Keeway TXM 125

[fullwavebridg...]

Hello all.

I recently purchased the said make n model to get on the road, well - as a back up mode of transport to commute if the car lets me down.
Took my CBT 13 months ago...
Been a struggle to find something affordable, viewed quite a few bikes, various manufacturers but most were knackered or doubtful for other reasons.

2015 model, 4k miles, almost mint condition, owners original receipt, previous MOT's and some service history.
After researching the make n model i checked everything i could and all was well, had a few enjoyable rides out .

Travelling down the road at 50 i started to lose power, pulled over fortunately into a lay by with the engine not running.

Fuel was ok, tried to restart but will not fire up, couldn't see any other problems so decided to have a smoke and think about recovery.

Tried again to start and fired up first time so i turned around to go home - a mile down the road the issue reoccurs - again give it 5 min and it fires up - it did nearly start after a couple of minutes after i operated choke which leads me to believe this could be carb related ?
Since then i have drained the fuel tank as that was in the tank at purchase, refilled with bp e5 petrol, took for a run and issue still appears.

My greatest fear in choosing this manufacturer was the aftermarket support, spares and documentation but didn't imagine it occurring so soon. yes i should have gone jap.
Need to carry out some work obviously to trace fault but would welcome suggestions (other than getting rid of it) - my plan was to run it for 6 months road experience and take my full bike licence before my cbt expires then sell the keeway on.

Has anyone had a keeway with this issue or any ideas regarding the problem.
My car mechanical skills are very good as are my electrical skills due to my work - and my tool collection is quite comprehensive - but without a service manual and lack of bike experience where do i start ? plug, air, fuel filter, i didn't have a plug socket to check for spark at the time of breakdown.

Many thanks
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It will soon be possible to transmit wireless messages around the world so simply that any individual can carry and operate his own apparatus.

[Easy-X]

Don't know that specific model but a couple of common things if you have that problem...

Fuel starvation: could be some restriction in the pipework, fuel pump not working 100% and the ol' open the fuel cap in case a vacuum is forming in the tank. I would have thought 2015 implies fuel injection so not so likely affected by a little water in the fuel or the ethanol content.

Overheating: something's getting warm and not liking it (leaving it a bit to cool down.) Might be the ignition coil breaking down (cheap n cheerful Chinese components.)
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Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[jaffa90]

""Fuel was ok, tried to restart but will not fire up""

When loosing power give it full throttle / choke and when stopped remove the spark plug to see if wet or dry.
Also smell the end of the exhaust.
Also test for a spark as you know.

[fullwavebridg...]

Thanks for the replies.

Both suggestions will be my target for diagnosis, firstly "spark" which will narrow it down.
Personally i think it's electrical (ignition coil), based on my 33 years of car experience - only once have i had a fuel problem... on a 1987 mini with a badly adjusted float chamber.
Absolutely pi**ing it down today and no roofed work area so awaiting fair weather.
I will venture out again but with some tools to hand and will report back with an update.

Changing subject, been out of the bike world for many years - my first bike was off road KE175 in 83 - then onto a DT100 i think it was.
These bikes were readily available on the sh market - years ago i used to wander through andy nobles and dowsons in Scarborough dreaming of a new trail bike (that i couldn't afford) with so many choices....
What happened to the industry ?
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It will soon be possible to transmit wireless messages around the world so simply that any individual can carry and operate his own apparatus.

[Easy-X]

People such as yourself got old and moved onto "Adventure" bikes
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Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[Robby]

The bike was running ok, then died for no reason. It didn't immediately re-start, but did after a little wait. Then it died again, and wouldn't re-start.

My first thought is the charging system. There is a howto on checking the charging system somewhere in this forum. You'll need a multimeter, and should get a battery charger anyway. Regulator/rectifier is what tends to go wrong.

Second possibility is water in the fuel, particularly if it has been standing a while and you haven't had it long. E10 fuel is particularly bad for this, but it's always been a problem on carbed bikes. Usual test is to drain the carb and see if any water comes out. Not generally a problem on injected bikes, they keep the fuel in the tank better stirred up.

Then you get down into things like ignition coil, ignition (key) switch and other things that shouldn't normally go wrong. Chinese 125s make diagnosis difficult, because things that aren't meant to fail often do.

[Nobby the Bastard]

I reckon it's the ignition coil breaking down when it gets hot and then starting to work again once it's cooled again. It's quite normal for them to do this working/not working faff for some time before they fail entirely.
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trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Sprint ST 1050

[WD Forte]

I had to track down similar sympyoms on a ybr125 a while back
the YBR is EFI not CDI and carbed is yours is I believe but you'd best say
so we dont go barking up the wrong trees.

Anyway like yours it stopped when running and would restart and run for a bit
with a fault code 33 saying the coil was the problem.
In breif, couldn't find any obvious problems with it but did notice that when running the headlight looked 'flickery' at tickover
After I opened cleaned and refitted the connector on the Regrec it ran perfick
and it has ever since.
The current theory is the noise from a bad power connector caused the ECU to have conniptions

For you, this means open, check and clean all electrical connectors
which should be an annual service thing anyway.
Also as it appears to have an AC or DC CDI system
either one will have pulser which needs to be checked
AC CDIs will have a source coil on the stator which have been known to burn out over time and are heat affected.
AC CDIs often have a tap from the source coil up to the ignition and kill switches
which is pulled low to stop the sparks/engine.
This is high voltage circe 200V so if you get the weather in connectors and switches
it may short to ground at inconvenient times.

I've also had plugs that would start just fine then fail as they got hotter 5-10 minutes after starting

it could also be fuel related for all we know so all the above may be bollox
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bikers smell of wee

[stinkwheel]

Does it have a rev counter? Often times (not always) if it drops spark, the rev counter will drop to zero because most of them are powered off the CDI pulses.

