U R A LEGEND I have been working on my scooter for weeks trying to find a vacuum leak and your video led me right to the problem. i'll buy u a beer if you ever come down to tasmania. lol thx again
I really like how you explain that I'm having fuel line issues going up to buy some now hopefully it's the only reason why it will not turn on it's a newer scooter Blaze wolf 50cc hoping like hell it's the only reason it won't turn on now is rotted lines from the heat in Florida hoping so much let me know if you can answer a couple of questions I had about the fuel lines I love the video
Thank you for the details. I have an L-shape tube with a clip on it that came out from somewhere. Do you know where that would come from? I also have a tube that is larger than the others that comes from the side top, on your side, and I can't see where that should go. Can you help?
Great Video, I can use your thoughts getting my brand new Roketa 250 54 B running. Right out of the freight. I added fuel hooked up the battery. Checked all the fluids and all seemed right. Cranked it over never even kicked. Gas was in the filter. Checked the vac to the pump and it wasn't there. I found a complete tree of tees and lines and one open on one tee.. Zip on the vacumm. No diagrams to be had on my new scooter for Vac routing. Liquid cooled semed the way to go but with very little info coming form the supplier. A simple diagram of the Vac system and where everything should be would go a long way to solving my problem. Like I said you video will at least help me locate where some of the tubing should go. Thanks again from NC...
when you have a brand new scooter from the factory like that you have to crank and crank the motor to get the fuel down into the carburetor. It may just be a matter of that. Might try squirting some starter fluid in the carb.
Yes is there anyone that can walk or talk or show me a video of which line goes where from on my carburetor to my gas tank on a 1983 aero 8o cc Honda scooter
does it matter if the inline fuel filter is between the gas tank and the fuel valve or as in my case it's in line after the fuel valve? I'm asking cuz I can't get the darn thing started and I'm at my witch end as to what to do.
I don't have a fuel valve on my quad, am I right in assuming that I should just run the crab and manifold pipes only. As the t piece isn't needed I then assume.great video etc also thanks.
Serious question because the guy working on my bike did this. He ran the tube from the gas tank and conected to the fuel filter and conected the fuel filter to the carb. Then he just pluged up the vacume line with a screw. Is this advisable and is it safe for my scooter?
There is a line that comes down to the rear of my Dong Fang 50cc scooter and there was a little metal screw, somehow that screw came loose now my scooter won't start. What size is this screw and where can I get one?
Thank you for such a helpful video! I just bought a Chinese scooter and though it is almost new, there is a hose hanging out of the scooter that has a plastic nipple. It has a little liquid on the nipple that smells like gas. But I can't find where it plugs in. The scooter seems to run fine. Any idea what this is for? How could it be a vacuum hose and have a little liquid gas on it?
I have one of those 50cc scooters and I bought it broken. I tried to figure out why wasn't getting fuel but I noticed after I saw the video that the vacuum line wasn't connected to the T system and it wouldn't give gas to the carburetor because the T was missing. I'll try fix it when I get home see if it helps. Thanks for sharing this !
I couldnt help but notice your question. I recommend anything 90 unleaded gas or higher. regular gas will kill the engine much more quicklier. I use the highest quality gas because it helps your engine in a long run and... its only 2-4 dollars for a gallon
Besides the vacuum hoses that you explained, there are two other thicker black hoses on my Evo 150cc Taotao scooter. They start off at the right-hand side of the scooter. One of those hoses goes to the front of the scooter's where it is connected to the engine. The other thicker black hose is connected to what looks like a black canister at the right-hand side of the scooter's frame. It is located on the frame between the fuel tank and the ignition high-performance coil box. However, at its end, this thicker black hose (about double the size of the other vacuum lines) is not connected to anything on my scooter and is just hanging by itself. I am suspecting that it is the reason why the scooter is not starting. Also, on the left-hand side of the scooter's frame, there is what looks like another black canister which has two hose connections, one small another one bigger, but then there are no hoses connected to it. I suspect that the lose thicker black hose that is dangling in the middle of the scooter fell off from that. May that be the case? However, I don't want to connect that hose to the black canister on the left side of the scooter because I am not sure that it is supposed to be connected there. So far, I have searched in vain and have not found a TH-cam video with an explanation of the purpose for those thicker black hoses on the scooter. Are they part of the scooter 's vacuum system? Please advise. I look forward to hearing from you. Your explanation will be highly appreciated.
