This is one of the best "carb tuning for dummies" videos l've seen so far. I would assume this would also apply to 150cc engines as well (except the jet sizes will be larger).
I appreciate all the work you put into this video. I'm a novice trying to get a scooter running for my college-bound daughter. Thank you for explaining it so well!
This has honestly been the best video I've ever seen on carburetor adjustment. all about the practical application, doesn't overload me with scientific mumbojumbo that I'll never use, and really makes understanding the concepts and applications of carburetor adjustment palatable for the common wrencher.
One of the best explanation of jetting a small scooter motorbike Carb... Your explanation and graphics confirmed and reinforced my understanding and tuning techniques. .
I’ve seen lots of videos on carb tuning but this one is by far the best. If someone finds this hard to understand they need to watch it about five times.
I always had a rule about carburetors: Don't Touch!!!! Since mine decided to get clogged and had a few things go screwy on it, I had to break the rule. Glad to have found this video. REALLY needed the info. Thanks.
This is the best tutorial I've found so far. Been google searching how to tune for the 80cc big bore kit I installed and every google search is like people trying to protect some kind of international secret.
That was about the Best explanation with awesome diagrams on how CV carbs work whether big or small!! How about one on a 4x CV carb setup :) :) Two BIG thumbs up man!!
My scooter was bogging down alot after his vid i adjusted the vacuum needle and it works fine. Your the man excellent help from you Thankyou so much 👍🏻👍🏻
You sir, are a brilliant teacher. This is crisp, fast, easy to understand and I am grateful and confident I’ll soon have my scooter running perfect. Thank you!!!
Update: After applying the method described, plus a valve adjustment, my scooter starts immediately, idles perfect both cold and hot, does not smell and pulls strongly on all speeds.
Man this is the best information filled video I have seen you make it very easy to understand and has a lot of writing to go back and pics to double check while fixing my bike awesome and actually works 👍
Excellent tutorial.... very clear and informative. I have watched several other videos explaining separate parts of the whole 'tuning puzzle' but this is the first complete and concise version I have found. Thank you for sharing...... it has helped me alot!
Best presentation and explanation of the options and interactions I've seen! And I've been watching a lot of vids now as trying to get my scooter running again! And last few times I rode it--after a "professional" tune up--it ran shitty. Until seeing this video, I was just worried about cleaning the carb & making sure the jets weren't blocked! Checked my jet sizes (35/88), so all makes sense it was running too rich! (It had ran well for the first few years I got it from the dealer, so really suspect the intelligence of the guys who last worked on it) So glad I'm finally teaching myself how to take care of it and a video like yours satisfies my engineering background and the hands-on/work bench sides of me!
Thanks! You can definitely tune your scooter better than the shop. I've had many bad experiences with scooter and motorcycle shops too. Now that you've watched this video, you know more about carburetors than those guys do.
I bought a new carburetor for my 1P39QMB scooter. It came with a 0.33 pilot jet & a 0.78 main jet. Obviously, I want to get more speed out of my scooter, so I'm trying to add more fuel because the new carburetor came with a high flow cone filter. So I tried changing the pilot jet to a 0.38 & the main jet to 0.85. I'm gonna try to do what you did & keep going up or down in jets to which ever gives me the best top speed.
Finally someone who know Carb,...Thanks, after a month of screwing thing up my scooter's back on the road :) ,...that's not one of the best video,..IT IS THE BEST VIDEO PERIOD !!!!!
Awesome video, I show this to my friends every time they think about going free flow on the intake. Too much trouble for so very little gains. Keep up the good work.
great video. explains a lot of what issues i am having with my taotao 50. Also explains what a PIA the taotao 50 is and how much work it always takes to keep it running. no wonder they are so cheap.
Bro, you definitely got it going on. I have a first gen Chuckus with a 80cc bore kit on it that hates me for some odd reason. Tomorrow I'm going to pop this carb off and check, but I guarantee I'm sitting at a 75 jet. I'll update this tomorrow.
