KymcoForum.com
Scooters - 50cc => Agility 50 => Topic started by: DoGOV on July 26, 2011, 10:24:03 PM
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I have a Kymco Agility 50 and I've been having some trouble with it lately. I am the third owner of this scoot and it has almost 2000 miles on it (or Km, not sure what the the meter reads). But anyway, I've notice that there are three things that it will do randomly. Theses things really are completely random and do not happen all the time but rather frequently I guess. (1) has trouble starting up. Usually if i just leave it alone and come back or just keep trying it will eventually work. (2) will bog out when going up a hill with two people on it (average weight people). It will also shut off when I stop at the top of a hill when I'm just on it. (3) the most persistent thing that bothers me is that when I'm going a "high" speeds (like 40+) it sounds like there is a rattle noise coming from the variator area. If any body knows what might be the problem please respond. I've taken the thing apart and I'm going to clean the carb, but I don't know how to tune the jets and I have to wait to get carb cleaner cause I'll be broke for a couple days. Ive also looked at the variator and I'm not sure if anything is really loose. The "little gear thing" that the electric start turns can be a little loose if you play with it. I took the spark plug off and it looks okay I guess.
Edit: here's a video Scooter on 07-25-2011 (http://www.youtube.com/watch?v=I48gNZzAuiI#)
Edit 2: cleaned carb, messed with jets, put everything back together, test drove, worked fine, changed oil (synthetic motorcycle oil) cause I was just using regular blend, now it won't start!!! Here's another video Scooter on 7-26-2011 (http://www.youtube.com/watch?v=6LmE690P3wM#)
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if it stops/cuts out or bogs could mean that your carb tick over screw is in the wrong position
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if it stops/cuts out or bogs could mean that your carb tick over screw is in the wrong position
What is a "carb tick over screw"? I have messed with the two jets when you open the carb, the main jet (the little one) and the other one below it (not sure what it's called). The main jet is an 82 I think. How do you start tuning these? Lets say I tighten them down all the way, then what. I've heard turn them both counter-clockwise like 1.5 or 2 turns but the the main jet would fall out. Is a full turn a 180 degree turn or a 360 degree turn, because that makes a big difference.
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i dont know much about carbs, all ive done is cleaned one and adjusted the tick over screw. its a screw inside a spring, start of by screwing it up tight and undo it a quater turn at a time untill your happy with how it sounds and so it doesnt cut out/bog.
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i dont know much about carbs, all ive done is cleaned one and adjusted the tick over screw. its a screw inside a spring, start of by screwing it up tight and undo it a quater turn at a time untill your happy with how it sounds and so it doesnt cut out/bog.
Ah, I see what your speaking of. That's the screw that will open the trottle when tightened some. I don't think that's the problem because it has a nice idle when it runs. It will just change after going up a hill (especially with 2 ppl). Now I just wished it would start!
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try replacing the spark plug if you haven't already that will eliminate that choice of being the problem if nothing else plus my bike runs a bit smoother on a new plug. the starter gear that you mentioned will sometimes rattle at those speeds mine does but my exhaust is pretty loud so i don't hear it anymore some people on here have fixed it but you would have to search the forum to find that solution as i don't remember how. if you're hitting 40+ i'm sure your scoot has been de-restricted so you may want to go up a little in jet size. also check your CDI (the little black box with the green plug in your battery box) to see if it has a cut in it, if not you should search the forum for cdi cut and go ahead and do it that could possibly help with starting and it will give you a good increase in power as it takes the rev limiter off the ignition. hope this helps :)
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try replacing the spark plug if you haven't already that will eliminate that choice of being the problem if nothing else plus my bike runs a bit smoother on a new plug. the starter gear that you mentioned will sometimes rattle at those speeds mine does but my exhaust is pretty loud so i don't hear it anymore some people on here have fixed it but you would have to search the forum to find that solution as i don't remember how. if you're hitting 40+ i'm sure your scoot has been de-restricted so you may want to go up a little in jet size. also check your CDI (the little black box with the green plug in your battery box) to see if it has a cut in it, if not you should search the forum for cdi cut and go ahead and do it that could possibly help with starting and it will give you a good increase in power as it takes the rev limiter off the ignition. hope this helps :)
Yeah, my cdi has been cut into. I'm not sure if I have a smooth boss on the variator or not because I cannot take the variator nut off. Is it possible to buy the same spark plug from an auto parts store or do you think I'll have to order one. What size jet do you recommend for a stock dereistricted A50?
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Okay well I got it running and it seems to run fine but I still have this problem!!
