KymcoForum.com
Scooters - 50cc => Vitality 50 => Topic started by: thelastkahl on May 08, 2010, 05:58:56 PM
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Let me start off by saying that I am new to this. I have been reading forums and posts on how to take restrictions off a Kymco 50 cc 4 stroke scooters daily but have unsuccessfully found any specifics on my model scooter. I spoke to a scooter mechanic on the phone that explained to me that their is a restriction on the CDI unit which can be removed and a washer or "spacer" in the variator. Another mechanic said that I would have to completely replace the CDI with a No Rev Limiter unit and replace the boss in the variator with one that doesn't have a shoulder. I found the CDI under the seat and attached a link to where you can view a few pictures of it. Like I said I am new to this and would appreciate any help. Thank you in advance.
http://cid-da80bd52d440bde2.skydrive.live.com/browse.aspx/CDI%20on%202006%20Kymco%20Vitality%204t (http://cid-da80bd52d440bde2.skydrive.live.com/browse.aspx/CDI%20on%202006%20Kymco%20Vitality%204t)
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..Welcome to the Forum thelastkahl!!..
..your cdi requires that the corner be "notched" in order to cut a wire that is internal of the cdi casing.
..remove and unplug the cdi..using a hacksaw or a dremel type tool, make a cut on the corner of the casing, exactly like in the 2 top pics below...
..the bottom pic is of my cdi, and shows just how far you CAN cut without hitting ANYTHING internal....
..doing this will gve your scoot better performance overall...
..also, here is a link to the service manual for your scoot...
"http://pdftown.com/PDF-Kymco-Vitality-50-2T-4T-Service-Manual.html"
..aaannnd here is a link to all kinds of parts for your scoot...
"http://www.exportstrength.com/index.php?cPath=22_70
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Good lookin' out slinger!
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..gotta helpa brother out!!..
;D
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..yo thelast... :-\
...that service manual link i posted doesn't work....I've had one helluva time finding a good link to that manual..but if you will go this.....other....scoot forum......(i feel like a traitor)... ;D ...and join up, you can then download a .rar file of the service manual for the Vitality 50 2t-4t...i checked it out, even d-loaded and unpacked the rar...it works bro....
"http://www.scootforum.com"
..they got's some kymco owners there...just glanced thru...imma see if anybody wants to come over here too...
peace
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Slinger's going fishin'. I'll buy the first dozen rounds!
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Okay. I made the incision on the CDI and... Voila! I peaked out at 38-39 mph which is better than the 31 mph I was getting before the wire was cut. Thank you again. Now it is time to move onto the next derestiction. I think I am just going to go ahead and order the new boss from scooter therapy store. Installing this does not seem as easy as just making a incision on a CDI. I have looked at the tutorial on the scooter therapy website and it looks like I might be able to manage, but any additional support would be great. Has anyone ever installed one of these? Anything I should be aware of or any common problems? Thank you in advance...
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The hardest part about installing the boss is removing the variator nut. Other than that its a piece of cake! You will either need an impact wrench or a variator holder to lock the variator so you can remove the nut.
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I use a nylon strap wrench. It is similar to an oil filter wrench. Please use Blue Lok-tite to secure the var nut when you re install it, or order a new nut as they are intended to be used 1 time and thrown away. http://www.grainger.com/Grainger/items/2DFD5?Pid=search (http://www.grainger.com/Grainger/items/2DFD5?Pid=search)
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I think I am going to buy a cheaper impact wrench online to use for the nut in the variator. I also watched this great video Kymco Super 9 AC Variator and rollers (http://www.youtube.com/watch?v=QAcsjMdJfGs&feature=related#lq-lq2-hq-vhq) on youtube and thought that maybe I should swap out my roller weights as well while I am exchanging the boss. Does anyone have any suggestions on roller weights and or brand names? Another question is, is it possible to buy a replacement nut for the variator, as I read above is to be used just once? Thanks again...
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http://www.stadiumyamaha.com/pages/parts/viewbybrand/default.aspx (http://www.stadiumyamaha.com/pages/parts/viewbybrand/default.aspx) That is the best shop (in my opinion) for oem parts. The stock rollers are supposed to be 6.5gr. If you replace w/ either 5.5 0r 6gr. you will see better take off, and throttle response across the board. You will also be reving higher, but nothing the engine can't handle. I use Malossi rollers, but to make a 1 stop shopping trip you can order the var. nut, and the rollers from stadium. the oem Kymco rollers are just fine for a "stock" scoot.
