engine stalls if any throttle given

[hondaxbr500]

Hi guys,
My Sachs Roadster 125 seems to be idling perfectly, but if i give it any throttle, the engine cuts out. Could it be a dirty carb? Any ideas?
Thanks a lot,
Leo

[ZaphodBeeble]

Sounds like a blocked main jet. Strip and clean the carb.

If it's still the same then check the condition of your spark plug.
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Current bike: VTR1000F Firestorm. Previous: Firestorm (written off) - XJ600 Divvy - NSR125 - DT125 and a load of offroaders.

[The Artist]

Check plug first. Easy to do. Should be light brownish. There are various pictures on the internet of good spark plug colours.

If its good, then clean the carb. Get someone to help you if you don't know how and don't loose any small parts.

[hondaxbr500]

Thanks guys. I checked the spark plugs, and theyre ok, so i guess its the carb that needs a clean. If the main jet is blocked, what could i use to ublock it?

[andys675]

[The Artist]

[hondaxbr500]

Ok, thanks a lot, ill try that. If that doesnt help, what else could it be?

[Faraz]

I used a needle to clean my jets.
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'56 Yamaha MT-01
'05 Nissan 350z Roadster GT
3 words dude.. Fvck. Yes.

[deanoet]

If you are cheeky once you have got the carb(s) off take them to a local garage / engineering place and get them to blast them.

The smaller the place the better, they tend to be friendlier.
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CBT Passed 18th July 2007 : Previous Bikes> CG125 : Current Bike> Hornet 600 : PASSED DAS 30th Oct 2007
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[Mr.Ormes]

if your lungs are big enough give it a blow yourself!!! make sure you wash the fuel off before putting it near ur mouth though lol.

failing that, a fingernail brush, and just push the jet onto the bristles so the bristles go through the jet hole. make sure theres no "jelly" in the bottom of your float bowl either, as that was the problem on my gsm's when they did that.
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DT 125 1995
Thumpstar 120
Suzuki ZR 50

[lukamon]

or, as i ue, an upside down can of lynx / similar, give it a spray till gas is coming out and viola
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killa wrote: Im an ass man myself

[hondaxbr500]

Ok, looked over the carb, put it back in, and it seems alright now. However, because i dont have a battery for it as of yet, ive been jumping it from my car. When the jump wires are on the bike, its completely fine, but when theyre taken off, it doesnt rev at all, no matter how much i open the throttle, and just keeps idling. Another thing i noticed, that with the jump lead off (while its running), turning any lights or indicators on makes it suddenly rev up. Even the passing light button did that. What could be wrong?
Thanks

[The Artist]

so you can rev it with jump leads attached?

Sounds like electrical problem now. Check the HT lead and spark plug cap. That's the thick wire going to the spark plug. Make sure its connected properly and no corrosion anywhere.

And when you say you rev and it keeps idling, it sounds like your throttle cable sin't attached properly either.

Do you have a mate who knows about bikes. Much easier to diagnose and fix if someone's there with the bike.

[hondaxbr500]

No the plug cap seems spanking clean.. The cable is in properly too, and if i move the throttle plate by hand, nowt happens either. But then again, when connected to a battery, everything works fine. Is it perhaps an alternator problem?

[The Artist]

I'm not sure about your bike see. Could be that it needs battery power to run.

So everything works ok with the car hooked up? If this is so, check fuses, all connections, rectifier and battery.

[hondaxbr500]

Checked those, they seem good. Since it works good with the battery hooked up, would i be an mot faliure that it doesnt work properly without the battery? Stupid question, but just checking.