No-start, Lean condition: 50cc Scooter -Part 1 

put the choke solenoid on the bench on white paper mark a line at the end of the needle. connect 12v to it the needle should move either in or out if not it is shot.

I'm fiddling this little buzzers since 13 years old,being 38now. They are so much fun. :)) Glad to see you in to them.

The way those auto chokes work is when the bike is cold the choke plunger is fully retracted which is on. when the bike is started the choke is supplied with AC current which then makes the plunger slowly extend out to turn off the choke passage. thats why you didnt get any power to it because otherwise if you left the ignition on for a while a cold bike would be hard to start. The choke would even work unplugged so long as the bike is cold.

Great video! I just learned some stuff I've been thinking about for 20 years. Thank you

Very good video! You are very informative and articulate. Keep making videos👍👌

If you put the filter back on , it will give you the resistance of air you need to maintain the mixture. All these Small bikes mainly run off the magneto, the battery is for starting. Be careful not to run a 2stroke for too long on starting spray, as they need oil in the mix.

Nice, i love working on these small systems when i have the opportunity, although they can be tricky sometimes, but overall fun, like putting a small puzzle together

This is so interesting for a complete novice to watch. Mechanics should really get paid a lot more than they do because without them no one would be able to get to work and make their own paycheck. You made this so newbie friendly and this is something that Ill know how to check on my scooter if it ever presents these symptoms and it might save me a trip to warranty work.

Solid troubleshooting, on to part two!

I had this on a J range Lambretta, turned out to be a block fuel tank filter situated inside the tank, was hacked up and was blocking the carb repeatedly..

That was different and fun to watch best of luck

Excellent -- learned a lot-- Parts 1 and 2.. Very well done and explained.

Nice deductive thought process Ivan. I got a little chuckle when you said, "There's something definitely wrong."

excellent info I learned about my tao tao 50 scooter! Wish you could come and repair mine, you're great. Found the replacement fuel pump on Amazon! Can't wait to get my machine running again!

Fun to watch and informative as always Ivan. I love that two stroke sound. Watching this reminds me, I've got three carbs to clean. The Hot Rod Minibike carb, trimmer carrb, and mower carb. It's a yearly ritual even though I religiously use StaBil.

Ivan, those 2-stroke engines will have starting and running problems after a long stay without using. That is because the lubricating oil will clogg in the carburator and choke, so one have to clean the carburetor for sure. The same counts for the old 2-stroke of my boat. Succes.

Hi Ivan, I am an auctioneer, in the past few years I have sold several of those Asian scooters, none had more than a few hundred miles, none ran, so this one is par for course. Nice to see ya tryin to make this one run, Thanks

i have a slightly different varient of that scooter, 2007 model - 2 stroke - you have to hold the brake lever while pressing the starter button... also I let mine sit for a long time (6 months ish) and it was pretty hard to start even with electric starter - had to use some spray in the intake to get it running, but after tweaking the idle screw a bit and running it every day for a couple days it starts first pop

Great introduction on how to ? Much was learned 👍

nice running too lean diagnostic trick with the hand over the carb mouth. :)

Bravissimo, bel video sia prima che seconda parte, inscritto naturalmente :)

Actually the automatic choke doesn't work how you're describing it. It's not really a choke at all. Before you start the scooter an enrichment circuit that allows extra fuel through the carb is open. When u start the scooter the auto choke slowly drops down a needle which eventually plugs the circuit. So if the engine isn't warmed up by riding it before that needle finishes dropping the scooter will die, especially if you don't have an air filter on like yours, the air/fuel ratio will way out of wack

Those jets in those little carbs plug up like clock work especially with corn fuel . Replace the jets and if the owner is going to let it sit get real gas for it and throw in some Techron . TheReaper!

Speedometer looks similar, would bolt up to my 2003 MZ Moskito SX, however I guess they were junk seeing as how the one on that TGB Keywest went bad a little faster than mine. Ill probably remove the trim holding it and get something digital bolted up to a nice new handlebar.

it is a coild that heat up a termal element and lift a needle or drop it down.and it does not get power from bat but dynamo

Almost spring, it's almost summer here in AZ.

I had a full size car battery in the helmet box, jumping over speed bumps smashed the cold start thing off, I used to just put my thumb over it😊❤️🇬🇧

Actually the automatic choke, AKA, the enricher heats up and pushes a plunger that pushes a needle that closes a port. Search for "testing enricher" and you'll see how it works.

hi thanks for answer ,its a brand new carb .should i try still try to jetted , if do can you show me how ?thanks

