power!! I have no horn either!

The bike doesn't have a kickstart... It only has a electric start/button.

When I push the start button, I get nothing, no sound from the starter coil either!

So, I checked the fuse and it was fine. it only has 1 main fuse I think.

Next I checked the battery and when I plugged it into my battery charger, the charger shows its almost full (1 bar less than full battery).


I tested some of the wirings using my needle voltage tester and they all seem to have some power running through them!

I'm actually confused as to whats causing this and why this has happened!

During my research online, I came across some information about the bike not being neutral hence not having any power so I made sure the bike is on neutral as well. I can spin the front sprocket forward and backward with my finger.


Can someone please shed a light on this?


Thanks in advance.
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jaffa90
World Chat Champion



Joined: 06 Apr 2016
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PostPosted: 19:17 - 29 Dec 2022    Post subject: Reply with quote

What is the battery voltage reading (dc) and then using the negative / earth probe on the bike frame when fitted?
In other words is the battery connected to the bike?
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Nobby the Bastard
Harley Gaydar



Joined: 16 Aug 2013
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PostPosted: 20:46 - 29 Dec 2022    Post subject: Reply with quote

There are usually cut out switches on the clutch and sidestand. Are they working correctly?
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Rooz12
Borekit Bruiser



Joined: 05 May 2021
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PostPosted: 00:17 - 30 Dec 2022    Post subject: Reply with quote

jaffa90 wrote:
What is the battery voltage reading (dc) and then using the negative / earth probe on the bike frame when fitted?
In other words is the battery connected to the bike?



I havent tested this but will do tomorrow and will update here.
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Rooz12
Borekit Bruiser



Joined: 05 May 2021
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PostPosted: 00:20 - 30 Dec 2022    Post subject: Reply with quote

Nobby the Bastard wrote:
There are usually cut out switches on the clutch and sidestand. Are they working correctly?


I have a kill switch on the side stand but the bike is on the middle stand.

The issue is that my horn doesnt work either and this was working regardless of kill switch!

It looks like nothing electrical works now but I havent changed anything since the last time I started it which was last week...
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WD Forte
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Joined: 17 Jun 2010
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PostPosted: 01:49 - 30 Dec 2022    Post subject: Reply with quote

WTFs a 'needle voltage tester' ?

is that a spikey probe with a light type thing?
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jaffa90
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PostPosted: 02:36 - 30 Dec 2022    Post subject: Reply with quote

WD Forte wrote:
WTFs a 'needle voltage tester' ?

is that a spikey probe with a light type thing?


Maybe,???
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Rooz12
Borekit Bruiser



Joined: 05 May 2021
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PostPosted: 05:00 - 30 Dec 2022    Post subject: Reply with quote

WD Forte wrote:
WTFs a 'needle voltage tester' ?

is that a spikey probe with a light type thing?



Hahahaha

Yeah brother... that's the one... it's a sharp needle that you push into the wires and the light goes red if its live.

This one to be exact:
https://www.ebay.co.uk/itm/311989643737?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=mNxrbkO5Sx6&sssrc=2349624&ssuid=qBQFqjchSoO&var=&widget_ver=artemis&media=COPY

It's basically a circuit tester.
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A100man
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Joined: 19 Aug 2013
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PostPosted: 11:37 - 30 Dec 2022    Post subject: Re: 125CC doesn't have power! Reply with quote

Rooz12 wrote:
I have no horn either!


This seems to be the most serious aspect.. I'm surpised Nobby hasn't already proposed a remedy.
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Nobby the Bastard
Harley Gaydar



Joined: 16 Aug 2013
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PostPosted: 12:15 - 30 Dec 2022    Post subject: Re: 125CC doesn't have power! Reply with quote

A100man wrote:
Rooz12 wrote:
I have no horn either!


This seems to be the most serious aspect.. I'm surpised Nobby hasn't already proposed a remedy.


TBH I've only just seen it. What about lights? Does anything work?

Beginning to suspect the ignition switch.
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Easy-X
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Joined: 08 Mar 2019
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PostPosted: 12:47 - 30 Dec 2022    Post subject: Reply with quote

I'll make the assumption that the wiring is just like, with all due respect, any other piece of Chinese shite.

The horn wiring order will be something like:

Battery (red wire) Ignition (black wire) Horn Switch (yellow wire) Horn (green wire) frame/battery negative

Your colours may be different but the above is generally what the Chinese use. I would start tracing out from the battery and along the chain and see where the power stops.
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Kawasaki Jimbo
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Joined: 09 Oct 2015
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PostPosted: 13:58 - 30 Dec 2022    Post subject: Reply with quote

Horn and clutch switch being on the same side I’d wonder whether there is a shared but broken earth on the left handlebar.

Any change when you have the stand up and the clutch pulled in?
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Rooz12
Borekit Bruiser



Joined: 05 May 2021
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PostPosted: 16:27 - 30 Dec 2022    Post subject: Reply with quote

Thanks everyone. I managed to start it again. The issue was as stupid as it sounds. There was a black earth wire that was pulled out of the ignition somehow.

But I still dont have a horn!

I will need to investigate this further and find out why the horn stopped working now.

I wonder if this is because of another wire getting pulled out somehow!!!
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WD Forte
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PostPosted: 16:48 - 30 Dec 2022    Post subject: Reply with quote

Rooz12 wrote:
WD Forte wrote:
WTFs a 'needle voltage tester' ?

is that a spikey probe with a light type thing?


This one to be exact:
https://www.ebay.co.uk/itm/311989643737?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=mNxrbkO5Sx6&sssrc=2349624&ssuid=qBQFqjchSoO&var=&widget_ver=artemis&media=COPY

It's basically a circuit tester.


I see
Not utterly useless but of very limited use.
Getting a voltage is not as useful as knowing what voltage

You could have bought a basic but respectable and very useful
meter for that.
This one for instance is half the price and way more than twice as useful for bike electrical work.

https://www.ebay.co.uk/itm/314265055493?
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