1980 Vespa Grande, no fuel

Aimee Delin /

I acquired a Vespa Grande a few weeks back, and have been struggling to get it to fire ever since. I have rebuilt the carb twice now, and cleaned it so well I can see my reflection in every part of it, however it still refuses to spray fuel. I must have turned the engine over at least 1000 times now, and not one single fire, I have spark, but never see any indication of fuel entering the cylinder. Plug is dry upon removal, never smell fuel, don't see fuel out the plug hole or the carb intake when filter/plug is removed. The bowl is filled every-time I have removed the carb, I am totally at a loss, any suggestions?

Re: 1980 Vespa Grande, no fuel

Por some fuel in the spark plug hole and see if you can get it to fire briefly or at least lube the cylinder.

rig up a power drill with adapters to a 15/16 socket that way you can spin the motor while you monky with the carb at the same time.

Re: 1980 Vespa Grande, no fuel

Hugh Goldspiel /

Unplug the line, hold it by your carb, turn the petcock on. Look to see if fuel comes out, go from there. Clean your tank really well, examine fuel delivery petcock , is the filter clogged ? And if none of that works change your engine seal off the crank. If your bike is old, and if the carb ever got dirty or clogged you have to blow it hard in the tiny holes with compressed air at an automotive place, or use a good air compressor or you'll never get it to work right. I've had to do that a few times.

Re: 1980 Vespa Grande, no fuel

Aimee Delin /

At this point I am not even sure what to do with the carb, as everything seems to be in perfect working order, however the drill is a good idea, as I can now spray starter fluid through the carb while I crank the engine.

I must admit my experience with carburetors is lacking, everything is as clean as I can get it, and compressed air/carb cleaner flows through all jets and channels, but it still will not suck fuel when I am cranking, what else could be causing it to not pull up fuel from the bowl?

Re: 1980 Vespa Grande, no fuel

Hugh Goldspiel /

Don't take a drill to it. Take the carb off, carefully take the float and float needle off, don't get any cleaner on the needle, then you want to spray it off, or soak it with carb cleaner, bring the body of it with a rag to any auto place in town, borrow their air blower with the pointy rubber tip everyplace in town has one, hold the carb in your hand firmly, and. Low the living fuck out f the tiny holes repeatedly , and if it has compression and spark it should start if you restarting it correctly. I bet I can get it to start. I own one, it's the most bad ass bike it kit up

Re: 1980 Vespa Grande, no fuel

Just keep priming the hole with mix. Do Not use starting fluid as it will fuck your rings.

Hugh, whats wrong with using a drill and mix to trouble shoot?

Re: 1980 Vespa Grande, no fuel

Hugh Goldspiel /

You mean start it? It's bad for the crank. You're not suppose to over tighten a vespa crank

Re: 1980 Vespa Grande, no fuel

Hugh Goldspiel /

It's not hard to start a bike if you know how

Re: 1980 Vespa Grande, no fuel

Hugh Goldspiel /

It doesn't even sound like you know if the engine is turning over.

Re: 1980 Vespa Grande, no fuel

Blown crank seal will cause it NOT to pull vacuum,hence fuel.Make sure the crank seals aren't blown. don-ohio

Re: 1980 Vespa Grande, no fuel

Ha Ha, don't worry about hurting your crank with a drill Aimee.

Your bike will not have enough compression nor your drill enough torque. to tear out your threads.

It has long been the a practical and accepted method of spinning over a motor to run tests on carbs and ignitions. Accepted that is by veteran wrenchers that is.

Re: 1980 Vespa Grande, no fuel

Watch out for one thing with the drill starter, sometimes when it starts the nut might fly off with the drill attached, don't loose it or the washer if there is one.

Re: 1980 Vespa Grande, no fuel

Downhill Harvey (OFMC) /

cheetahchrome . Wrote:

------------------------------------------------------ > Accepted that is by veteran

> wrenchers that is.

Is the choke hooked up?

Re: 1980 Vespa Grande, no fuel

Bad Cadillac™ /

Still no start even at full throttle?