This is well spent 15 minutes, very well explained. I have some problems with my scooter, working my way up in main jet right now. It runs decent but I dont think it gets enough fuel on full speed. It also stalls at idle if I do a quick twist and release on the throttle. Btw, I had the same ways with tha air filter box, removed and it wanted bigger jet. But I hate the noise from the open filter so I think I will modify a stock air box to work well. Maybe an open filter inside the box and more holes to get it flow enough. My scooter is 72cc and does about 70 kmh/44mph. I just want it strong, it does not need to go faster.
excellent video. i replaced air filter (upgrade) on a taotao GY6 49cc motor. totally changed performance. full throttle- engine boggs and almost dies. changed pilot to 33 (vs stock#30). adjusted main screw 1/4 to full turn, backseat. still has issue. maybe ill replace main jet???
Started with main jet 92. Swapped like 100 times. Ended up with a 90 main jet but with a new air filter. Long story short - it's waaay easier to diagnose air intake problems than main jet problems.
@@LabCoatPaul thing is those foam filters are too loud, which attracts unwanted attention. Though often a 50cc is also available as a 125cc, and those airboxes flow much better and they aren't too loud. Plus they've got the OEM branding and all of the E-numbers on them.
You really have alot of effects from different jets, i ride with the same jet year round, now with a foam filter but its the same jet as when i had the stock filter, and it rides perfectly, also got a performance exhaust on it now, and thinking about increasing the jet size from 86 to 88 or 90, will see.
My spark plug is black on my dirtbike and after riding it for a 10 minutes I starts to choke and dies...can I just twist that little screw on the carburator or no
i have in main jet 102 and pilot jet 50 (stock is 74 main and 50 pilot) 12mm carb polini 70cc sport Cold air inatake live in sweden, my moped still needs more gas but in mid range gas. it is acting wired. temp is right now (spring) around 19 day and round 7 night (can be much cooler) Celsius and not Fahrenheit
Wow! Thank you! This is one of the most well done videos I’ve ever seen on You Tube!!!! Please do one on adjusting the pull down motor on a 1993 Allante Rear soft top! The only thing on TH-cam is a 5 part! TERRIBLE... look at that and compare to this! Lol thanks!!!
If youre still in salt lake man we should scoot around! Im trying to get the most out of it. My scoot cost me $50. My buddy got a few scoots amd got one running for him. Both 150cc. Ive done all the work on our scooters, with thanks to your videos to of course. If you still do these videos I'd enjoy being featured? We can do some mod videos maybe? I am trying to learn small engines amd you in your lab coat bro seem like you know what youre talking about.
Love the way you broke everything down.. I been a big fan of 49ccscooter.com and his vids you does everything you did but even more methodical if thats the right word he uses work sheets that you can even print out from his site helpfull yes very much so.. BUT not REALLY my Style your method is more me. Thanks a ton for the vids.
Nice vid, def alot of info to take in. Now to do the math lol. I have a 2015 tao tao evo 50 and want to get the most i can out of it. Only thing i wanna do is take that plastic restrictor inside the airbox out. You know that piece that cuts the air intake in half. Gotta figure out how to readjust for that extra bit of air.
Impressive Video and Tutorial. This helps me a lot for me tune my Yamaha Mio Sporty Scooter. It's like a free ONLINE MOTORCYCLE MECHANIC COURSE 101. Keep up the Good work. I subscribed you bro
Riddle me this: Why is it that when I install an air filter directly to the carb, and my AFR gauge showed me that I was running extremely rich at all by the smallest jets I had. It could only hit like 28mph. I've got a 50mm bbk, ported big valve head, free exhaust, and 20mm stock carb. I get 42mph and am just a littlech when I run an 85 main jet with a modified stock intake.
