TaoTao ATM50-A1 Chinese Scooter PDI Assembly Part 10 : Engine And CVT Fasteners
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- čas přidán 29. 08. 2024
- Part 10 of the Chinese scooter PDI assembly video series goes over the nuts and bolts of the engine and CVT transmission briefly.
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#PDI #ChineseScooter #49ccScooter
![GY6/139QMB 50cc 4-stroke [Chinese scooter] COMPLETE transmission disassemble/reassemble](http://i.ytimg.com/vi/sdUvzmFJA1g/mqdefault.jpg)
First of all, I can't thank you enough for putting together such a high quality and comprehensive video series on getting these scooters assembled. I've beed doing a lot of research on this topic these last few days, as I've just bought the exact same model as yours, and I was hoping I could get your take on another scooter mechanic's two cents: I can't include a link in this comment, but google "real life chinese scooter mechanic here" (Continued in next comment...)
Great INFO, right to the point, good instruction. Also Thank you for listing socket and wrench size.
I do not claim to be an oil expert, but I can tell you that 10W40 and 15W40 work well for the vast majority of Chinese scooter owners. It's always worked well for me. I prefer full synthetic, but just to save a few dollars because I'll change it so often when I mod things I use the Shell Rotella shown and buy it by the gallon or 2.5gal container.
Thanks for the clarification, and again, thank you SO MUCH for putting this together.
It's the same gasket that's on this video with the belt you know you take the cover off to tighten the gears that gasket but right on bro thank man you been a big help with my scooter
Inchyladas Definitely get the gasket kit for that. It'll prob cost just about as much for that 1 lg gasket as for all of them. That said, the gasket is not there to stop oil from leaking. There is not supposed to be oil in your CVT so you either have a bad crank or drive shaft seal or possibly the seal on the chain tensioner bolt. Clean it up and take a brief ride and see if you can tell where it's coming from.
I like your all Video, and you do very good jobs thank you
As you can see, most of what he has to say aligns neatly with what you go over in this series, but you do seem at odds on two points. First, he swears by 5W-50 oil, and you have a different recommendation. And second, he stresses changing out the stock drive belt with a Gates Powerlink Belt, and you make no mention of replacing the belt. I was actually surprised, as you go so far as to recommend changing out stock nuts, so I figured something as fundamental as the drive belt...
Awesome !!!!
I can't even get that cover off of my scooter. I tried to get it off because my kickstarter is broken. I used an 8mm socket wrench and those hex bolts just wouldn't budge. For some reason I also had some slippage with the 8mm and did t want to strip the bolts but it looks like they have some wear.
Checked my belt just so I'd know what I need when I need to replace it. Numbers on the belt are: 669 18 30
That's what all of the short cases should use. Bando belts are a good choice IMO. Stay away from no-name cheap Chinese belts. I have used them on different scoots and they always broke very prematurely.... like some within 10 miles.
***** Yea, my friend has a 150cc that he recently replaced the belt on and the new belt broke after about 40 miles.
I think I know the answer, but how important is the engine/fan shroud? Is it more effective than having an open design with the panel under the seat removed? I’m thinking it’s a vital component, but I wish I could remove it.
Vitally important. These are designed for cooling by a fan, not by airflow from movement. They will heat up rapidly if used without shrouds and/or the fan. Look at the way fins are oriented on this engine vs most open air cooled engines for one reason why.
Thanks for the insight. You’re a legend in the scooter community and I appreciate your videos. So I just upgraded to a 47mm bbk with an A9 camshaft and stock head for high compression. I’m betting that you’ve done a similar setup. The 90 main jet and 4.75g sliders worked perfectly from your other video with the stock engine. If you have done a similar setup, can I ask what main jet and sliders you ended up with?
@@ANONYMOUS-ex2bp A lot of people end up around 6-8g. Even though ~5g is good for many stock 139QMBs and I'm glad it worked for you, I always recommend tuning. Good news is that you can probably add some weight to what you've got to see how it works before buying anything. czcams.com/video/YkNhqEFeWVQ/video.html
Hello sir can you tell me which video to watch to put my cable back on my seat I took it off and now when I put it back on and don’t lock thank you very much The seat lock cable it’s brand new Tao 50
8m26s
czcams.com/video/nVFBWHp8L_E/video.html
Hey,
I'm not sure what exactly is wrong with my scooter tao tao atm50-a1. I press the starter button with my brand new battery, and it tries to start but the back cvt just makes a spinning/grinding noise without the engine starting. Sometimes it works and other times it just sounds like it can't catch anything and it's slipping. What do you think could be the problem? Do I need to take apart the cvt assembly? If you can help at all, I'd really appreciate it.