I wished that you made your video close up. It is difficult to determine and distinguish the lines. Also, you could have a bright light, so everything was well seen. You have made a great video, but please if you can make another one with better details. Thanks.
I want to know I filled my moped up with gas at the gas station it was running fine on the way down there but when I got ready to leave the gas station it would not start no more can you tell me what could be wrong
Hey man I have a problem with my scooter. It starts fine and runs fine but after 10 or 15 if you stop in a light (example) when you hit the gas it shuts off and wont turn on again. If you wait about 30 minutes for the engine to cool off it will start again. The engine chokes when you hit the gas it make a sound like pou pou. its a joneway 150 cc 2011 Any Idea????
I am having problems with the under side fuel tank were do they go one is the fuel line the small one beside the fuel line is it a vacuum pipe which goes on the bottom of the carb then there is two out let's side by side were do the pipes go please.
i put on a new carb new intake manifold auto choke fuel filter and fuel diaphragm.went to start it today and now there is no gas going to through the diaphragm the vacuum lines r good replaced them to,but when i turned the fuel filter to a vertical position fuel went tin tho the carb and started ran for a few seconds and shut off.obviously there is no fuel going through the diaphragm,do they go bad fast?thats the only thing standing in my way of getting this thing running.i dont wanna hafta
.i dont wanna hafta get another diaphragm cause i just put in on a fe weeks ago.anything else that could be causing no fuel gettting in? any ideas at all would help,thanks
I have an Eton beamer I'm not getting gas to my fuel lines what could the problem be??? please help. new fuel lines,carb cleaned, gas tank cleaned still no fuel in my lines. I have an electric thing attached to my gas tank that goes inside could that be the problem please help
Thank you for the video. Bought a basket case with lots of lines unplugged, etc. Was finally able to start it once I watched this. Though I have a long way to go to see it running stable, I at least can start. Any videos on tank removal?
I have found those diaphragm carbs to be so unstable in holding an idle , that I will not work on them anymore. I wish they built them more stable. Great vid, buy the way and no disrespect. RH DS
@suecarman Hi my scooter leaks gasoline but i always find a puddle of gasoline beneath the carbeurator i do not find any leakage on hoses. my scooter has 1600miles i purchased it Used as a third owner at 500miles. its been leaking for 1100miles
my scooter was running fine until it started "dumping" gas into the carb. In order to get it back running i have to pull the gas line aloose. when i do have it running then i have to pull the vac line off the petcock otherwise it just floods out again. please help
Viewed your video. My icebear mojo 150cc. Keep shut off at dangerous spots. So after the views I looked at my hoses. Must appear fine maybe have to move fuel filter it on front side of pee cock not on line right off tank. But as I was looking at lines, just in front of the manifold on nose of engine there was a line that was crimped. So I fixed it, but it runs from to nose of engine to a splitter one line goes to the air filter and then another line goes to the backside of of motor housing I guess that would be wear the belt is located? . Wish I could send photographs and video to explain better. On my bike I have a foam air fitter. So the hose from above is just tucked under a top layer. Hope you can understand me.
John I think your scooter is idled to low. Take s butter knife or screwdriver and crank the idle screw on the carburetor clockwise. Once you have a good idle speed sound from the motor, keep it their- if it holds to powerful turn it back down- but not to much where it stops at lights or other places when you let go of the throttle. Another thing it never starts back on time - idle was never turned up.
Or do it the easy way like I did connect the fuel line directly to the carb and by pass the petcock silver disc that is a complete piece of garbage for fuel. Leave the vac line hooked up to the silver disc.
I have one line I cannot seem to find where it goes. I have attached a picture. It comes off the bottom of the plastic pan that is right under the fuel filter. The other end is just hanging loose and has a clamp on it so it must connect somewhere? Thank you! www.dropbox.com/s/9drv9dl0zwrbhc4/2017-09-02-PHOTO-00018125.jpg?dl=0
I need help can't get my 127cc Yinxaing motorcycle started I just charge battery and still no luck I try everything I can think of what to do i can send you a video of me trying to start
I'm having problems with mine too but it's not this. If yall have time please check out the video I just posted on my channel about my scooter not running right and see if yall know what's wrong with it. THANKS!