Scooter on 7-27-2011 (http://www.youtube.com/watch?v=9cTitwJv7fw#)
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that sounds pretty nasty you definitely should get into your transmission and try to find someone with an impact wrench to take that nut off for you so you can check rollers, belt wear, your boss, ect and theres truly no real number for jet size every bike is different but you should be fine with an 85 jet just watch your plug good luck :)
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that sounds pretty nasty you definitely should get into your transmission and try to find someone with an impact wrench to take that nut off for you so you can check rollers, belt wear, your boss, ect and theres truly no real number for jet size every bike is different but you should be fine with an 85 jet just watch your plug good luck :)
I'm thinking of just buying an impact wrench (adjustable). Any idea on hot tight the variator nut should be when you put it back on? I'll post back when I can get this stuff off. What do you think of this belt and this plug.
http://www.monsterscooterparts.com/kymco-748-18-28-aramid-kevlar-gates-powerlink-scooter-cvt-belt.html (http://www.monsterscooterparts.com/kymco-748-18-28-aramid-kevlar-gates-powerlink-scooter-cvt-belt.html)
http://www.amazon.co.uk/KYMCO-Agility-NGK-IRIDIUM-spark/dp/B001GDGJ5A (http://www.amazon.co.uk/KYMCO-Agility-NGK-IRIDIUM-spark/dp/B001GDGJ5A)
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there are ways of take the nuts off your self just google remove variator nut from gy6 engine.
cant explane to you on here put all you need is a open end wrench and a socket.
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To remove the variator nut use a clutch holder and a 1/2" drive socket with flex bar.
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To remove the variator nut use a clutch holder and a 1/2" drive socket with flex bar.
I tried using this method. But to no avail.
How to remove the variator nut on a Kymco Super 8 (http://www.youtube.com/watch?v=zYCasW5pY24#)
I actually broke an socket wrench extension trying to do it.
(http://i.imgur.com/gC2mK.png)
I did see this post and figured something like this might have happened. http://scootdawg.proboards.com/index.cgi?action=display&board=discussion&thread=22383&page=1 (http://scootdawg.proboards.com/index.cgi?action=display&board=discussion&thread=22383&page=1) The thing i 've noticed is that the rattle only happens immediately after take off and at like 40 mph exactly. I can go over forty and it stops. I have also thought maybe it could be flat spots on the rollers but I can't get to them... :-\
To address the starting pinion/ bendix being the problem I did a little test. The results... :-\
Scooter on 7-29-2011 (http://www.youtube.com/watch?v=T-E65WAe-X0#)
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Cheap quality extension bar?
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Cheap quality extension bar?
Yeah, probably. Does the scooter just not run with the cvt case off or is my scooter just retarded
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I have never tried, but I think you would have to have the engine running first. Without nthe cover, you have no kick starter and nothing to hold the starter motor bendix.
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Woooooah !!! I would definately never start up my scooter like that with the cvt cover off :o
The starter bendix has nothing to hold it in place, ie the other side of the cvt cover, the bendix can rattle around and hit your outer variator givng you big trouble. If you need to run it with the cover off i would advise removing the bendix, putting the cover back on and kick starting it. Then carefully remove the cvt cover with the motor running. Only do this if you really have to tho, not just for fun.
I doubt your bendix is the problem anyway, if you look on the other half of the cvt cover you will see a small hole? That hole is where the end of the bendix goes into, that keeps it secure and stops it rattling.
You really need to get an impact wrench and get the variator off asap. Trust me you wil use the impact wrench again, to service rollers, clean clutch, change belts, etc, etc so its a good investment. Besides you dont want to break any more tools, or even your transmission trying other methods. Also make sure you ut some threadlock on the threads before you refit you variator nut or clutch housing nut if you remove them.
My guess is either your rollers are worn right down to the brass and it them rattling,OR, your variator ramp plate is loose on the boss and is rattling,OR, the plastic guides on the variator ramp plate have worn, come loose or broken. Either way, until you get the variator off and have a look, it could be any of these things, or something else.
Let us know what you find once you get in there :)
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Thanks for for reply streido, it was very helpful. Would an electric impact do? The air compressor I have access to only has like 2.6 CFM at 90 psi. I saw some at lowes that had a cord and was like 350 lbs/ft.