Is your AFR gauge wideband? If your ratio is out of range, it might not read correctly. Was your spark plug black? Try swapping main jets for highest top speed, then look at the AFR gauge. 49cc scoot knows way more about this stuff than I do: www.49ccscoot.com/faq/bbkneeds.html
Thank you for your very clear and helpful video's! I have one issue/question I can't find an answer to: My scooter with QMB139 engine is running perfectly fine now after I took care of some issue's. That is with the mixture screw out 2-2,5 turns and a cleaned carburetor. At that setting my scooter reaches top speed +- 38 km/h (it's restricted with a vario ring so I don't need a helmet). I kept it at 2,5 turns now. But when I set the mixture screw at 1,5 turns my scooter still starts and runs ok, but it's max speed is only +-20 km/h. I really don't understand how that screw can have this affect on my top speed with gas handle fully open. As I understand from your video's the mixture screw only affects idle and not mid and high. How come it does affect it with my scooter? Could you enlighten me? Thanks in advance!
38 km/h is not full speed for these scooters. The restrictor prevents the scooter from going to full throttle. Also, the throttle slider is vacuum operated, so you're probably not going fast enough to get into only the main jet.
@@LabCoatPaul Thank you. I know it's not the max speed, but I ment max speed for how it's restricted in my country (NL). So what you're saying is, that with 1,5 turns my scooter won't make it to using the main jet, and with 2 or 2,5 turns it does?
Wow, my question to you sir is you said lowered elevation needs a higher jet as well as cold weather. So what if you at a lower elevation with warm weather, what's more important? the lowered elevation or the warm air and how should you jet it?
My issue is it takes off cold just great and runs fine, but after its warmed up and I start off at a stoplight, it's real slow until it hits about 12-15 and then bam- the power comes on. I have a 34 idle and 80 main, I dont remember why i had to go larger on the idle on the previous Taotao, but it worked great, now I have a newer TaoTao 50, and replaced the factory carb with an unsealed one and put in a 34 and 80 jets like before
First thank you for that explanation but my problem is ??? - my scooter turn down when I stop - he goes good in long rang drive but I think he uses too much fuel - I did not get any springing when I start to drive (he is limited to 50 km\h) Note :- my scooter is Yamaha ye 50 zest and my spark plug is black.
Great advice, and explaining. Thank you, this is wonderful help. I would love to talk to you. I am having a starting problem that I just cannot figure out.
Adjust the float height so the fuel valve closes when the floats are level with the carburetor. Watch this video at 5:11 th-cam.com/video/NJ3eEBeMako/w-d-xo.html
TY for your videos,,,,So tell me if this is correct when it comes to tuning a gy6 carb, turn the mixture screw until you are at highest idle, THEN adjust the throttle screw. When the mixture screw is turned in all the way in it should kill the engine, if it does not then you need a smaller pilot jet. Likewise, if you turn the mixture screw all the way out and you cant get highest idle the you need bigger pilot jet
Yes, that is correct. Also just ride the scooter and test the overall drivability to determine the correct pilot jet. It will have a lot of trouble just above idle if the jet is wrong.
I have a derbi senda 50cc, it starts at warm weather and runs, but at cold weather it starts but dies after 5-10 seconds if i dont give it gass - it also does like going at full throttle, it hesitates? But when i give it half throttle it goes like full throttle😅 i dont know if i should replace pilot or jet?
My scooter runs great when I get it started mainly have trouble getting it started but once it starts for a few seconds so can turn it off and start it right back up but then after I let it sit for a little while and cool down I have to crank it quiet a bit and feather the throttle for it to start but once again when it starts it will start right back up.
Also I think it might be possibly the battery cause it's a gy6 swapped Honda ruckus and the battery has a top of 130 cranking amps I haven't tested it yet but I think it might seem to start better on a kick start which I believe will deliver more compression on start up
@@rosslamoreaux3787 Start by checking your idle mixture. Ride the scooter for 5 minutes, then follow the idle mixture adjustment in this video. Also check your idle enricher. That's the thing with 2 wires on the carburetor. It should have power when the engine is running (at least 10 volts)
@@rosslamoreaux3787 Usually the electric starter turns the engine faster than the kick start. If you're starter is very slow, get a big battery, like the YTZ10S. Amazon is currently selling a cheap PowerStar AGM battery for $41.25. I have one. It's very good. It probably won't fit in the stock Ruckus battery mount.