… Seeing each year model of scooter is slightly different, and have different vacuum lines, other than what is seen here, It would be good to make a video on each and every model of Vino scooter, as the service manual, doesn't cover the hose hookups properly (if at all). So-far, going through the service manual for a 2004 150cc, scooter, I haven't found any explanation regarding both either fuel line hookup's, or where each vacuum line is to be connected to the carb. Except for the fuel system (like the one shown here), other vacuum lines are present on a 2004 Vino, that should be covered, for proper connection. Yamaha should have made a diagram, showing each and ever vacuum, and fuel line hookup in it's manuals (after all, the service manual is for the Yamaha servicemen to refer to, when needed). It's very disappointing, that not all the required facts are supplied in it's service manual, that a serviceman, or customer, require to have on hand written in the manual. I sure would like to watch a video, showing all the hose hookups on a 150cc., 2004 Vino, otherwise, most of the vacuum hookups are a guessing game, hoping you made the right choice, on where to hook them all up. I contacted a Yamaha service dealer about this matter, and they had no clue either, on which hose is attached where. They had the same service manual I have here ( and again, hose connections are not shown anywhere in the manual. Any chance of having a video made concerning this full issue?
3:24 "If it is a dealership scooter this has probably already been checked and replaced" BULL S@#%.... Some scooter re-seller is not going through the trouble to replace the hoses or upgrade it (with out charging you). China scooter QC issues as super bad are rumors. Likely all those vacuum hoses were correctly installed and adequate quality. If it does not run or run's poorly then investigate. I have bought two China made scooters. Both ran out the box with the normal oil change after about 30 min (before the 150 miles they recommend). I also adjusted valves early as people warn, at about 100 miles, I found they were pretty close. I'm fairly impressed with the quality you get for under $1000.
![No more vacuum fuel pump problems! GY6 Won’t start: FIX! [PROBLD PULSER UNIT]](http://i.ytimg.com/vi/I_k3jgNswCU/mqdefault.jpg)
Thank you for the video. I was replacing the fuel lines and realized I came up short a section of line - with your help I figured out the puzzle.
This dude is the best I've even seen y'all pay this man please Thanks my brother
Wow finally a clear explained video
Excellent video. I only wish more people would take the time to what you have done.
awesome!!! i have been looking for this for a wile and this is the only video i could find to help me hook the carb back up to my scooter, thanks
Best scooter tutorial video I've seen yet! Awesome job.
I have just been given a scooter where all these fuel and vac lines are missing. So thank you sir... might get it running now!
i know it is kind of randomly asking but does anybody know of a good site to stream newly released movies online ?
@Gideon Walter I watch on Flixzone. Just search on google for it =)
@Gideon Walter I would suggest Flixzone. You can find it by googling =)
U R A LEGEND I have been working on my scooter for weeks trying to find a vacuum leak and your video led me right to the problem. i'll buy u a beer if you ever come down to tasmania. lol thx again
Jesse James let me guess, faulty hose clamp coming off the intake manifold? i think thats my vacuum leak issue. lol
I don't drink beer but I could use a hand she me some pictures of we're the fuel lines and vacuum lines go on a 500 suzuki street bike 2008 model.
Hey fellow tasmanian, I can't get my scooter running haha
Great simple video, sorted me out right away, thank you!
my thoughts exactly.
Best scooter tutorial video I've seen yet! Awesome job.
Good demonstration.
I really like how you explain that I'm having fuel line issues going up to buy some now hopefully it's the only reason why it will not turn on it's a newer scooter Blaze wolf 50cc hoping like hell it's the only reason it won't turn on now is rotted lines from the heat in Florida hoping so much let me know if you can answer a couple of questions I had about the fuel lines I love the video
Thank you for the details. I have an L-shape tube with a clip on it that came out from somewhere. Do you know where that would come from? I also have a tube that is larger than the others that comes from the side top, on your side, and I can't see where that should go. Can you help?
I agree with Boogie, suecarman Made a great instructional video. Props to you suecarman !!!!!!!!.
