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Post by mpw2012 on May 4, 2012 16:40:30 GMT -5
I have a Kymco Super 8 150 cc... It has 8500miles on it..
For the most part, it has served me well.. until recently (past 6 months).. First, my exhaust fell off!! Had another one ordered from Kymco.. had it installed.. (poor workmanship)..
Ran great,, until the other day, when I engaged the throttle, full out, the bike just kind of puttered along.. It didn't increase in speed; and, it started making a sort of "sputtering" noises. It was like a car stuck in first gear, even though you are giving it gas.
I've had several people look at it,, and noone seems to be able to figure out what the problem is. They all say.. "it could be any number of things"..
Can someone please tell me if this has ever happened to you ? What was the problem? and hopefully,, how did you fix it.?
I am beyond frustration..
Thanks in advance for any and all ideas..
I'm a newbie,, thanks for the privilege of joining..
Mary
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Post by dudley on May 4, 2012 18:11:43 GMT -5
Has not happened to me, but I am only at 4500 miles.
Carb needs cleaned maybe?
How long since you checked spark plug.
Sorry this happened.
A good mechanic should be along to give you better answers shortly.
Are you still under warranty?if so have the dealer fix it.
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Post by dyoung1167 on May 4, 2012 18:58:11 GMT -5
what you describe is more like stuck in 5th gear. pull and check your variator, it may not be opening all the way to allow a lower gear ratio for take off.
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Post by mymomwantsatrike on May 5, 2012 0:37:36 GMT -5
who are the "several people?" are they familiar with Kymco's? sounds like a minor issue. its not related to the exhaust swap, most likely. so don't go down that path. need more info, kind of. when was its last service? what was serviced? this could be any number of things as some have said, but its not something to "figure out" or guess at. its easy to get at the CVT and look in there. just take the cover off. cleaning the carb is easy enough, etc. it all sounds tune up / fuel related, or something very minor. "could be anything," sure. but thats easy to say when was the last time the scooter was serviced? what kind of riding is done, etc? how often is it rode, and has it "sat" for a period of time? ever, i mean? here are more scooter forums: www.advrider.com/forums/forumdisplay.php?f=36www.kymcoforum.com/index.php?board=32.0if the scooter has never had anything more then oil changes and perhaps the air filter and things like that....it could be time for more preventive care to be done. and an inspection by someone who can look at the mechanicals and troubleshoot this. or, are you comfortable taking instruction and getting your hands a little dirty, yourself? you can do a few things we can suggest with just a bit more history of the scooter, how it is run, and how its been cared for. |
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Post by mpw2012 on May 5, 2012 10:40:51 GMT -5
Hey.. thanks to everyone for their quick reply...
Mymomwantsatrike had several questions re the problem, and I'm going to try to answer as many as I can, with the hope that he might be able to help me?
My scooter has been serviced routinely, as the manual suggests, at the various intervals.. (routine maintenance)..
Recently, the exhaust pipe fell off.. Had to have the whole exhaust system replaced. Took it to an authorized Kymco dealer.
They ordered a replacement, and installed it. After riding just about 15 miles, the bolts they used to secure the exhaust , started falling off. Finally after several trips back and forth.. the problem was resolved and it seemed to running great again.
Out of the blue, I was riding, came to a stop light, and when it turned green, gave it gas, (throttle), and it barely moved... Wouldn't go above about 5 or 7 mph. That was with the throttle wide open. Then suddenly, it started picking up speed.. Eventually got up to 50 mph, but when I slowed down, and tried to accelerate again,, the same thing happened..
Also,, when I let up on the throttle, it didn't slow down right away.. it was like a second or two after I'd let up on the throttle.
More often than not, when idleing,, it would cut off after a few seconds.,, unless I opened the throttle again..
This scooter is my primary source of transportation.. I've had it 1year and 9 months,, has 8500 miles on it.. I take it on the interstate.. Most of my riding is on the interstate.. Going about
65 to 70 mph without any stop and go , for about 15 minutes.