I know this video is old.. but just getting into the scooter scene here.. I found a free 50cc taotao 2018 pony from a local by my work. All the parts appear stock and match up to the parts online.. however per your video at 11:36.. I can't fit my seat bucket all the way down nor can I fit that cover over the carb whatsoever. The seat bucket mashes down onto the front valve cover on the engine, and pushes down on top of the carburetor near the rear of the seat bucket... I've tried to search why a million different ways but apparently I'm the only one with this issue 🤷♂️ do you have any ideas for me as to why my engine is so squished upwards into the frame area to contact this seat bucket?? (And yes it's def oem)
Hi Paul - excellent video. I learnt a lot. One thing I didn't see was anything on checking & adjusting the float level. These carbs have a sloping body (gasket face)..... I'm confused; from where do you measure the float height please?
How is this working i have black sparkplug and a 50 main jet and it smells gas out of pipe i dont need to go lower than 50 thats ridicluous and its still bogging and getting too much gas whats wrong
This guys a real rocket scientist this is the best most complete carb tuning Video I’ve ever seen A+
Can someone describe to me what the sharp odor smells like? Cuz I have a harsh burning rubber smell and I can't find out why
Sbeary was going to say the same thing. I’ve seen lots of videos on carb tuning but this one is by far the best.
@@rannolong5435 a slippery clutch maybe, if your clutch is slipping its going to burn off the clutch material therefore it smells
Did he mention float adjustment? I don't remember him mentioning that. But everything else was awesome!
Yea it is.
I now am a PhD in carburetor tunning thanks to you👍
Holy crap is that road rash? I just went back in time.
ن٠
This is one of the best "carb tuning for dummies" videos l've seen so far. I would assume this would also apply to 150cc engines as well (except the jet sizes will be larger).
the carb is probably the same as the 50cc.
The amount of in depth detailed information quickly makes this video everything I wanted to know, thank you
I appreciate all the work you put into this video. I'm a novice trying to get a scooter running for my college-bound daughter. Thank you for explaining it so well!
This has honestly been the best video I've ever seen on carburetor adjustment. all about the practical application, doesn't overload me with scientific mumbojumbo that I'll never use, and really makes understanding the concepts and applications of carburetor adjustment palatable for the common wrencher.
Thanks for watching! That is exactly what I was going for. :)
Excellent Job Paul! I've watched a bunch of carb adjustment videos and I believe yours is the best.
One of the best explanation of jetting a small scooter motorbike Carb... Your explanation and graphics confirmed and reinforced my understanding and tuning techniques. .
I’ve seen lots of videos on carb tuning but this one is by far the best. If someone finds this hard to understand they need to watch it about five times.
Thanks! I'm happy to help.
I always had a rule about carburetors: Don't Touch!!!! Since mine decided to get clogged and had a few things go screwy on it, I had to break the rule. Glad to have found this video. REALLY needed the info. Thanks.
This is the best tutorial I've found so far. Been google searching how to tune for the 80cc big bore kit I installed and every google search is like people trying to protect some kind of international secret.
I've seen that too. It was hard to find some of the information for this video.
Excellent video I slowed the play speed down so I could absorb all your information thanks Doc.
That was about the Best explanation with awesome diagrams on how CV carbs work whether big or small!! How about one on a 4x CV carb setup :) :) Two BIG thumbs up man!!
OMG! This is the absolute best explanation of how a 50cc carburetor works! It finally makes sense!!!
I'm glad you liked it. Thanks for the compliment, and good luck with your scooter! :)
My scooter was bogging down alot after his vid i adjusted the vacuum needle and it works fine.