Clear and precise. Thankyou
Thank you sir, that tutorial just educated me some what 👍👍
Thanks man👍👍👍
We have all the hoses attached but it will not run unless you squirt starter fluid. It's only 2 years old
love you man for the tutorial
Great Video, I can use your thoughts getting my brand new Roketa 250 54 B running. Right out of the freight. I added fuel hooked up the battery. Checked all the fluids and all seemed right. Cranked it over never even kicked. Gas was in the filter. Checked the vac to the pump and it wasn't there. I found a complete tree of tees and lines and one open on one tee.. Zip on the vacumm. No diagrams to be had on my new scooter for Vac routing. Liquid cooled semed the way to go but with very little info coming form the supplier. A simple diagram of the Vac system and where everything should be would go a long way to solving my problem. Like I said you video will at least help me locate where some of the tubing should go. Thanks again from NC...
when you have a brand new scooter from the factory like that you have to crank and crank the motor to get the fuel down into the carburetor. It may just be a matter of that. Might try squirting some starter fluid in the carb.
thank you for showing all the lines connected to carb all mine were missing rotted
Yes is there anyone that can walk or talk or show me a video of which line goes where from on my carburetor to my gas tank on a 1983 aero 8o cc Honda scooter
my fuel filter is on the opposite side of the fuel valve. does the fuel filter need to be first out of the tank?
Extremely helpful
does it matter if the inline fuel filter is between the gas tank and the fuel valve or as in my case it's in line after the fuel valve? I'm asking cuz I can't get the darn thing started and I'm at my witch end as to what to do.
I don't have a fuel valve on my quad, am I right in assuming that I should just run the crab and manifold pipes only. As the t piece isn't needed I then assume.great video etc also thanks.
On the gy6 Carb I found a false vacuum port cap on my carb that runs to that infamous t-line.
Serious question because the guy working on my bike did this. He ran the tube from the gas tank and conected to the fuel filter and conected the fuel filter to the carb. Then he just pluged up the vacume line with a screw. Is this advisable and is it safe for my scooter?
You the best
Do i also need to clean the EGR canister?
Thanks. Nice video.
(EGR is, more properly exhaust gas recirculation instead of recycling.)
Hello I was wondering if you can tell me more about the little silver box that oil goes into then goes into the motor on a 1984 honda spree
There is a line that comes down to the rear of my Dong Fang 50cc scooter and there was a little metal screw, somehow that screw came loose now my scooter won't start. What size is this screw and where can I get one?
Thank you for such a helpful video! I just bought a Chinese scooter and though it is almost new, there is a hose hanging out of the scooter that has a plastic nipple. It has a little liquid on the nipple that smells like gas. But I can't find where it plugs in. The scooter seems to run fine. Any idea what this is for? How could it be a vacuum hose and have a little liquid gas on it?
I have the same question
I have one of those 50cc scooters and I bought it broken. I tried to figure out why wasn't getting fuel but I noticed after I saw the video that the vacuum line wasn't connected to the T system and it wouldn't give gas to the carburetor because the T was missing. I'll try fix it when I get home see if it helps. Thanks for sharing this !
I couldnt help but notice your question. I recommend anything 90 unleaded gas or higher. regular gas will kill the engine much more quicklier. I use the highest quality gas because it helps your engine in a long run and... its only 2-4 dollars for a gallon
Great video brother
Besides the vacuum hoses that you explained, there are two
other thicker black hoses on my Evo 150cc Taotao scooter. They start off at the
right-hand side of the scooter. One of those hoses goes to the front of the
scooter's where it is connected to the engine. The other thicker black hose is
connected to what looks like a black canister at the right-hand side of the
scooter's frame. It is located on the frame between the fuel tank and the
ignition high-performance coil box. However, at its end, this thicker black
hose (about double the size of the other vacuum lines) is not connected to
anything on my scooter and is just hanging by itself. I am suspecting that it
is the reason why the scooter is not starting. Also, on the left-hand side of
the scooter's frame, there is what looks like another black canister which has
two hose connections, one small another one bigger, but then there are no hoses
connected to it. I suspect that the lose thicker black hose that is dangling in
the middle of the scooter fell off from that. May that be the case? However, I
don't want to connect that hose to the black canister on the left side of the
scooter because I am not sure that it is supposed to be connected there. So
far, I have searched in vain and have not found a TH-cam video with an
explanation of the purpose for those thicker black hoses on the scooter. Are
they part of the scooter 's vacuum system? Please advise. I look forward to
hearing from you. Your explanation will be highly appreciated.
This is the 4th video I've seen you post this on
try it bro
Nice. Thank you!
Thank you. Very helpful !
So where does that hose you have hanging over the side panel go ?
I wished that you made your video close up. It is difficult to determine and distinguish the lines. Also, you could have a bright light, so everything was well seen. You have made a great video, but please if you can make another one with better details. Thanks.
I need to learn how much ethanol is in Chinese, Korean, Japanese gasoline. I am going to start using ethanol free gas to prevent hose damage.