It never sits, unused for more than a day. I live in South Carolina, so the climate permits year round use.
I take very good care of it.. routine maintenance, etc.
I do not mind getting my hands dirty.. would love to have some help on things I could do myself to try and resolve this problem.
Seems everytime I take it to the dealer,,, I end up having more problems than when I first took it in. Not to mention, it costs a fortune to have them pick up the scooter and take it to their shop. It's a good way out from my home. Can't drive it there because I don't trust it. Wouldn't be safe.
Thank you for all your help.. I'm sorry if I seem "dense".. Not real experienced in all of this.. so please don't hesitiate to be very specific and detailed in any suggestions.. You can pretty much assume, I don't know correct names of parts etc.. I do have someone who works on scooters that is willing to help me,, so if you can give me some suggestions,, even if I don't understand it.. maybe he'll be able to follow your instructions.. Ok?
Thanks again for your help, and your patience..
Sincerely,,
Wantin' 2 Scoot Again,, in SC
Mary White
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Post by ce on May 5, 2012 15:06:08 GMT -5
After 8500 miles, you need a new belt, new rollers in the variator, new spark plug, and an all over checkout for loose bolts and nuts.
There's two bolts at he bottom of the airbox, remove them and lift the airbox out of the way, then remove the CVT cover after you remove the kick start pedal.
With an impact wrench and a 17 mm socket, remove the nut holding the variator on, and slide the variator off after removing the belt which rides in between the two variator halves.
Check it all out, the Super 8 uses a standard GY6 variator and clutch like any other Chinese scooter, so you can replace them both for less than a hundred dollars, if needed.
The rollers in the variator are probabaly flattened, or one is out of position, but it's easy to check so let us know what you find.
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Post by mymomwantsatrike on May 6, 2012 8:09:21 GMT -5
i agree somewhat with ce about the CVT being a good place to start. because its hard to mess up, and parts are fairly inexpensive and easy to replace. the trouble with helping you like this is from what you say, it points to nothing. except lack of maintenance. now, that is not to say your shop has cheated you, but if you look at the service schedule up until just around NOW nothing is really required of your scooter except oil changes, a couple of adjustments, some minor inspection, and some minor "change as necessary" parts and this is the problem i have with dealer service, sometimes. you take it in, they turn a wrench a few times to change the oil and maybe give the valves a look, tighten things up, and charge you w/e they do for a "service." but if they are going "by the book" nothing has really been done up until now if they haven't bothered to do it on there own accord. so at around 10,000m people start having trouble and think "well it's been serviced." well maybe so. but maybe not as some might think. and the dealer says "gotta do a "BIG" service, now." which is fine if a person changes their own oil and and does their own minor maintenance and inspection for the first 10,000m or so. then they can just take the scoot in with a list and say "do this" and ride for another 10,000m. look here. sound familiar? scootdawg.proboards.com/index.cgi?action=display&board=discussion&thread=43331&page=1#429825could be your problem since the scoot is run daily and at WOT. i doubt it need a carb cleaning or adjustment because of what you describe. not really stalling, sputtering, back firing, no fuel issues. could need a spark plug like ce suggests. couldn't hurt, but i don't think the problem is in the ignition system either. i mean it could be the fuel system, need a valve adjustment, or a "tune up" so to speak. but with that mileage and if it has been "dealer serviced" it shouldn't imo. those things should have already been looked at. you mentioned "sputtering" and surging. could be the fuel system so clean the carb, too. could have clogged jets...but it shouldn't! not the way you run the scooter, and if it has been "serviced." which brings us back to "could be any number of things." YOU can check the CVT yourself, and all its components.. and your friend who can help you. this is a good but rough video of a complete NEWB doing her own on her scooter. it can save you money and time, and look at it this way. if you do find wear on some components or not, replace or not....you will have either eliminated it as the problem, or fixed it. and at the very least you may get some new stuff in there. here is the vid and this is just to show you how simple it is and tools you might need i mean, you're dealer should be able to disassemble this and check it in ten mins. if you want them to. but i think it pays to do this stuff yourself if you can i doubt your clutch is the problem but you might need new rollers and a belt. pretty minor stuff once you get the CVT cover off. just take stuff off and reassemble to spec. Super 8 oil change in case you're paying the dealer and would like to save time and money for real repair, such as this problem might require gear oil |
