|
|
Post by gy6er on Jan 16, 2016 20:25:18 GMT -5
I suppose that is possible too. Is there any way I can inspect this to verify that might not be the case? I really cannot afford to buy these parts, the reason I have a scooter is I can't afford anything else. Unless you have installed clutch springs you may not be familiar with how to take them out and then reinstall to feel tightness and final fit,but gy6 store has them for I believe $7.00 and God willing they do work and you will get a feel how to fix them. They should fit in snug and be kinda hard to use a pic to get them in place. Also if you do buy some,watch out,they can and may get ya pricked if not cat like. Look at first reply Gy6er made. |
|
|
|
Post by tvnacman on Jan 16, 2016 20:28:31 GMT -5
I would recheck the variator and all its parts.
John
|
|
Currently Offline
Posts: 0
Likes:
Joined: Nov 21, 2024 22:20:42 GMT -5
|
Post by Deleted on Jan 17, 2016 8:09:26 GMT -5
I had an idea from a mechanic I was talking with that it could, somehow, be a slipping or otherwise malfunctioning camshaft / chain. I can only continue to clarify that the variator, old and new, work perfectly fine and the problem existed prior to any alteration to the variator, belt, and clutch. No damage nor installation nor parts show any deformities nor improper installation as further verified by, again, other installation videos.
Any references or posts which explain this exact problem in relation to those solutions, however, would be valuable. If somebody has described this exact problem and it was in fact the clutch springs (a part I am wholly unfamiliar replacing nor have the tools to replace as yet), corroboration before going down that road would be exceedingly helpful. I am constrained heavily by finances and cannot simply afford to buy a plethora more tools in one-go to troubleshoot everything. What would be of most help is anybody having any post matching the exact problem where the engine freewheel's at load at given speeds/RPM's.
|
|
|
|
Post by JR on Jan 17, 2016 8:20:30 GMT -5
Scooter in question: TaoTao ATM50-A1 2013, GY6 139QMB 50cc engine. Scooter has about 10k miles on it. I've consistently changed the gear and engine oil, as well as kept up on maintenance, and replaced parts (indicated below). I've replaced the stock fuel filter and carburetor, belt, Variator, spark plug, clutch, and already replaced fuel lines as well as the fuel pump valve petcock with a switch. Pretty standard modifications from what I've seen. I replaced all default parts with equivalent parts (there are no "enhanced" or "performance" parts) per matching specifications. I've also done valve adjustments to keep them within spec, and generally managed to achieved 35-40 MPH up hills until recently. The problem: After a given RPM, indicated about 25-30 MPH on flat land, the engine will rev to maximum (gauged by sound) and all power to the drive is lost. I replaced the variater and clutch thinking the clutch might be the cause (and I might as well replaced worn parts). The rear wheel will also, regardless of the idle speed, continuously spin as though the clutch is permanently engaged. This occurred with the old and new clutch, and in spite of removing the housing to observe the clutch I could not visually determine the cause. As I've reached the end of my rope and ability to search for an issue so close to the common fuel issues (like "bogging down", etc), I've had to make my first post here to ask for help. There are no scooter shops that service Chinese model scooters within 20 miles of me, unfortunately, so I'll be doing all servicing myself (as I have been). I missed this part of your initial post: Question? At a normal adjusted idle speed can you put the scooter on the center stand and hold the back wheel to keep it from spinning and the engine idle with no issues? JR |
|
Currently Offline
Posts: 0
Likes:
Joined: Nov 21, 2024 22:20:42 GMT -5
|
Post by Deleted on Jan 17, 2016 17:13:22 GMT -5
It does idle normally when the rear wheel is stopped. I know this as I've applied the brake to it while trying to troubleshoot the cause multiple times over a few days, and the idle is unaffected. That specific issue began before I replaced the belt, which originally caused me to think it was the belt. Which then, combined with the second issue, caused me to replace the variator and clutch as possible problems. This worked for a time and then the issue with the freewheeling began. :<
I also have a brand new problem. The scooter started just yesterday, and today makes a horrendous screeching noise and will not start when turned over. So I can't double-check whether there's no change to idle, though I've spent a lot of hours trying to diagnose it I did want to double-check for you. I'll have to fix whatever is causing this new problem tomorrow, so I can double-check that idle.
|
|
|
|
Post by JerryScript on Jan 17, 2016 21:15:25 GMT -5
Do you have 12-13" wheels? I'm wondering if you have the right belt.