Thank you so much for your video! You rock!
I just got a 2008 sl50qt-7 is there any way to delete or find a diagram of how the fuel and vacuum lines goes to the charcoal canister
Riley s
I have as they say a 2013 Bash I go to start it up and it starts but it doesn't go once i pull the accelerator it turns off
can disable the auto choke?
What about the canister on the left side
FYI: Fuel and vacuum HOSES are flexible. Lines are steel or copper.
I want to know I filled my moped up with gas at the gas station it was running fine on the way down there but when I got ready to leave the gas station it would not start no more can you tell me what could be wrong
if I'm not getting any fuel in the gas filter dose that mean me gas line is pluged?
well put! thanks for posting this!
could you show the canister routing for egr!!??? thank you again
This is confessing b s right beautiful
Hey man I have a problem with my scooter. It starts fine and runs fine but after 10 or 15 if you stop in a light (example) when you hit the gas it shuts off and wont turn on again. If you wait about 30 minutes for the engine to cool off it will start again. The engine chokes when you hit the gas it make a sound like pou pou. its a joneway 150 cc 2011
Any Idea????
I am having problems with the under side fuel tank were do they go one is the fuel line the small one beside the fuel line is it a vacuum pipe which goes on the bottom of the carb then there is two out let's side by side were do the pipes go please.
John Perdomo
On a cbr 125cc 2004
i put on a new carb new intake manifold auto choke fuel filter and fuel diaphragm.went to start it today and now there is no gas going to through the diaphragm the vacuum lines r good replaced them to,but when i turned the fuel filter to a vertical position fuel went tin tho the carb and started ran for a few seconds and shut off.obviously there is no fuel going through the diaphragm,do they go bad fast?thats the only thing standing in my way of getting this thing running.i dont wanna hafta
where do i get one of those t-interjections?
.i dont wanna hafta get another diaphragm cause i just put in on a fe weeks ago.anything else that could be causing no fuel gettting in? any ideas at all would help,thanks
I have an Eton beamer I'm not getting gas to my fuel lines what could the problem be??? please help. new fuel lines,carb cleaned, gas tank cleaned still no fuel in my lines. I have an electric thing attached to my gas tank that goes inside could that be the problem please help
Tim ever fix it?
What gas do you use for your moped
Got diagram for this and wiring?
Thanks man
i have two ground wires from the battery and one green i cant remember where they go can you help me
can u make a video on how to remove the Egr system, there is no videos on that
Mad Maxx
Brendon May
thanks but i sold my bike like 1 yr. ago
if you run the fuel line straight to the carb will that affect the vacuum line from the intake?
If you remove the stupid vacuum petcock with a simple on off switch you can block off all the vacuum lines and never have an issue
Thank you for the video. Bought a basket case with lots of lines unplugged, etc. Was finally able to start it once I watched this. Though I have a long way to go to see it running stable, I at least can start. Any videos on tank removal?
Wow, are you a retired rocket scientist??
And we bought a brand new carburetor for it and put it on properly
I have found those diaphragm carbs to be so unstable in holding an idle , that I will not work on them anymore. I wish they built them more stable. Great vid, buy the way and no disrespect. RH DS
when i disconnect the pipe above the fuel filter no petrol will come out ? is it the vacumn line or is the tank blocked and how can i fix it ??
@suecarman Hi my scooter leaks gasoline but i always find a puddle of gasoline beneath the carbeurator i do not find any leakage on hoses. my scooter has 1600miles i purchased it Used as a third owner at 500miles. its been leaking for 1100miles
Thank You.
great vid! i feel more confident on what hoses are what now, thanks!
Great vid clear as dayyyyy
No one mentions the line with the spring around it?
my scooter was running fine until it started "dumping" gas into the carb. In order to get it back running i have to pull the gas line aloose. when i do have it running then i have to pull the vac line off the petcock otherwise it just floods out again. please help
Viewed your video. My icebear mojo 150cc. Keep shut off at dangerous spots. So after the views I looked at my hoses. Must appear fine maybe have to move fuel filter it on front side of pee cock not on line right off tank. But as I was looking at lines, just in front of the manifold on nose of engine there was a line that was crimped. So I fixed it, but it runs from to nose of engine to a splitter one line goes to the air filter and then another line goes to the backside of of motor housing I guess that would be wear the belt is located? . Wish I could send photographs and video to explain better. On my bike I have a foam air fitter. So the hose from above is just tucked under a top layer. Hope you can understand me.