Your the man excellent help from you Thankyou so much 👍🏻👍🏻
You sir, are a brilliant teacher. This is crisp, fast, easy to understand and I am grateful and confident I’ll soon have my scooter running perfect. Thank you!!!
Thanks! I try to provide the information you need and not waste any time.
Update: After applying the method described, plus a valve adjustment, my scooter starts immediately, idles perfect both cold and hot, does not smell and pulls strongly on all speeds.
One of the most useful carb videos without the filler. Super helpful
Man this is the best information filled video I have seen you make it very easy to understand and has a lot of writing to go back and pics to double check while fixing my bike awesome and actually works 👍
Thanks! I'm glad it was helpful.
Hands down, absolutely best gy6 carburetor video I've seen yet!
Thanks! I'm glad you like it. :)
Excellent tutorial.... very clear and informative. I have watched several other videos explaining separate parts of the whole 'tuning puzzle' but this is the first complete and concise version I have found. Thank you for sharing...... it has helped me alot!
Best presentation and explanation of the options and interactions I've seen! And I've been watching a lot of vids now as trying to get my scooter running again! And last few times I rode it--after a "professional" tune up--it ran shitty. Until seeing this video, I was just worried about cleaning the carb & making sure the jets weren't blocked! Checked my jet sizes (35/88), so all makes sense it was running too rich! (It had ran well for the first few years I got it from the dealer, so really suspect the intelligence of the guys who last worked on it) So glad I'm finally teaching myself how to take care of it and a video like yours satisfies my engineering background and the hands-on/work bench sides of me!
Thanks! You can definitely tune your scooter better than the shop. I've had many bad experiences with scooter and motorcycle shops too. Now that you've watched this video, you know more about carburetors than those guys do.
The bessssst video on tuning carbs i ever saw, thnx man from Pakistan
Finally a complete review from carb working till adjusting ; great video
I bought a new carburetor for my 1P39QMB scooter. It came with a 0.33 pilot jet & a 0.78 main jet. Obviously, I want to get more speed out of my scooter, so I'm trying to add more fuel because the new carburetor came with a high flow cone filter. So I tried changing the pilot jet to a 0.38 & the main jet to 0.85. I'm gonna try to do what you did & keep going up or down in jets to which ever gives me the best top speed.
Finally someone who know Carb,...Thanks, after a month of screwing thing up my scooter's back on the road :) ,...that's not one of the best video,..IT IS THE BEST VIDEO PERIOD !!!!!
A big thank you for the compliments, and for watching! I'm glad your scooter is better. :)
I have watched this easily 10 times while setting up the the new carb for my scooter. everything is laid out so easy oto understand.
I'm glad it worked for you, and thanks for the views! :)
Great explanation, the most detailed carburator adjustment ive ever watch
Awesome video, I show this to my friends every time they think about going free flow on the intake. Too much trouble for so very little gains. Keep up the good work.
great video. explains a lot of what issues i am having with my taotao 50. Also explains what a PIA the taotao 50 is and how much work it always takes to keep it running. no wonder they are so cheap.
Bro, you definitely got it going on. I have a first gen Chuckus with a 80cc bore kit on it that hates me for some odd reason. Tomorrow I'm going to pop this carb off and check, but I guarantee I'm sitting at a 75 jet. I'll update this tomorrow.
THANK YOU PROFESSOR IT WAS THE BEST CARBURETOR TUNING EXPLANATION VIDEO EVER
This is gonna help me so much with my scooter`s problems! You`re a lifesaver :)
Best video on YT. Omg i learned more in 15 minutes than 3 months of online advice...
Thanks! I'm glad it was helpful.