Great video buddy

I see this is vid #1...But i'm going to drop my comment now. Many of these have a vacuum operated fuel pump to fill the carb bowl. Old fuel and varnish may have clogged the ports. It may not be connected/missing. Passages within the carb itself may be plugged with varnish as well. Most have a 3 jet fuel metering system, idle jet, part throttle jet, Main jet. Clean all of them. Along with ALL the fuel and air passages within the carb body. Replace the fuel pump if it had one. Check the crank case half's for air leaks - if applicable. Reed block to case leaks as well. Replace the choke coil - low buck item. Clean ALL the old gas from the tank,brakleen it. If it has an oil pump to feed pre mix oil -don't use it. Run with oil in the main tank mixed yourself. Set up the idle mixture and it should run like new 1st kick every time. New spark plug will help with that...... My scoot was given to me. It's 15 years old, sat for years with nasty gas in it. An Italian bike better quality overall than the Asian imports.Went over it top to bottom, it runs like new even with 4k miles on the cylinder 55 + mph after tweeking.

hello Ivan how did you figure the carborator vs a big air leak?

what you do? my scooter start but don't want to stay on what should I check on first?

Haha Ivan, you can add Golden Bee Ltd. scooter to your resume :)

When I was around 15 my neighbor had a 50cc Yamaha scooter that wouldn't start. I verified it had spark and enough fuel so the problem turned out to be that the fuel bowl had deposits in the jets so I cleaned it out and it started right up.

I've got 90cc dismantled, with some of its parts in a box although im not an specialist I know I didnt get all the parts and I can't get it to run especially I believe that I got some sort of connecter missing that must be pretty closed to the battery and coonected to the CDI. any idea what could it be?

I will guess and say either crank seal or gasket between cylinder and reed valve.

Where is the check engine light and data link connector , lol . Kinda curious to see the inside of the carb . I think that thing lets fuel go through it until warm then closes . Sounds like it is only getting fuel through the Enrichner till it closes and then not getting fuel through main jet .

Hi man, have you experienced fixing 2 stroke 50cc scooters that when not warmed up from hours of not being used or from coldstart every morning, it will bog down on 1/2 to full throttle if i use it straight away? But when i warm it up for 10mins it will be fine to use with no bogs. It's a pain if your in a hurry. Seen some scooters and they seem to just ride it straight away. Would that be issues with not enough fuel on carb or float bowl? Changing needle clip position? Or any other? Thanks man for any help.

Thanks man. Much appreciated

put the air cleaner back ..put all the hose to all to its original hole..to make the electric start work u have to press the brake while pressing the start buttton.

Great diag, but these things stock jetted notoriously run like shit without the air box restriction, I am confused by the crazy effort but excited to see the conclusion.

Oh my god this is the answer I think he just said my exact life story at the begging I really hope it’s the same problem

question: how did he get it to you?

Next on the list, the good ole Honda 50cc, the only model with external heating capacity. It achieves this extraordinary feat by catching fire to the engine enroute to your destination. A piece of clothing can be used as a fire extinguisher to quell the flames without ever having to reduce speed. God be with the days.

Super interesting dude

Can you imagine the look on the salesmans face when A guy wheeled this thing in wanting to trade it in. Haaa

tell me that electric choke is not my problem there a wire that is unplug but don't know where it go to?

Sad to say, as someone who does local small engine repair, I now find that it's easier once the carb is isolated as the problem just to buy a new one and swap it out. It's easier and less expensive than buying a rebuild kit, pulling it apart, dropping the needle valve, losing the float pin, etc... not to mention labor. I've gotten it down to a science: 1. Isolate fuel as problem 2. Buy new carburetor 3. Install carburetor 4. Profit Also, I just want to run this by someone else to make sure it sounds right: My lawn tractor (sounds manlier than garden tractor) has an electromagnetic PTO clutch, which has been acting fucky for about a year. The engagement points are fine- they aren't worn down anywhere near where it would warrant replacement- so the conclusion I came to was that somehow I had lost some of the windings in the magnet. Question 1 is is this possible, question 2 is how would one go about testing such a hypothesis? The only thing I thought of so far was to check resistance and compare it to a new one... Sorry for asking such a boring, basic question. Unfortunately, is about as interesting as it gets in upstate NY for a sophomore in high school. Fortunately I got a job this summer at a nearby garage... maybe next summer I'll see if Eric over at SMA could use a shop bitch haha

I just bought a 2007 model, the battery was dead, I’m charging it right now, connected a lawnmower battery to it and have the oil light on!!! What does that mean and how do I solve this problem?

Hello there, I have a 50cc Chinese scooter with only 23km on it. Over the winter something very strange -to me - happened and have no idea what it could be. When I start the bike and press the breaks lever as required for it to start - it accelerates the bike and the tire starts spinning? But when I use the accelerator the tire does not move at all- Any ideas?? I checked the accelerator cables but all seems ok? Any idea what I would need to check. Thanks!!

Great Job!

Thks four your excellent video I have a Piaggio Zip 50cc 2T everthing fine till a teck 3 weeks holiday when I’m came I try to start the scooter is hard to start so is ok now when I try to drive is not accept the acceleration any help please thank you very much

iff all electric is okand carburetter is ok choke etc is ok.it can be main bearings or seals in engine bottom.the choke uses a little time for it to move so what you did is not a test of choke.you aply power direct to the choke and wait for15sec or so to se it moves and get varm to hold.

