Chinese Wk125R - jerking while drving.

[leehindle93]

Hey, new to biking and this forum! I'm new to bikes and have no idea what I'm doing really.

I recently bought a cheap Chinese bike from a friend for £250, wk125r but none of the electrics were working except the starting button (no lights etc). Had it in a garage and the guy said he rewired it all etc and now all the lights and electrics work. Cost £75. Since having that done the battery seems to be dead every morning, meaning it needs a bumb start. As I'm driving it, it jerks back and forward constantly as if its dying. It has even died while slowing down and dies most of the time you stop still for a few seconds. But then it starts back up with the button.. So the battery can't be dead? I don't have a multimeter to check the battery is giving enough power, i will get one tomorrow and check.

Sidenote; The indicators work and turn on while there is no key in the bike. Nothing else does though. Should this be the case? Or could this be the dying issue?

At first i thought it could be bad fuel, since it sat there for close to a year without moving. Added new fuel and still no change.

Got told it could be the spark plug from a friend, haven't checked this out yet, but could this be a cause too?

Could this be a battery issue due to the rewiring/lights getting fixed?

Thanks!

[pepperami]

wait for it , they`re gonna love you on here
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[Rogerborg]

Sounds like there's a short in the electrics that's draining the battery overnight.

You'll want to use your shiny new multimeter to check for a drain. Although I'd disconnect the -ve terminal and insert the multimeter inline there, rather than risking shorting the +ve.

If it shows any current, then start pulling fuses or disconnecting pieces of the electrics - starter solenoid, indicator relay, CDI - one at a time to identify what's drawing the current.

No chance there's an alarm wired in there, is there? If so, then you'll want to perform this maintenance on it.
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GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[leehindle93]

[Rogerborg]

I wouldn't expect indicators to work if the ignition isn't on, thus I'd suggest pulling the indicator relay when you're doing the draw test.

However, if they come on solid rather than flashing, that may be a weird parking-light feature, so I wouldn't fret over it too much.

The jerking while riding sounds like a loose connection. God knows what your spanner money has done to it. Definitely check the main -ve to earth connection. However, the battery draining is likely to be a short, so I'd address that before chasing after other problems.
____________________
Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[Polarbear]

[leehindle93]

[Polarbear]

[-]

Jerking when driving eh?

The best advice I could give it to wait until your back at home to mummy and daddy's or your student digs. It's got to affect the handling on a bike.
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[Daz1245]

You indicators shouldn't turn on with the ignition off there is a fault with the wiring, my opinion with chinces bikes, there terrible I bought one a few years ago had no end of issues with it, first day lost 2 rear sprocket bolts while riding it home and nearly come off, electrics always play up forever got flat battery, had a leaking tank as it rotted underneath, fuel leaked down bike and onto rear brakes causing brake fault while riding in the end I just scrapped it as it was a piece of shit.
This was a 2011 plate skyjet sj125, worst investment ever !!!!
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Current: 1994 Suzuki rf600r
Cagiva mito evo 3 2002, Yamaha xvs125 2000, skyjet sj-125 Chinese piece of crap

[Rogerborg]

That's a particularly bad bike, I've never seen a happy owner (other than in the very short term) or a nice used example.

Let's not write this WK off just yet.
____________________
Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[leehindle93]

Alright so, I looked at what he did for the indicators and this is what I see (attachments).

Obviously when the wire is in the hole (first picture) the indicators work without any power or key. In the second picture, they don't work at all.

Is this even safe? Or did the garage do a shit job?

I have no idea where to begin to fix that.

[chris-red]

[chris-red]

Please name and shame the garage, That is fucking awful.
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Well, you know what they say. If you want to save the world, you have to push a few old ladies down the stairs.
Skudd:- Perhaps she just thinks you are a window licker and is being nice just in case she becomes another Jill Dando.
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[chris-red]

Is that fucking speaker wire?
____________________
Well, you know what they say. If you want to save the world, you have to push a few old ladies down the stairs.
Skudd:- Perhaps she just thinks you are a window licker and is being nice just in case she becomes another Jill Dando.
WANTED:- Fujinon (Fuji) M42 (Screw on) lenses, let me know if you have anything.

[linuxyeti]

It does look like speaker wire !! The garage you took it to, wasn't richer sounds was it?

Either fix it yourself, or get the garage to do it properly
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Beware what photos you upload, or link to on here, especially if you have family members on them

[chris-red]

[Polarbear]

Take photos of everything the garage have done without altering anything.

Go back to garage, show them the pictures and demand your money back or else trading standards, solicitors, facebook etc. etc.

That is utterly criminal.
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[leehindle93]

It is a little garage near where I live in Newcastle, it got recommended to me. The guy seemed nice but obviously because i didn't know what I was doing, I didn't realise it was so bad.

At first he said £50 to get the lights working, I agreed. Then it went up to 75 because he rewired something and tightened the chain, I agreed, obviously.

The funny thing is, he rang back a little later and said for another £60, so £135, he would rewired the back of the back too. I told him no. BUT then he rang back again a few hours later and said he done it anyway, for free..


How would I even go about fixing this myself? I've spoke to a few other garages and they've all said it's "not financially beneficial" to pay for it to get fixed.

[Polarbear]

You need a wiring diagram for a start. A full one for the bike.

I doubt Haynes make a manual so is there an owners forum where someone has got one?

Then you need to go through the wiring and find every bodge, work out what its for and then remove it. Then you re wire as per wiring diagram and THEN, and only then you start trouble shooting.

As you can see, it isn't a surprise a legit garage has said no to the work. You either do it yourself or cut your losses and sell it on, as is on ebay or gumtree.
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Triumph Trophy Launch Edition

[leehindle93]

[chris-red]

[leehindle93]

[Polarbear]

Yes, you should be able to sort it from that.
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Triumph Trophy Launch Edition

[chris-red]