Suzuki gsx s125

[C0rruptd0wnl0...]

So I'm seeking advice.

I have a suzuki gsx s125 2017 gp, the issue I'm facing is the bike losing power and dieing after a short distance (has led to some rather long walks home pushing it).. I originally believed the issue to be the stator not charging the battery, however I have now replaced the stator, and still the same issue continues.

With a freshly charged battery, the bike starts and runs. There is a whine on the engine on acceleration and deceleration. The bike will run until it has drained the battery, and then starts to die a slow death. The abs light flicks up on the speedo to start with, even at 50mph, it will then slowly dim out as the bike seems like its starved for fuel and then seems to be misfiring, upon which gears no longer show on the speedo. Then engine then cuts out after a cough and splutter. All of this happens within 5 to 10 minutes. I've also noticed I no longer have low or high beam lights even when at full battery, the light on the speedo doesn't light up at all when switching between them or touching the yellow pass button..

Unfortunatly I am self taught with all of my mechanic ability and electrical knowledge, and this is leaving me stumped. A friend of mine thinks it could be the cdi. I thought to hit a forum and see if you beautifully minded people could advise before I go spending a lump of money on a new cdi.

Thank you in advance

[Nobby the Bastard]

The battery should last more than 10 minutes before it's flat.

Are you actually checking the voltage on the battery? Have you checked to see if the voltage goes up to 14-15V when the engine is running?

It sounds more like the HT coil is breaking down when hot.
____________________
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

[C0rruptd0wnl0...]

[Bhud]

As you will have noticed from replacing the stator, replacing stuff isn't the way to go. It's all about diagnosing and testing things, until you've absolutely determined the cause of the fault.

Is it correct to say that you get all the lights and everything back, and the bike runs for 14-15 miles, when the battery is fully charged with a trickle/smart charger?

Have you checked your fuse box with regard to the indicator dash lights and headlight?

[C0rruptd0wnl0...]

Yeah, apart from the whine on acceleration and deceleration everything does come back, apart from the high beam and high beam indicator.

And I have been through the fuses and all seem to be okay and not blown.

[Nobby the Bastard]

[C0rruptd0wnl0...]

[WD Forte]

Buy a meter!
for less than £20 you buy one that can save you lots of time and money
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bikers smell of wee

[C0rruptd0wnl0...]

[C0rruptd0wnl0...]

So I've got my multimeter now. What's the best way to go about diagnosing the problem?

[Robby]

Set it to DC volts. Connect to the battery.

With the bike all turned off, you should be seeing 12.5-13v. That's the voltage of a healthy, charged battery.

With the engine idling it should be around 13v, and stable. If the voltage is dropping, it isn't charging.

With the engine at 4000rpm (ish) it should be around 14.5v and stable. Generally if the charging system is knackered, you will see 12v and falling at this point.

If it isn't charging and you already replaced the stator, next common point of failure is the regulator/rectifier. Don't buy a £10 one on ebay, they're shit. If you're going to get a pattern part rather than genuine Suzuki, get it from someone reputable like Wemoto. More chance of it working, and you can return it if it doesn't work.

[jeffyjeff]

[C0rruptd0wnl0...]

Okay, thank you guys. I'm gunna give it a try and see where it all gets me..

[C0rruptd0wnl0...]

[Nobby the Bastard]

It could well be the stator so I'd check the output from that before youi assume the RR.
____________________
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

[C0rruptd0wnl0...]

[Nobby the Bastard]

In that case I'd check the output from the rrr first after disconnecting it from the loom just to check that the loom isn't the issue.
____________________
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

[C0rruptd0wnl0...]

So, it would seem it is now fixed.. I replaced the rectifier.. And now the battery is pulling a solid 14v while running. Thank you guys for all your help!!