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Post by mpw2012 on May 10, 2012 16:23:59 GMT -5
Hey Mymomwantsatrike... Well,,, at long last,, I've done, or had done, everything I and my friend knows how to do. He is much more experienced than I.. The carb has been checked and cleaned,, as has the air filter, a new fuel filter was installed.. the gas tank was drained and then refilled, the CVT was checked,, and all was good there.(rollers/belts etc) After all of this... it is working slightly better,, HOWEVER.. and it's a big however.. it still is completely unreliable.. It still (more often than not) stalls out when idling.. You can prevent this sometimes, by opening up the throttle... but doesn't always work. There still feels like a slight delay in the time the bike reacts when you open up the throttle.. It starts off,(sometimes) slow (despite opening up throttle all the way)and then gradually builds speed. Sometimes I can hear it kind of "sputter" (sound) at times.. Bottom line,, I am beyond frustrated,, desperate, and getting very discouraged.. The bike is of no use if I never know when or if it will cut off.. and possibly not make it back home... Something just isn't right with it... One day it was fine.. and with no warning.. bam.. it started this crap.. excuse my french.. I don't even know what else to try or ask the dealer to check.. In all honesty.. my friend knows more about scooters than the clowns at the dealer.. I've had to have any work they did,, done over,, completely.. Please.. please tell me you know the answer.. and even better.. please tell me it's a very simple , cheap solution..  ? I know.. I'm a dreamer.. But all kidding aside.. (have to laugh to keep from crying),, if there is anything.. anything at all , that you may have to offer.. I would LOVE to hear from you.. or ANYONE with ANY ideas.. Thanks so much for your time and patience.. Desperate in Columbia,SC Mary (previously ,, once upon a time.. a scooter rider) |
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Post by frige on May 10, 2012 17:00:02 GMT -5
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Post by ce on May 10, 2012 22:05:41 GMT -5
We don't know what 'cleaned the carb means. Was the pilot jet a number 35 and the main jet a 110?
What position is the needle in the diaphragm at, top, middle, or bottom?
Were the valves adjusted to .004" intake and .004" exhaust with the engine at top dead center while cold?
You may have heated up the exhaust valve when the muffler fell off, and it may have closed up after that.
There is something constricting the flow of air or fuel at low end , and taht is governed by the pilot jet. If it is clogged, the engine won't run until the needle is lifted out of the main jet and the main jet provides the fuel to run at wide open throttle. You'll have to open the fuel bowl and check the jets, and open the diphragm to check the needle.
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Post by mpw2012 on May 14, 2012 11:09:14 GMT -5
Oh my gosh ce!! Whoa.. did I mention,, I'm not "mechanically inclined" Everything you said sounds like it could be a solution,, However.. I have not a clue what anything you said was, is, or how to do any of it... Sorry to be so dense.. I think I'm out of my league here.. I wish I could answer your questions.. I just don't know.. I didn't clean the carb.. someone else did.. that's all he said.. "I cleaned the carb".. I don't know how, or what that meant.. Just relaying what was said to me.. Again.. sorry for my ignorance.. Thanks for your patience.. I appreciate the suggestions.. I'lll print them out, and give them to my friend... Hopefully he will understand them.. He knows more than I do about all of this.. but.. given that I know little or nothing.. that's not saying much.. if ya know what I mean.. Seriously frustrated.. and without transportation... Feeling overwhelmed, and stupid.. Mary |
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Post by jinjin on Jul 12, 2012 0:48:07 GMT -5
Hi there, I can somehow understand how U feel with all this scooter trouble cos I've had them too, but maybe not as bad as yours.
