Honda NSR 125 not firing (carburetor cleaning?)

[Simon13245]

Hello there good people.

Today I wanted to go for a joyride, yet my old NSR wouldn't start. She was sitting only 24h. So I tried to diagnose the problem:

- There is a spark (checked it),
- There is a fuel coming right to the carburetor (removed the tank and the fuel line). While removing the fuel line on the carb side, a lot of gas spilled.
- Starter works normally, it sounds just like it did 1 day ago.

So what would be your diagnose? Carburetor and jets cleaning? As I mentioned at the beginning the bike was sitting like 24h and was working normally.

Thank you for your time.
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Honda NSR 125R (1999)

[Nobby the Bastard]

If it was working yesterday and isn't working today it won't be the carb.

Most problems are electrical. Probably a weak spark.
Edit: has the exhaust valve stuck in the high rev position?
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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

[Simon13245]

[Easy-X]

If you take the plug out, touch it to some bare metal on the engine, turn it over are you getting a nice, bright white/blue spark or a pathetic yellow/orange one?
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Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[Simon13245]

[Easy-X]

[Simon13245]

[Easy-X]

Looking at that carb... is it one where the choke dumps a bit more fuel in (as opposed to actually choking the air flow) If so maybe try restricting the air intake a bit and see if it starts.
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Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[Simon13245]

[Easy-X]

Sticking your hand over the intake simulates a butterfly valve choke. You still have the same amount of fuel but as there's less air available the mixture is richer. But what your carb should be doing is opening a valve to dump more petrol in. More petrol, same amount of air = richer mixture.

I'd have a look at the choke cable and pay careful attention to the marked bit here...

https://i.imgur.com/6DJaGpa.jpg?1

...which happens to look - and excuse the technical term - a bit fucked
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Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[Simon13245]

[Simon13245]

Just wanted to report back on the current situation.

First of all after some help from the mechanic the carb is clean and now the bike fires normally.

Also, we managed to get rid of the oil leak (sort of?). It was coming from the starter. Now after changing the gaskets on the starter the oil leaks from time to time from the breather hole on stator side (left crankcase). It usually drips when I push the bike very hard. For now, I'm leaving it as it is, I don't think I will invest any more time and money into this machine
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Honda NSR 125R (1999)

[to v or not to v]

[Simon13245]