|
|
|
|
Post by JR on Jan 18, 2016 7:13:09 GMT -5
Do you have 12-13" wheels? I'm wondering if you have the right belt. According to the specs it has 10" wheels: www.taotao.us/index.cfm/scooters/atm50-a11/Looks like the typical 139QMB engine? www.taotao.us/default/cache/file/63EBDA66-0B59-43A4-89A054ECDF578E26.jpgATM50A1 Engine: Engine Size: 49 cc Start Type: Electric with keys, kick start back up Transmission: Fully Automatic Drive: CVT HP: 1.8 Cooling: Air Cooled Ignition: CDI Top Speed: 25 MPH (42KM/H) Chassis: Front Brakes: Disc Rear Brakes: Drum Front Tires: 100/60 - 10 inches Steel Rims Rear Tires: 100/60 - 10 inches Steel Rims Front Suspension: Hydraulic Rear Suspension: Hydraulic Spring Controls: Twist Throttle, Fully Automatic Lighting: Headlights, Brake, Blinkers, Street Legal Dimension: G. W.: 220 lbs Length: 67.32" Width: 30.7" Height: 51.57" Weight Capacity: 225 lbs Now take note of rider weight to speed ratio spec ratings. I own a 50cc scooter nearly identical and with my 250lbs on it 35mph is max and that's by the incorrect Chinometer and it'll not hold 35mph on the hills and I do live in the hills. It only has 500 miles on it too, 10k is a lot of miles on a 50cc scooter. The screeching sound may be a bad omen? Belt size for 139QMB long version = 729-17.5-30 Belt size for 139QMB short version = 669 18 30 JR |
|
Currently Offline
Posts: 0
Likes:
Joined: Nov 21, 2024 22:20:42 GMT -5
|
Post by Deleted on Jan 19, 2016 18:31:26 GMT -5
I'm only 130 pounds, and I've previously had it running 40-50 MPH with 35-40 MPH up some pretty steep hills (Keep in mind this is verified with GPS), so the 25 MPH "top speed" is a lie outright. Unfortunately we're experiencing a freeze snap and I can only work in an unheated garage. May not be able to touch the scooter again for some time, with hands freezing to tools. :<
|
|
Sophomore Rider
Currently Offline
Posts: 168
Likes: 30
Joined: Feb 26, 2013 15:44:08 GMT -5
|
Post by cookees on Jan 19, 2016 22:29:39 GMT -5
10,000 miles on a scooter that wholesales for about $425 is quite a feat.
|
|
|
|
Post by JR on Jan 19, 2016 23:25:11 GMT -5
I'm only 130 pounds, and I've previously had it running 40-50 MPH with 35-40 MPH up some pretty steep hills (Keep in mind this is verified with GPS), so the 25 MPH "top speed" is a lie outright. Unfortunately we're experiencing a freeze snap and I can only work in an unheated garage. May not be able to touch the scooter again for some time, with hands freezing to tools. :< Lot's of varables and 25MPH is based upon a average rider weight. Myself I'm 250lbs so that makes a difference plus when I say hills I actually mean the Ozark mountains and some very steep climbs, one less than a half mile from my house rises over 900ft in less than a 2 mile stretch. Heck you can air the tires up hard as a brick and gain 2mph. Your bad sound plus 10k in miles may very well be the answer you have been looking for? JR |
|
|
|
Post by onewheeldrive on Jan 20, 2016 1:39:20 GMT -5
I'm only 130 pounds, and I've previously had it running 40-50 MPH with 35-40 MPH up some pretty steep hills (Keep in mind this is verified with GPS), so the 25 MPH "top speed" is a lie outright. Unfortunately we're experiencing a freeze snap and I can only work in an unheated garage. May not be able to touch the scooter again for some time, with hands freezing to tools. :< Maybe, in time when funds are available, you should invest in a cheap space heater for the garage. Maybe even an extension cord. The $20 or so that I spent on my first one went a long way. I have a smaller garage so it doesn't take long to make it tolerable (hour or two)--- even in the sub-zero cold blasts we've had the last few winters. Leave it on longer, and you may only need a long sleeve shirt, if that, for longer projects. I tend to go in the garage for other things during colder months than just working on things. One thing leads to another, the next thing you know your garage turns into a mancave!  |
|
|
|
Post by tortoise on Jan 20, 2016 11:59:56 GMT -5
Hard to believe for a stock TaoTao ATM50-A1 2013, GY6 139QMB 50cc engine! If you end up removing the head, please post the piston diameter.
Although generally considered bottom-tier, the relatively cheap TaoTao ATM50-A1 is probably at the top of USA annual-units-sold list.
|
|
Currently Offline
Posts: 0
Likes:
Joined: Nov 21, 2024 22:20:42 GMT -5
|
Post by Deleted on Jan 26, 2016 14:50:43 GMT -5
Hard to believe for a stock TaoTao ATM50-A1 2013, GY6 139QMB 50cc engine! If you end up removing the head, please post the piston diameter.
Although generally considered bottom-tier, the relatively cheap TaoTao ATM50-A1 is probably at the top of USA annual-units-sold list.
Honestly I've never understood the reports of horrible TaoTao performance, as mine always performed well above those (and it never even needed de-restricting). We're having a horrible cold front and I can't afford even the cheap space heaters, so I'll probably let this thread sit on ice until I can get at the scooter (except to answer any additional questions). The 10k miles thing for a TaoTao is also something I didn't want to believe, because my perpetual poverty means _that is legitimately all I can afford_. This is why I put so much maintenance into it, because I damn well knew it was a piece of . It's a real shame regulations are so strict in my state, too. I could probably disassemble and reassemble the ATM50-A1 model blindfolded forward, backward, upside down, and sideways. That's why this ridiculous problem of the arbitrary disengaging at ~20-30 MPH is infuriating to me. I've found every single problem this scooter has ever had EXCEPT this one. I desperately cannot afford to junk this thing :< |
|
|
|
Post by steve on Jan 26, 2016 16:42:29 GMT -5
I'm curious, are you sure you tightened the bolt on the variatior really tight?
That screeching noise sounds like when I have forgotten to tighten the variator bolt with the impact.
Also, im curious as to when you replaced the belt, and what size belt you used?
Do you have 10" tires?
|
|
|
|
Post by tvnacman on Jan 26, 2016 18:36:44 GMT -5
i think the belt maybe jumping the edge of a pulley
John.
|
|