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Yeah,electric would be fine. Mine is 350Nm torque,works just fine. Its only 12v tho so i used to run it off my car cigarette lighter or battery,then i worked out i could use my car battery charger. It gives out 13v so i just hook he clips upto it and just plug the charger into the mains. http://www.ebay.co.uk/itm/ws/eBayISAPI.dll?ViewItem&item=190499146513 (http://www.ebay.co.uk/itm/ws/eBayISAPI.dll?ViewItem&item=190499146513)
Ive had my variator and clutch off loads of times with it and never had any bother at all.Just remember the threadlock when refitting cos you dont want the nut flying off when riding :o
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Scooter on 7-30-2011 (http://www.youtube.com/watch?v=VFIsvOFRzzc#ws)
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Did you ever figure out what that rattle was coming from the trans area? Mine does the same thing since I got it, only at certain speeds like yours. I've been thinking its just the variator face plane or cover whatever its called but not sure.
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Hey, a little off topic, but is the first video mirrored or left-right-reversed or are there huge diffrences on the model youve got, and my 08 agility`? :D
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Hey, a little off topic, but is the first video mirrored or left-right-reversed or are there huge diffrences on the model youve got, and my 08 agility`? :D
Yeah the first video was filmed with my macbook camera and is reversed. The others are filmed with a flip camera. And no Kenho, I haven't figured it out yet. I don't think it's hurting it. I don't know if it's the valves or something weird I haven't thought of. Maybe changing the rollers would solve the problem?.?.?
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The scooter should run without the cover on the cvt. Make sure you hold in the brake to start, like you always do, but somehow forgot while working on the bike.
An impact wrench will get the nut off. I use it to put it on as well, which is risky. Get a clutch holder tool and better quality wrench.
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Dogov- Yea I am thinkin its the variator face cover since I just installed a 70cc kit in mine and am still hearing the exact same noise at the same RPM's as before when it was totally stock. I'm about to install a new variator soon though and hoping that takes care of it. I will keep ya updated...
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If its not the back plate on the variator or the plastic guides on it then when you got the outer variator off leave the boss in place and pull out the variator a little so you can check for play on the boss. If its a cheap chinese boss it may be milled a little too small so your variator can wobble slightly on it. I only noticed he difference on mine once I lathed my stock kymco smooth myself and compared to the chinese boss it seemed to fit better. Maybe your is slightly worn down?
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i had a noise like that too .. to be honest 2 times !
the scooter was ok, the nr.1 problem was the center stand! after i took it off i liked so much the scooter sounded that i only put i back 2-3 days after.
the second problem was one bolt from the exhaust. not the bolts to the cilinder but one of the bolts on the right side that was holding the exhaust in place.
check this 2 , i was in the same situation as you, teared all the parts from transmision to find this 2 sh**ty screws.
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Well, I haven't figured out the problem yet. So far I've...
- taken off the starting bendix
- taken off the kick start part
- checked a bunch of nuts and bolt for tightness
- completely cleaned the drive face, rollers, ramp plate, variator, fan
- made sure the variator and boss fit flush and everything lines up nice
The only thing I haven't done is messed with the belt or the clutch....ugh
Also what is the stock roller weight? I'm going to try to order some new ones before I go onto anything more expensive.
Kehno, have you installed a new variator yet by chance?
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No, and I hate myself for it. That's the last upgrade I want to get done before the end of the season right now. I am hoping that will eliminate the noise. I think I'm going to be going with the Malossi Multivar variator though looks really nice and have heard good things
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Dogov, the stock weight is 6.5g. They feel too heavy for me tho so I prefer 5.5g.
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No, and I hate myself for it. That's the last upgrade I want to get done before the end of the season right now. I am hoping that will eliminate the noise. I think I'm going to be going with the Malossi Multivar variator though looks really nice and have heard good things
Have you installed that variator yet? Still haven't got down to the bottom of this.
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Hey DoGOV,
Not really being helpful here, but wanted to thank you for your videos. I am not a motor head and I know I will need to change my rollers and belt soon, and having seen what it looks like apart will really help.
Thanks for posting, I don't have the equipment necessary to record video for my en devours, but that sound you hear sounds familiar a little. When I get to top speed ~40mph restricted I hear like a Cicadas sound --> http://youtu.be/7Q7cx8i4lUk (http://youtu.be/7Q7cx8i4lUk) which is pretty close.
Again, thanks for the videos, I just changed my oil for the first time today, so that tells you how new I am to this. Also, looks like we have about the same miles on our bikes, I wish mine looked as good as yours. ;)
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Greagle, I can assure you that yours looks better than mine right now, bud. Wrecked it two weeks ago. Still trying to fix the alignment but I just haven't had much time to. Glad I could help. I was thinking about making some how-to videos for the Agility 50 just for the fun of it.