-Matt
You'll probably need to take the CVT cover off and look at the bendix. That's what engages to let the starter turn the engine. Sometimes bushings that it sits in get worn and it has too much play and sometimes the bendix kinda sticks.
90GTVert thanks!
My kick starter is messed up I got all the pieces to fix it but is there gear oil in were its at if so what kind do I need to buy
No gear oil where the kick start is on these belt drive scooters...
czcams.com/video/CKz3APz3WMo/video.html
Sorry to keep bothering you bro one last question I know you said there shouldn't be any oil in there because it was very little oil it's been sitting at home for a day and nothing dripped and I just opened the cvt cover and it was very little oil kinda weird because it isn't dripping for any where and nothing else is full of it..... I'm go ahead and tighten what you did in the video and ride it like you said see what happens thanks again and sorry for the bother
Inchyladas Mine will leak oil out of the CVT cover when my engine oil seal fails. Very common issue on the 139QMB. czcams.com/video/j-ZpL4cCW2c/video.html
How do I know how much torque I'm putting on the bolts and belts if I don't have any of those tools?
You don't.
For the belt, my stock one didn't show accelerated signs of wear. I do put more faith in other belts. I prefer Bando, some like Gates. Bando has treated me better on higher powered scoots so I stick with them. There are some Chinese belts, especially the ones you can find for say $10-15 normally, that are really junk. I've destroyed them in under 10 miles on 40MPH scoots. Total junk, stay away, change it out immediately if you have one.
Hey man where can I find a gasket for a Tao Tao 50 my shit was broken and started to leak oil so I tighten the screw more and broke the screw what should I do? Pls help
Inchyladas I'm not sure exactly what gasket and screw you are referring to. I think for gaskets your best deal is to get one of the complete sets on eBay. Should be able to find them looking for 139QMB gasket set or something like that. Not too expensive and you'll have spares for any other repairs you may need to do. You'll probably need to extract the screw. If it's sticking up then grab it with vise grips and turn it out. If not you'll prob have to use a left hand drill bit or screw extractor.
Hi again I have one last qn. I bought a 669 18 30 belt. It just doesn’t fit and when I checked my stock belt it was the same size. I have seen plenty of videos where people just fit it in really easily. I can barely fit it. Should I just go with a 729, it works fine but makes a weird sound.
Noise that tells me the belts touching something inside.
A proper belt should fit at or near the drive boss up front while at or near the edge of the rear pulley without slack. Not being stretched, but not loose. Too long and there will be slack which can give poor takeoffs and possibly could come off of the pulleys.
Do you have any suggestions for me as to how I can get those hex bolts out of there? Why are they so hard to turn, do they have loc tite on them?
I'd start with a socket that doesn't slip. None of mine have been loctited, but it's not out of the question. If you have a socket that doesn't slip, give the ratchet a bump with your palm instead of just applying pressure. Might break them loose.
Ok, thanks for the pointers.
I know this is a old video, but I meed to change my crankshaft, can you tell me what tools I need to use for me to replace it or a link if you have done a video on it already?
I have a 50cc evo 50
@@Tigga476 A good tool kit with the basics (metric sockets, ratchet, pliers, etc...). Soft hammer/mallet. Some way to hold things to remove/install the flywheel, variator, etc... (specialty holding tool, pin spanner style holding tool). Feeler gauges to set valves. A torque wrench. Heat gun or propane torch to heat the cases a little for crank install. I may be forgetting something, but that should cover most of it.
Do I need some kind of clutch nut tool as well to remove the crankshaft, like is there some kind of bolt that requires a special tool and what size do I need if so?
@@Tigga476 It has been a while since I had one of these apart now, but their cam and pump drive gears are smaller than the bearings so they can be removed and installed without needing to pull gears.
Why does my scooter Screech when I turn it on and I was driving it and it had a loud Screech died on me. A bad screeching sound. Is there anybody out there that can tell me why this happened. I checked the belt and nothing wrong with it it is still intact everything seemed to be good in good condition starter motor and everything. Can somebody tell me why this is happening a loud Screech screeching noise and then it dies.
If you could post a video of it, that would probably help.
@@49ccscoot I am unable to post a video because it will not run or start. It only does a like rattling sound when I try to start it, like a chain sound and it will not start on me.
The mechanic that works on it when need repairs told me sounded like a compression problem. The sound comes from the C V T area again like a screeching sound .
@@49ccscoot To give you an idea the sound it makes is like a saw sort of when cutting wood and then goes so fast that I had to use the emergency button to turn it off otherwise it kept going.
@@currenteventsofnews9184 It sounds like at least part of your problem may be the starter bendix.