Scooter leaking fuel (detailed question)?

Hello everyone.

First of all, I know this might need to be looked at by a professional, but before I run to the nearest garage, I'd rather try it here.

A friend and I have a project at school where we buy an old scooter and repaint it, etc.

This one is also older, it's a Suzuki AN 125 from I think 1998 or 1999.

It's also sometimes a little finicky, requiring me to use the quick starter or sometimes crashing, forcing me to wait a while before I can turn it on. But that's not the problem.

The scooter is losing fuel (see pictures). It loses fuel both when it's stationary (it was just standing for two days and suddenly there was a small puddle underneath it) and when it's moving.

We know exactly where it's coming out (from this small hose, see picture), but not why. What's also surprising to us is that the hose even has two small holders, which means it almost certainly belongs there, since we haven't changed anything on the hoses.

Do you have any idea why the scooter is losing fuel and how to solve the problem?

Thank you in advance!

Joel H.

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blacksheepkills
3 years ago

This is the overflow hose from the carburetor. Probably dirt is in the carburetor and blocks the float needle.

Extend carburetors, open (documentally with photos!), wash out thoroughly with petrol and put it back together.

When disassembling, pay attention to possibly defective O-rings and exchange them equally.

For lay people relatively difficult, for someone who knows a Klacks…

But stupid question: school project? There is a demand that a roller be bought and repainted?

blacksheepkills
3 years ago
Reply to  joelhzz

So it might be. better if I ask my brother his godfather (travels himself motorcycle) so that we can watch and learn, but don’t ruin anything?

Wouldn’t be a chance if you don’t trust that, but the acquaintance… But remember: Not everyone who also has a car can simultaneously disassemble the engine πŸ™‚

The scooter should be relatively well known, there is also a YouTube video of the disintegration, which you can do by Step…?! Just look.

I’ll push you the thumbs!

blacksheepkills
3 years ago
Reply to  joelhzz

Nee, he is actually for venting the carburetor so that no vacuum is formed and the gasoline can flow further. Therefore, the hose also sits at the top of the carburetor, since there is usually no gasoline coming. If, however, your float needle sits tight and does not close properly, then unhindered petrol can run into the carburetor until it comes out of the hose at the top.

By the way, the hose is only at the carburetor so that overflowing gasoline can flow off in a controlled manner and does not ignite on hot (motor) parts…

blacksheepkills
3 years ago
Reply to  joelhzz

Yes, please don’t take water.

With air pressure, no crusts or bonds are obtained if there is something in it…

The O-rings are actually the small black seals πŸ™‚