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Here's the impact wrench I use. I think I got it on sale for $35. http://www.harborfreightusa.com/usa/itemdisplay/displayItem.do?itemid=90798&submit2=find+it (http://www.harborfreightusa.com/usa/itemdisplay/displayItem.do?itemid=90798&submit2=find+it)
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Hi all,
New here I have the vitality 50 2t. Will the cdi mod work the same on mine as well?
Also i have both the service manual and owners manual if anyone needs them.
Brian
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Hi Brian, Can you post a Pict. of your cdi, or give us the wire colors? There are many different set-ups depending on where the scoot was marketed for, and the details help. There is a thread under the general section for manuals. Try looking thu those, and see if the one you have has been posted. If not it/they are a welcome addition. Welcome aboard B.
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thanks for the quick response Zombie. I'll get pics tomorrow, I have the scooter at work until i get it running right and insured.
Brian
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There are 15-20 people here willing to get you going, and maybe 2-3 that care about INSC. Won't tell you where I fall in the mix. Even posting the colors will get you where you want to be. Kick A$$ TREVSN!
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Hey there Brian. I just made the "incision" on my CDI on my 06 Vitality last week and got 5-7 more mph. Take a look at these pics of my CDI before I cut it. My CDI is located underneath the seat. These pics are of the CDI still attached...http://cid-da80bd52d440bde2.skydrive.live.com/browse.aspx/CDI%20on%202006%20Kymco%20Vitality%204t (http://cid-da80bd52d440bde2.skydrive.live.com/browse.aspx/CDI%20on%202006%20Kymco%20Vitality%204t)
If it looks like this, than you should be good to make that cut...
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Hey guys Mine looks a lil different than that. Here are the pics Now keep in mind tht I could be totally wrong about it being the cdi If so please let me know
First and second are the top and bottom views. the top says "d406"
the third and fourth are pics of where its located.
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Here's the other there are only 3 not 4 Thanks again
Brian
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..tresvn, either you have some emormous hands!!!, or that's the smallest cdi i've ever seen...
..damn....
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Tresvn, that is exactly where my CDI was located on my Vitality. However your CDI is smaller than usual or your picture portrays it to be smaller than it actually is. But then again, I do own a 4t not a 2t so that may have something to do with its size...
I ordered my unrestricted boss for the variator yesterday and should be installing it by Saturday. I will post back with results...
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I'd say my hands are average. I'm 6'1" and 165 so im not all that big but the cdi or what i think is the cdi is about 1'x1"x2 1/4" ish. I watched that video and am thinking about doing that as well. All this is after its running right but I'll start another thread so I don't hi-jack someone elses thread
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I ordered my unrestricted boss for the variator yesterday and should be installing it by Saturday. I will post back with results...
..yeah man, post back!!..we love to hear th' results!!!
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My bad TRESVN, I needed the colors of the wires in the pict. If that is the one I think it is I have a link for a good replacement about 1/2 way down that page is a cdi for the zx/super fever. It does NOT work on that scoot but it does work on 5 wire DC 12v set ups. Post he wire colors, and I'll let you know. http://stores.ebay.com/daywot_PERFORMANCE-PARTS_W0QQ_fsubZ2QQ_sidZ20577706QQ_trksidZp4634Q2ec0Q2em14?_pgn=2
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I have a question about changing out the stock main jet? Is this a restriction? I'm not sure what the stock main jet for my Vitality even is...I have looked at a couple of the other threads but they usually relate to adjusting the carb after installing a high flow air filter or a performance exaust. Should I be messing with the main jet if I am not making these modifications? Also I have been reading a lot on tuning the carb and still feel like this is way over my head in terms of "mechanical know how". Is it worth getting these upgraded parts (high flow air filter/Exaust) if I'm not even sure I can handle rejetting the carb?
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You shouldn't need to mess with the jetting unless modifications are made. If you do an air filter and/or exhaust you will definitely need to jet. Otherwise, in stock form it should be set up properly.
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And it is well worth tuning the scoot IF you don't mind lousy MPG. (about 1/2 or less of the stock scoot) If you need some speed from a 50cc then it is all fun!