When you did a carb rebuild, you used a brand new rebuild kit right (new parts)?

Take the plug out, add some gas, put the plug back in and see if it'll start.

Re: 1980 Vespa Grande, no fuel

Hugh Goldspiel /

A vet wouldn't do that because it'll knock your Vespa crank .50 out of true, and you can talk all you want, I worked at a Vespa and repair shop for years, and you would fully yelled and walked away from if you were in front of me. I would never allow even my best friend to use the wrong tool on my bike. That's how you wreck hard to find Vespa stuff fast.

Re: 1980 Vespa Grande, no fuel

Hugh Goldspiel /

Put a new crank seal on

Re: 1980 Vespa Grande, no fuel

Bad Cadillac™ /

I still can't tell if you just cleaned the carb many times, or in fact did a rebuild. If you just cleaned the 30 plus year old carb parts many times, you need to rebuild it instead because you can suspect all 30 year old carb parts including the intake seal. And if you did not rebuild it, it'll never be a reliable machine once it is running.

Re: 1980 Vespa Grande, no fuel

Hugh Goldspiel /

Don't listen to anyone but me. I'm the only one here that worked at a legit Vespa shop.

Re: 1980 Vespa Grande, no fuel

Hugh Goldspiel Wrote:

-------------------------------------------------------

> Don't listen to anyone but me. I'm the only one

> here that worked at a legit Vespa shop.

ok keith bright.

"If your karma score is considerably negative, it is quite likely that a lot of people are rating you negative. You should really consider being a little more helpful and a little less incendiary in your posts."

Re: 1980 Vespa Grande, no fuel

Hugh Goldspiel /

Read my posts word for word... Try it. People will instruct you to damage or break your shit because they think they're the ones who should own your bike. They're jealous. I'm against that, I'll tell you how to fix it yourself without going to a scam artist mechanic .. I have experience

Re: 1980 Vespa Grande, no fuel

I like to hear young peoples ideas and don't just shut my ears to new or different technique.

Hugh, You talk like a 55+ shut in longing for the olden days. Yes you worked at a true Vespa shop in the past. That shop is gone now.

Answer me this: How is turning the motor with a drill going to fuck the crank and pedal cranking not? They both do the same thing.

I guess all vespas cranks are .5 out of true and I bet they came from the factory that way.

Re: 1980 Vespa Grande, no fuel

Hugh Goldspiel /

You'll know what I'm talking about when your crank taper breaks off, or you loose a ton of speed because you tweaked your crank out if true. Then what are you going to do with a bike that has a broken crank? You gonna heat the cases and split them yourself ? Or are you going to give it up to an asshole who will tell you how much it's worth, then turn around and sell it to his white power hipster friends??.. Not me Fucks

Re: 1980 Vespa Grande, no fuel

So I guess this means you can't answer my question. That's ok Hugh, you can sit back down.

Can anyone answer my question?

Re: 1980 Vespa Grande, no fuel

Hugh Goldspiel /

Did you ever true a crank? No? Did you ever construct, a real reed block racing crank? No? Well then shut the fuck up you idiot

Re: 1980 Vespa Grande, no fuel

Hugh Goldspiel /

You're a fool, and a true idiot. I don't care about you. I'd probably fuck you up for talking shit..

Re: 1980 Vespa Grande, no fuel

Your a coward

Re: 1980 Vespa Grande, no fuel

Hugh Goldspiel /

If I catch you sharking on Vespas in my town I'll beat your ass , and everyone will know about you

Re: 1980 Vespa Grande, no fuel

If you would like to come to my town I could skull fuck your mouth while clasping my palms over your ears like carburators to control the suction through your empty head. Would you like that?

Ha Ha. It's weird on your side of the fence huh?

Or I could show you my moped tool collection.

Re: 1980 Vespa Grande, no fuel

Hugh Goldspiel /

Your dildo?

Re: 1980 Vespa Grande, no fuel

You sound intrigued, but no.

Ha Ha I can see there's no more to gleen from your personality so lets say "you win"

Ha Ha

good bye

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