I ride a Super 8 125cc, 3 yrs old, done about 21000km,had it since June 2009.
It performed OK until about the beginning of tis year when the power started to dip, acceleration from stops felt weaker and it started to hesitate when accelerating from any speed. I've taken very helpful advice from this forum (thanks guys! I've actually learnt quite abit from all of U!) and performed a few tasks,hoping to solve my scooter woes (adjusted the valves,cleaned the carb,ditched the secondary air intake unit,replaced the air-filter...etc) but the problem/s did not go away. In fact I had other new problems after all tat. Well, my fuel consumption went up (was 35km per litre, now 26km per litre!) & I started getting loud "gun-shot" noises from the exhaust whenever I closed the throttle while riding. Oh and it would also start stalling at the lights and won't idle steadily (rpm goes up/down like a see-saw). I actually gave up trying to figure wat's goin on and just endured riding it (meaning tat I had to pay more at the pumps cos its doin 26km to the litre, ignore the stares from fellow motorists whenever my exhaust pipe goes "BANG", ignore the guy behind honking me frantically to get a move on cos it just stalled and it takes a few seconds to re-start). Then last week, feeling beyond frustrated like U, I removed my seat, removed the auto-choke/fuel enricher (tat's the black thingy sitting slanted beside the carburettor body,held on to it by two small screws and a "half-moon" metal washer,suppose to aid cold starts & keep it idling high & steady for half a minute after U start it in the mornings),blocked up the hole left by the thingy and it now feels rather better (no more "BANGS" from the exhaust, just small "farts" at times, which are bearable). Fuel consumption seems to improve too cos the fuel gauge needle seems to be dropping slower (haven't checked,will need to wait till my next visit to the petrol kiosk to verify tat). Anyway, tat's just my story.
Well, here's hoping U get your problems solved quickly. And do keep a look-out for good advice from here, cos they have been very helpful to me and I'm sure many others too. Thanks! Good Luck & Cheerio!
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Post by Blueboy5000 on Jul 12, 2012 6:45:37 GMT -5
Sounds like you have a worn contraspring. I would check out the clutch.
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Post by ncc1701e on Jul 12, 2012 7:03:55 GMT -5
I had that problem also it was the air intake especially if its the kind u have @ the back ova the cvt w/all the vibration craks form and u get to much air
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Post by larrym on Jul 12, 2012 14:08:02 GMT -5
take it to a shop
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Post by jinjin on Jul 12, 2012 23:38:09 GMT -5
Wud love to let the mechanic at the shops do the checks/repairs BUT sometimes they are as clueless as we are,so they will recommend tat U replace tis and/or tat based on guesswork & guess who's footing the bill at the end of the day? Its better to have a little basic knowledge of ya scoot before U bring it to the shops,otherwise.....sorry,I'm not saying all mechanics are like tat cos there are good honest helpful ones out there too...and I've come across a few (thank God, but they're rather rare though...sigh)
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Post by ibtrikin on Jul 13, 2012 9:22:56 GMT -5
I'm kinda with Blueboy5000 on this one as far as the throttle issues. On the stalling issues you've got work to do. You need to adjust your valves and your carb. This isn't as hard as it sounds. Read this until it makes sense: x1scooters.com/pdi.html I still think you need a clutch and new weights and a cleaning in the variator and definitely a belt after 8500 miles. |
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Post by skishades on Jan 2, 2013 20:49:26 GMT -5
Had a similar problem while my scoot was under warranty. The scoot would die/sputter from a stop. Eventually it died at 1am on my ride home. Dropped it off at the scooter dealer and he figured out it was the needle in the carburetor, sticking preventing it from getting gas. The fix was easy... move the needle up and down but the problem came back a few weeks later. He ordered a new carb and it hasn't been a problem since.
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? I know.. I'm a dreamer.. But all kidding aside.. (have to laugh to keep from crying),, if there is anything.. anything at all , that you may have to offer.. I would LOVE to hear from you.. or ANYONE with ANY ideas..