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I forgot to check the wire colors but do have pics. Looks like 4 wires, Black and yellow, black and red, blue and yellow, and green. I managed to get it up to almost 30 mph then i ran out of driveway. I'm guessing i shouldn't expect much more with what I have.
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That is 1 I don't know. maybe someone else, or try Kymco USA Tech support. ( I would call)
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Installed the unrestricted boss into the variator (CDI already cut)...Voila! 47 mph on a straight-a-way and 50+ on down a steep hill. Can't beat it. Very happy. Okay boys tell me what's next. Anything else you suggest for me to get the most of this 50 cc scooter? I'm not ready for a BBK install. But if there are some other small projects I am on board...Thank you all again for steering me in the right direction on this...especially Zombie and Slinger...
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Congrats on the variator bushing and new found speed! I see you caught the "tuning" bug! Next step would be tuning the cvt for a bit quicker acceleration. You can go a little lighter on the rollers for better acceleration throughout the range and stiffer on the clutch fly springs for the quick launch off the line. I would think about 1g lighter on the rollers and 1500 fly springs. Once you find the optimum roller weight I recommend getting some Dr. Pulley sliders in that weight. They will give you smoother acceleration and an extra 1-3 mph possibly on the top. Beyond that you're looking at a new exhaust and open K&N type air filter accompanied by up-jetting the carb.
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..I love it when a plan comes together...
..Way t' Go kahl!!!
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Thanks Shaka. You have been a great help too...I might go with some lighter sliders...
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...you definately want lighter rollers with your 4t...get's those rpms up, and all 4t's have an issue with keeping revved...
..that's how i can tell when i've got anything wearing...
..my scoot's "rev-ability" drops....
..then it's just a small matter of determining what's causing the drop-off...
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That is 1 I don't know. maybe someone else, or try Kymco USA Tech support. ( I would call)
I emailed them and here was thier response
I apologize but we are unable to discuss this operation with anyone other than our dealer network. Please contact your authorized KYMCO USA dealer for information on this subject.
Looks like no help from them. Theres an authorized kymco guy not far from my job may swing by there one day
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...wow...that sucks....cuz it looks like nobody here knows a damned thing about that cdi...it's different...
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yea i know. will rollers or the shaved down washer help with out the cdi?
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yea i know. will rollers or the shaved down washer help with out the cdi?
Yes they will! You will not see the full top end performance, but will gain on acell. Once the cdi is done the scoot will just open up for you.
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I have decided that I am going to put some Dr. Pulley Sliders in the Vitality. I am thinking 4.7 grams. Any advice on where to get these? Am I going to lose top speed? Anyone know what size roller I need in a 2006 Kymco Vitality 4t? 15x12 ?
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..i know you can get 4.7 in Leo Vince brand...
..google that...
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Your's are 6.5gr. They are thee same size as the S8 4t, and the Ag 4t. Slinger may have the size for you
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...yeah, i'm liking my 4.7s pretty well...
..but i think 4.5s and a 1500 spring might get th' rpms up better on the bottom and mid ranges...
..i wanna try it..
..hey zombie, the malossi variator is 90mm...
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The last was looking for the dimensions of the rollers. 16mmx? 15mmx? There MAY be an over-range clutch to go w/ the 95mm var. I'll start looking...
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Anybody know or where a good place to start looking on the web for the dimensions of the rollers in a Vitality 4t? Or where to buy a cheaper Electric or Battery Operated Impact Wrench. I don't think my Air Compressor is big enough to drive an impact...
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The impact comes from Harbor Freight. It's under $40.00. I'll look for the roller size. http://www.ecrater.com/product.php?pid=6250279 (http://www.ecrater.com/product.php?pid=6250279) 16x13mm
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Hello again. I ordered an impact wrench, and am trying to find a a site to buy both dr. pulley 5 gram sliders and clutch springs. I am thinking 1500 as I have read that 2000 is probably to stiff. Any recomendations on the smaller springs? I saw that you can buy a set which comes with three different stiffnesses... Any advice at all when it comes to these clutch springs is greatly appreciated...
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That link I posted goes to enviromoto (Drmoto from the forum ). He can hook you up! The Mid set of springs generally work the best for a non racing set up. The stiffest are for pure drag set ups, and the waekest are better than stock but the mids do better