This is well spent 15 minutes, very well explained. I have some problems with my scooter, working my way up in main jet right now. It runs decent but I dont think it gets enough fuel on full speed. It also stalls at idle if I do a quick twist and release on the throttle. Btw, I had the same ways with tha air filter box, removed and it wanted bigger jet. But I hate the noise from the open filter so I think I will modify a stock air box to work well. Maybe an open filter inside the box and more holes to get it flow enough. My scooter is 72cc and does about 70 kmh/44mph. I just want it strong, it does not need to go faster.
excellent video. i replaced air filter (upgrade) on a taotao GY6 49cc motor. totally changed performance. full throttle- engine boggs and almost dies. changed pilot to 33 (vs stock#30). adjusted main screw 1/4 to full turn, backseat. still has issue. maybe ill replace main jet???
Started with main jet 92. Swapped like 100 times. Ended up with a 90 main jet but with a new air filter. Long story short - it's waaay easier to diagnose air intake problems than main jet problems.
True. I was surprised how much of a difference that air filter made.
@@LabCoatPaul thing is those foam filters are too loud, which attracts unwanted attention. Though often a 50cc is also available as a 125cc, and those airboxes flow much better and they aren't too loud. Plus they've got the OEM branding and all of the E-numbers on them.
The most elaborate I´ve ever seen. Thank You!
this is by far the best video on carb tuning I have ever seen straight to the point great videos and a recap BRAVO !!!! im going to subscribe
Well explained and graphically presented again. Thank you.
Best Carb explanation Ive ever seen, thanks'
best and most informative carb tuning guide THANKS FOR THIS
Great detailed video. It has to be rewound. or played at three quarter speed, to pick up the information.
You really have alot of effects from different jets, i ride with the same jet year round, now with a foam filter but its the same jet as when i had the stock filter, and it rides perfectly, also got a performance exhaust on it now, and thinking about increasing the jet size from 86 to 88 or 90, will see.
Good Job, great video! Adjusted the needle hight on my zuma 50 and now no hesitation mid range.
At last I found the right person in YT👌👌👌👌. Thank you 🙏
this was an extremely well explained and executed video. Very informative and i can't thank you enough kind sir.
My spark plug is black on my dirtbike and after riding it for a 10 minutes I starts to choke and dies...can I just twist that little screw on the carburator or no
AFR 12 - 12.5 is PERFORMANCE!
GOOD EXPLANATION, THANKS FOR SHARING. 🇺🇸✌️👍🏻
all how to videos need this information setup and organization! perfect! :-)
HOLY CRAP I LOVE YOU. thank you for making this video. soooooo good.
the best video I have seen in my entire life!
you have cured my carb woes... potentially. new engine, but the carb is questionable due to the tinkerings of an inexperienced former owner. thanks!
Another great video with good detail and explanation.
Glad you liked it!
My questions are answered because of this man
i have in main jet 102 and pilot jet 50 (stock is 74 main and 50 pilot)
12mm carb
polini 70cc sport
Cold air inatake
live in sweden, my moped still needs more gas but in mid range gas. it is acting wired.
temp is right now (spring) around 19 day and round 7 night (can be much cooler) Celsius and not Fahrenheit
Wow! Thank you! This is one of the most well done videos I’ve ever seen on You Tube!!!! Please do one on adjusting the pull down motor on a 1993 Allante Rear soft top! The only thing on TH-cam is a 5 part! TERRIBLE... look at that and compare to this! Lol thanks!!!
Excellent explanations
Thanks man, best vidio i have seen about this topic
Nice, clear, informative vid! I used to have a lab coat, raised my IQ by at least 10%.
This was so comprehensive, thank you.
If youre still in salt lake man we should scoot around! Im trying to get the most out of it. My scoot cost me $50. My buddy got a few scoots amd got one running for him. Both 150cc. Ive done all the work on our scooters, with thanks to your videos to of course. If you still do these videos I'd enjoy being featured? We can do some mod videos maybe? I am trying to learn small engines amd you in your lab coat bro seem like you know what youre talking about.
Love the way you broke everything down.. I been a big fan of 49ccscooter.com and his vids you does everything you did but even more methodical if thats the right word he uses work sheets that you can even print out from his site helpfull yes very much so.. BUT not REALLY my Style your method is more me. Thanks a ton for the vids.
Nice video, well put together. Good info. Excellent focus.