Make love to that carburetor brother, (11:00) great video.

I wonder if the tank vent is clogged or closed

Need to hold the brake and the electric start would work

There is a vacuum line running from the carb to a fuel regulator. Could be cracked

My does the same thing yours is doing and my battery is dead from messing with it .... I wish I had someone to come fix mine

the idle jet is blocked?

Check for plugged carb vent line, common hideout for bug nests. Venting issue.

its not supposed to click the solenoid on the carb. its supposed to move in slowly when power is applied. the auto choke is choking the carb when the engine has been off for a while and slowly un chokes after its been started.

It's not a traditional solenoid though, it has a wax and an element in it and the wax is heated up when given current causing the hole to be blocked.

2 minutes in I am thinking dirty carb, pull it off and clean the main jet, and check fuel supply to carb.

Loved your diagnostic routine: like me on my Ford Ranger. Where is a good place to buy scooter parts online? I am in the middle of nowhere just like you. Thanks.

dirty carb lean give it more fuel. what was it?

Hey man where does that hose of the exhaust go

no air filter ?

Hold the left brake lever then start with the button.

Good vid!! Subbed! I've a 2 stroke Minarelli engine Buddy 50 scooter. It has a hard time starting - wants to start via the starter and dies UNLESS I open and hold the throttle wide open for awhile - then it runs ok. Battery and plug appear ok, plenty of fuel. What's the problem and the solution, please? (Anyone with an experienced solution can answer) Many thanks!

nice PA. I live in near Lancaster PA

Got one that gas keeps getting in oil never could get it to start be fore gas went into oil what would it be .it fireing but still would not start

The problem was a straight forward issue with the carburetor. All of the scooters you have to press the right or the left lever to start the engine. Don’t need to do an electrical diagnostic in my opinion.

hi my name is joe , i have a taotao 50 cc ,i had problem it want started , i replace the carb it started but it wasn't working good tryed to adjust the mixter scruze i have it all way in and s and still no good it shots off , im cheking the plug and is black ,so im assumming is to rich ,should i replace the pilot jet with a smaller one or somithing else .thanks in advance

hi my name is joe i have taotao 50 cc scooter wont start e replace the carb is running now but when i put it on the street and i open it up it don"T go fast after half trattol sound like it getting chock up and at full trottel the rpm dont came up ,any think i shoul do thanks in advance .

Adjust your throttle knob on carburetor or clear valves in carburetor or clean the carbon off the valves in engine head. You may be loosing compression.

hmm Vapor lock? My bike gets it ..if I open my gas tank lid ..it goes away

My scooter is peace sports 50cc scooter. When I hit the brake on the grip and try to start the scooter the fuel gauge goes down and it will not start. Can someone help me.

the choke does not click.

Where is part 2?

Link for the wiring diagram please

im so happy i just got a 150cc scooter for trade for a walmart pellet gun and $75

I,Now i am watched this video and Now i am subscribed!

Hum interesting for sure , Scotty would have said you should have bought a Yota. LOL

I would say 90% of all small engine problems are caused from dirty old gas issues .

can you take it out of gear while its running?

You have to hold the break on a scooter then push the starter

Okay Ivan confession time. How tempted where you to go for a spin and pop a wheelie? I willl have to have a look for these next time I am at the Chev dealer...lol I find that really odd that the fella got this scooter there, I know dealers take some weird trades but this would take the cake if that was the case. Maybe it was their lot vehicle.

Any specs or even hints on setting the float correctly? I've looked and looked, but nothing anywhere, every how to video just shows disassembly and reassembly, no verification of float level. Any idea how to check if it's correct?

When you use the kickstart you also have to hold the left handbrake !! With key and switch turned on too. Maybe you knew that.

Tgb for life🤘🏻

should it smoke? you don't mix gas and oil in that do you?

Ia a TGB brand 🤔

How do I turn off my bike I have no key ignition I turn it on with kickstart but don’t how to turn it off !???????????? My bike is the same as yours . How can I turn it off if my kill switch don’t work like yours it’s broken and it’s starts with kickstart but idk how to turn the motor off and turn it back on with no problem ? Please help would glaldly apreaceate ..

Just keep the electric choke unplugged and problem "solved" haha

Hey i need to know to kick start My scooter when I try to kick start it the kick pedal won't move.

My 2017 Tao Tao 50cc does the same thing.

Hi there, based on your workings and my issue being the opposite symptoms, my starter choke solenoid must not be working. as mine wont idle and is near impossible to start when cold but when warm it s fine,

The “solenoid” isn’t that It’s actually a heated plunger with wax so when it gets 12v it warms up and closes the enrichment. Reason you have 2 earths? Well you’re earthing thru the charge coil at the stator... so it’s really just an alternator and the “solution” is pretty much the alternator light?! Well it gets 12v only when running

Diaphragm in carb got a hole in it or perished