John I think your scooter is idled to low. Take s butter knife or screwdriver and crank the idle screw on the carburetor clockwise. Once you have a good idle speed sound from the motor, keep it their- if it holds to powerful turn it back down- but not to much where it stops at lights or other places when you let go of the throttle. Another thing it never starts back on time - idle was never turned up.
i need a help on my yamaha majesty 250 scooter can any one please tell me how can i open his fuel box or how can i insert the petrol in it plz help me
Clear
what is the line hang off the side not connected to anything
Have you gotten an answer to this? Just received a scooter today and see that blanked off line as well.
its an overflow. incase scooter is tipped or too much gas in carb
jay Tarantula
Any Idea where the line that connects to the top of the gear box goes?
nnnnnnniiiccccceeeeeeeeeee thank you so much
With the exception of the fuel vacuum lines, rip everything else out, you don't need them. 🤪
i need help with my 2008 SL50QT-7
Or do it the easy way like I did connect the fuel line directly to the carb and by pass the petcock silver disc that is a complete piece of garbage for fuel. Leave the vac line hooked up to the silver disc.
I have one line I cannot seem to find where it goes. I have attached a picture. It comes off the bottom of the plastic pan that is right under the fuel filter. The other end is just hanging loose and has a clamp on it so it must connect somewhere?
Thank you!
www.dropbox.com/s/9drv9dl0zwrbhc4/2017-09-02-PHOTO-00018125.jpg?dl=0
this is a longbo LB150T :P just bought one a week or so ago.
mine back fires then dies so i have to let it sit for a minute then i can start it up and it don't want to start
i removed all those hoses all wast of space
This is hard to follow, you need closer camera angles. I've got vacuum lines I can't tell where they go because I can't see where you're pointing
can I remove the egr canaster
I need help can't get my 127cc Yinxaing motorcycle started I just charge battery and still no luck I try everything I can think of what to do i can send you a video of me trying to start
Thanks
I'm having problems with mine too but it's not this. If yall have time please check out the video I just posted on my channel about my scooter not running right and see if yall know what's wrong with it. THANKS!
The under side of a cbr 125 honda motor bike 2004 fuel tank one to the carb the other two out lets
You didn't even cover the EGR canister routing.
Like your channel but your Vit your video audio your audio is really badI had to turn off my sound system extremely high
Can I bring my Chinese junk Tao Tao 50 to ya?
so i have a hose coming from the kick start, where the heck does it go
Perry Round 1 by KO
… Seeing each year model of scooter is slightly different, and have different vacuum lines, other than what is seen here, It would be good to make a video on each and every model of Vino scooter, as the service manual, doesn't cover the hose hookups properly (if at all). So-far, going through the service manual for a 2004 150cc, scooter, I haven't found any explanation regarding both either fuel line hookup's, or where each vacuum line is to be connected to the carb. Except for the fuel system (like the one shown here), other vacuum lines are present on a 2004 Vino, that should be covered, for proper connection. Yamaha should have made a diagram, showing each and ever vacuum, and fuel line hookup in it's manuals (after all, the service manual is for the Yamaha servicemen to refer to, when needed). It's very disappointing, that not all the required facts are supplied in it's service manual, that a serviceman, or customer, require to have on hand written in the manual. I sure would like to watch a video, showing all the hose hookups on a 150cc., 2004 Vino, otherwise, most of the vacuum hookups are a guessing game, hoping you made the right choice, on where to hook them all up. I contacted a Yamaha service dealer about this matter, and they had no clue either, on which hose is attached where. They had the same service manual I have here ( and again, hose connections are not shown anywhere in the manual. Any chance of having a video made concerning this full issue?
3:24 "If it is a dealership scooter this has probably already been checked and replaced" BULL S@#%.... Some scooter re-seller is not going through the trouble to replace the hoses or upgrade it (with out charging you). China scooter QC issues as super bad are rumors. Likely all those vacuum hoses were correctly installed and adequate quality. If it does not run or run's poorly then investigate. I have bought two China made scooters. Both ran out the box with the normal oil change after about 30 min (before the 150 miles they recommend). I also adjusted valves early as people warn, at about 100 miles, I found they were pretty close. I'm fairly impressed with the quality you get for under $1000.
Drink a couple of red bulls and get a lapel mic.