Excellent Video Paul, Well Done!!!
Thanks! I'm glad you like it.
Nice vid, def alot of info to take in. Now to do the math lol. I have a 2015 tao tao evo 50 and want to get the most i can out of it. Only thing i wanna do is take that plastic restrictor inside the airbox out. You know that piece that cuts the air intake in half. Gotta figure out how to readjust for that extra bit of air.
This video is sooo useful thank you for saving my time
Impressive Video and Tutorial. This helps me a lot for me tune my Yamaha Mio Sporty Scooter.
It's like a free ONLINE MOTORCYCLE MECHANIC COURSE 101.
Keep up the Good work.
I subscribed you bro
The needle controls midrange. Not affected much by main jet. The main jet controls upper range.
Riddle me this: Why is it that when I install an air filter directly to the carb, and my AFR gauge showed me that I was running extremely rich at all by the smallest jets I had. It could only hit like 28mph. I've got a 50mm bbk, ported big valve head, free exhaust, and 20mm stock carb. I get 42mph and am just a littlech when I run an 85 main jet with a modified stock intake.
Is your AFR gauge wideband? If your ratio is out of range, it might not read correctly. Was your spark plug black? Try swapping main jets for highest top speed, then look at the AFR gauge. 49cc scoot knows way more about this stuff than I do: www.49ccscoot.com/faq/bbkneeds.html
I never realized this was such a science
Thank you for your very clear and helpful video's!
I have one issue/question I can't find an answer to:
My scooter with QMB139 engine is running perfectly fine now after I took care of some issue's. That is with the mixture screw out 2-2,5 turns and a cleaned carburetor. At that setting my scooter reaches top speed +- 38 km/h (it's restricted with a vario ring so I don't need a helmet). I kept it at 2,5 turns now.
But when I set the mixture screw at 1,5 turns my scooter still starts and runs ok, but it's max speed is only +-20 km/h.
I really don't understand how that screw can have this affect on my top speed with gas handle fully open.
As I understand from your video's the mixture screw only affects idle and not mid and high. How come it does affect it with my scooter? Could you enlighten me? Thanks in advance!
38 km/h is not full speed for these scooters. The restrictor prevents the scooter from going to full throttle. Also, the throttle slider is vacuum operated, so you're probably not going fast enough to get into only the main jet.
@@LabCoatPaul Thank you. I know it's not the max speed, but I ment max speed for how it's restricted in my country (NL). So what you're saying is, that with 1,5 turns my scooter won't make it to using the main jet, and with 2 or 2,5 turns it does?
Thank you so hecking much!!!! Excellent series
After market air filters require frequent jet changes. Than the stock air box ! Bill
Wooow you deserve much more subs, watched only one yours video and already subbed
Thank you! I'm glad you liked it.
Wow, my question to you sir is you said lowered elevation needs a higher jet as well as cold weather. So what if you at a lower elevation with warm weather, what's more important? the lowered elevation or the warm air and how should you jet it?
My issue is it takes off cold just great and runs fine, but after its warmed up and I start off at a stoplight, it's real slow until it hits about 12-15 and then bam- the power comes on.
I have a 34 idle and 80 main, I dont remember why i had to go larger on the idle on the previous Taotao, but it worked great, now I have a newer TaoTao 50, and replaced the factory carb with an unsealed one and put in a 34 and 80 jets like before
I run 82m 32p on my taotao
give this man a medal
EXCELLENT tuning video!
My scooter is fine when i first ride but after 5 minutes when i get from 0-30 KMH it has less power any suggestions will help!
After 5 minutes, your idle enricher turns off extra gas. Try turning your idle mixture screw counter-clockwise to add some gas.
First thank you for that explanation but my problem is ???
- my scooter turn down when I stop
- he goes good in long rang drive but I think he uses too much fuel
- I did not get any springing when I start to drive (he is limited to 50 km\h)
Note :- my scooter is Yamaha ye 50 zest and my spark plug is black.