If the rev counter drops to zero when it conks out with the engine is still turning as you roll to a halt, it's almost certainly electrical. If it doesn't, it could still be electrical but with a much higher suspicion of it being fuel.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[Easy-X]

The TXM125 is a faux supermoto with fuel injection:

https://www.thebikemarket.co.uk/media/5392188/Keeway%20TX125%20orange%201.jpg?width=400&upscale=false
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Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[WD Forte]

The specs I saw for the 2015 said its a carbed model

https://bikez.com/motorcycles/keeway_txm_125_s_2015.php

OP's post suggested as such too , but best be sure

These chinese bikes are knocked out like sausages and getting reliable tech info can be a PITA
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bikers smell of wee

[fullwavebridg...]

Thanks for all of the responses.

Had an hour today in between rainfall and started stripping panel work off. Bit more to do tomorrow but i did manage to get a pic or two of the coil pack, in particular the wiring end and i really don't like the look of this earth connection on the coil body to chassis / earth tag.

Well Zoomed in on the PC and looks like it's badly corroded so will remove rest of panels, remove coil and sort that with scotchbrite and some switchgear grease.

Will need to check terminals at point of cable termination too as seen these hiding rot in the past, fortunately i have all the crimp terminals, shrouds and compression ratchet gun for this.

Carbed or injection ? i don't - i haven't even focused on this yet, no rev counter (or fuel level either) !
Will check charging, as well as battery, i have a Fluke plus a portable battery scope.
Found a couple of other daft annoying things, so the rivnuts and gun will be coming out....

The corrosion clean up "may" sort the primary problem, but a new coil is on order anyway.
Wait n see....
[img][/img]
____________________
It will soon be possible to transmit wireless messages around the world so simply that any individual can carry and operate his own apparatus.

[WD Forte]

Scotchbrite?
yer not scrubbing yer porrige pans you know
use some fine abrasive to get it back to clean bright metal to metal contacts then re fit and smear dielectric grease or even vaseline on it.

Looks like a DC-CDI or TI type coil to me
I'll guess back/white is power ( 12V) black/red control from spark unit.

As its new to you, I'd fit a new plug as matter of course and log the mileage so you know when it's time for a new one.
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bikers smell of wee

[fullwavebridg...]

[fullwavebridg...]

Cleaned up, just putting everything back together.
It wasn't bad at all actually, just looked bad on the camera pic.

Trying to find a coil for this model / year is tough, several suppliers out of stock in uk, with a 15 day wait - so they just order in from china anyway. I probably would have found one in uk new, but lost the will to live after a couple of hours online - and i aint in any rush for it.

Found the original oem part number, cross ref that and the same coil is used on several bikes which is no surprise....

ordered 2 (as there was a slight difference between them) from china with my aliexpress account - £8 a piece which is no hardship.
Even second hand ones from uk are £20 a piece and not really happy fitting used.
Just the waiting now...
____________________
It will soon be possible to transmit wireless messages around the world so simply that any individual can carry and operate his own apparatus.

[WD Forte]

I'd have tested the coil amongst other things before buying anything
otherwise you could end up playing 'swap and hope' which can be
time and money consuming.

'Test don't guess' is my usual mantra.

Having said that:
We did waste time and money buying a coil for that YBR as we trusted the repeated 33 error code the ecu gave out which turned out to be false in that case due to noise on the power rail.
The old coil is still working fine now the RR problem has been sorted.
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bikers smell of wee

[fullwavebridg...]

[jeffyjeff]

[stinkwheel]

If it's carbed, carb icing could be another possability for the list. It's not as common these days but is still a thing.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[Easy-X]

Coils can be perfectly fine when cold, with regards to testing, but fail under load.
____________________
Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[blurredman]

[fullwavebridg...]

New ignition coil arrived and has been replaced.
It was a silly shot in the dark i know...

Did an oil / filter change as well as spark plug whilst tools were out.
Air filter was spotless so duly refitted.
Took bike for a run and still have the same problem, carried a spare spark plug this time and checked for spark present when it wouldn't start.

Oh, i fitted a new battery today too as i noticed after a lot more research on the bike specs it had the wrong one fitted.

I now believe the problem is fuel / carb related as a few post replies suggested, but will read through them again before deciding which steps to take next.

Thanks to all for taking the time to reply so far.
____________________
It will soon be possible to transmit wireless messages around the world so simply that any individual can carry and operate his own apparatus.

[that_impulse_guy]

I have the efi version of this bike. TX125SM 2019.

"Travelling down the road at 50 i started to lose power, pulled over fortunately into a lay by with the engine not running.

Fuel was ok, tried to restart but will not fire up, couldn't see any other problems so decided to have a smoke and think about recovery. "

fuel was ok? as in, you had fuel in the tank? or what else is "fuel was ok" related to?

As you've alluded to, you're running out of fuel. It'll be float level/tap/crap in tank etc. Troubleshoot like any other bike running out of fuel when there is fuel in the tank. Its a simple bike, with a simpler engine.
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Gone: Yamaha DT50lc, Suzuki DR500, Suzuki A100, Kawasaki z250ltd, RD350YPVS, Suzuki DR Big, Kawasaki AR125, Kawasaki KMX200, Suzuki GS1000S, Katana 1100, GS550M, Suzuki RGV250
Now: Suzuki GSX400X, Suzuki RF900R, NS400R

[fullwavebridg...]

Thanks for the replies, it was this CDI unit at fault.
____________________
It will soon be possible to transmit wireless messages around the world so simply that any individual can carry and operate his own apparatus.