Wow 😱 . Your tech was so good. What about yamaha xtz125 sir. God bless. Thankyou
Could you turn in the mixture screw with the richer pilot? Instead if unstalling a smaller pilot jet
Great advice, and explaining. Thank you, this is wonderful help. I would love to talk to you. I am having a starting problem that I just cannot figure out.
Really good video
fantastic explanations. Thanks!
this is the same to 150 cc too. good job.
Great job pity you did not show us the way to do the float height perhaps one day you will show us thanks. Jeff
Adjust the float height so the fuel valve closes when the floats are level with the carburetor. Watch this video at 5:11 th-cam.com/video/NJ3eEBeMako/w-d-xo.html
Thanks a lot.. I love it.. u explain like a boss
TY for your videos,,,,So tell me if this is correct when it comes to tuning a gy6 carb, turn the mixture screw until you are at highest idle, THEN adjust the throttle screw. When the mixture screw is turned in all the way in it should kill the engine, if it does not then you need a smaller pilot jet. Likewise, if you turn the mixture screw all the way out and you cant get highest idle the you need bigger pilot jet
Yes, that is correct. Also just ride the scooter and test the overall drivability to determine the correct pilot jet. It will have a lot of trouble just above idle if the jet is wrong.
I have a derbi senda 50cc, it starts at warm weather and runs, but at cold weather it starts but dies after 5-10 seconds if i dont give it gass - it also does like going at full throttle, it hesitates? But when i give it half throttle it goes like full throttle😅 i dont know if i should replace pilot or jet?
such an excellent video!
13:52 "It just died; I couldn't ride home." I don't believe you. Jet sizes will affect the performance, but the engine won't die.
Souch information. Too bad it's midnight or id be outside working on it right now!
Extremely well explained I have a few questions regarding my scooter if you have time.
,Thanks
Sure! what's going on with it?
My scooter runs great when I get it started mainly have trouble getting it started but once it starts for a few seconds so can turn it off and start it right back up but then after I let it sit for a little while and cool down I have to crank it quiet a bit and feather the throttle for it to start but once again when it starts it will start right back up.
Also I think it might be possibly the battery cause it's a gy6 swapped Honda ruckus and the battery has a top of 130 cranking amps I haven't tested it yet but I think it might seem to start better on a kick start which I believe will deliver more compression on start up
@@rosslamoreaux3787 Start by checking your idle mixture. Ride the scooter for 5 minutes, then follow the idle mixture adjustment in this video. Also check your idle enricher. That's the thing with 2 wires on the carburetor. It should have power when the engine is running (at least 10 volts)
@@rosslamoreaux3787 Usually the electric starter turns the engine faster than the kick start. If you're starter is very slow, get a big battery, like the YTZ10S. Amazon is currently selling a cheap PowerStar AGM battery for $41.25. I have one. It's very good. It probably won't fit in the stock Ruckus battery mount.
Very interesting and useful
I know this video is old.. but just getting into the scooter scene here.. I found a free 50cc taotao 2018 pony from a local by my work. All the parts appear stock and match up to the parts online.. however per your video at 11:36.. I can't fit my seat bucket all the way down nor can I fit that cover over the carb whatsoever. The seat bucket mashes down onto the front valve cover on the engine, and pushes down on top of the carburetor near the rear of the seat bucket... I've tried to search why a million different ways but apparently I'm the only one with this issue 🤷♂️ do you have any ideas for me as to why my engine is so squished upwards into the frame area to contact this seat bucket?? (And yes it's def oem)
Hi Paul - excellent video. I learnt a lot. One thing I didn't see was anything on checking & adjusting the float level. These carbs have a sloping body (gasket face)..... I'm confused; from where do you measure the float height please?
How is this working i have black sparkplug and a 50 main jet and it smells gas out of pipe i dont need to go lower than 50 thats ridicluous and its still bogging and getting too much gas whats wrong
You sir definitely earned the right to wear that lab coat