KymcoForum.com
Scooters - 50cc => People 50 => Topic started by: Chachivoodoo on July 27, 2010, 09:04:40 PM
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Hello-
I bought a 2005 KYMCO People 50 2t. The bike came semi de-restricted. The Variatior washer was removed.
I was able to de restrict the CDI unit by unplugging the green wires at the base of the unit. 2 seconds.
The bike went from 43 to 45 on flats,and 50 easy on downhill (MPH).
I added a Leo Vince TT pipe this am. The pipe also came restricted at the point of connection to the cylinder head. I removed the cone from the pipe by breaking the weld with a screwdriver, and using a dremel type stone bit in my drill to remove the chunks of weld from the inside of the pipe.
Once I got the cone off- I was able to install the pipe.
The stock rollers were too heavy- and the bike had a real hard time getting to speed- but once the powerband kicked in around 35, it pulled well up to 50.
I got scared and let off the throttle- plus the motor was SCREAMING. It's probably good for 55 with that set up.
Since I'm not looking for TOP END speed, I replaced the rollers with some supplied with the pipe= I think they were 5.7 g (I'll have to check the baggie).
The bike pulls hard to 45mph, and had plenty of acceleration.
Next I need to check the jetting by inspecting the plug and determine if I need to fatten it up or not.
No mods to the air box yet. That is next.
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No mods to the air box yet. That is next.
..you're on the right track!!..and definately keep an eye on that plug...
..opening up the air, and a larger diameter main jet will put you over 60 mph!!
..to reduce rpms at top speed, you might want to experiment with a SLIGHTLY longer drive belt...
..i started that process before my ppl stopped running..but i've continued with my agility, which uses the same OEM belt..
..i'm loving the 729-18-30 belt on my guilty..
..keep posting and Welcome to th' Forum!!
peace
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...there's peoples coming in from all over, art!!!
;D
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Sounds good you will be going back to some heavier rollers if you open the airbox and get your jets straight. You are going to want around a #95 main if you get all that done,should be 55+. Welcome to the forum.
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Ha! bout time people give the people a look, it's a great bike for the coin!
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..i'm running a 96 jet on my 2001, with a K&N filter, and the stock exhaust....
..i think, and art correct me if i'm wrong, there was a change in the stock exhaust for the 2005..
..more restrictive after 2004??
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Thanks guys for all the useful input.
I pulled the main and pilot jets out last night, can't read the Main Jet size, so I'm going to take it into our local shop and see if they can get me sorted out with some proper jetting.
Does anyone have a modification that I can do to the stock airbox. I'd like to keep the bike quiet- intake noise from a cone filter can get pretty loud!
If I leave the stock airbox does anyone have a suggestion for a main and pilot jet combo considering I am using the unrestricted pipe.
OR
Any suggestions to mod the stock airbox, and jetting combos for that?
Once I get that sorted out, I'll have to go back to tinkering with the roller weights.
Cheers-
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..art drills holes in the airbox...not sure exactly where...
..you will not need to change the pilot jet..only the main..
..idle mix adjustments can get you where you need to be without changing the pilot jet..
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Ok- great.
I ordered up an #85 main jet. I'll leave the pilot as is for now.
I'm going to have to wait until that bigger main jet comes in before I start messing with the airbox, I don't want to lean it out too much!
Other than that, I'm putting it back together, and going to ride it.
BTW- I popped the Spark plug out when I got home last night to take a look- looked nice and tan, no evidence of a lean condition. This was not done with a throttle chop- just wanted to eyeball it. Should I be concerned about a lean condition with the addition of the pipe?
Cheers-
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..it's always the possibility..
..put you a new plug in there and see what it does...
..some of us use torch tip cleaners to open the diameter of the main jet..and solder to melt them back if we go to far...
..i'll probably never need to buy another jet..lol...
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You are correct 2005 and later are more restricted 2008 to present realy restricted!!! I understand the noise concerns but you are kinda handcuffing your self with the airbox. I think the #85 main will be about right as is. I would put at least one hole in the outer cover of the airbox. I put it to the front behind the little flare,about 1\4 inch,this will let it breath allot better and stay on the quiet side. You may want to experiment with some more holes You can always tape them up if the sound level gets to high.
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..i would reckon that if you drill holes in the bottom of the box, then the "noise"..(I LIKE NOISE)..would not be as noticeable...
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Once the # 85 shows up, I'll pop a couple holes in the airbox and see what happens. Is there a proven diameter that gives better flow, without over doing it?
Trying to ride stealth by keeping the noise down.
You don't realize how much noise intake cones add to the dB level!
I like my neighbors, and they like me, and I want to keep it that way.....
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One 1\4 hole has been perfect for the almost stock set up. Havn't tried any more because all my others are way beyond stock!!!
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You don't realize how much noise intake cones add to the dB level!
..Sure i do!!..I have K&N filters on both my scoots!!
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Had some trouble this am with stalling at the stop lights.
After re-installing the stock jets- not sure what size.
It has a real cold blooded tendency off the line as it is- which leads me to believe it's the pilot jet.
So- I adjusted the air screw.
I was able to stabilize the stalling by screwing the air screw all the way in. It's still a bit flat off the line until the main jet takes over and the expansion pipe powerband kicks in.
All I did was add the Leo Vince unrestricted pipe- did not mess with the air box yet.
Would this affect the pilot jet?
Screwing IN the air screw indicates the need for a larger pilot jet, correct?
Should I bump the needle up a notch or would that not affect the low rpm/ throttle flat spot and stalling?
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Not the pilot so much the overall air is being restricted. You can move more air out than you can take in so the balance is a bit off. Need to do some jetting and let more air in. You should be at least one turn out on the air idle mix.
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So open up the air box? I thought I would need to bump the pilot jet up instead, since it's lean.
Wouldn't opening the airbox lean it out even more?
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I have never had to mess with the pilot on any of the people 50's i have owned(4). I think your out of balance or some thing else is going on. Maybe missed something when you were in there or need to clean carb. Your situation is a little different most people open the air first than the carb and then the pipe ;) the air idle mix actually works like this to my knowledge turning in is richining the circuit out leaning. You are closing an air passage as you turn clockwise and opening it counter clockwise.
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The idle circuit only affects idle,the off idle would be your needle and a bog would be a lean condition and a sputter a ritch one. Not enouph air can affect all this. The main kicks in about half throttle
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OK- got it.
What course of action should I take in order to correct the problem and get the air screw where it should be sitting?
I do not want to risk the possibility of a lean carb setting.
Cheers-
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It,for the most part,affects the idle. once it is good and worm turn counter clockwise till you achieve the highest idle possible in 1/8 to 1/4 steps(best to blip the throttle after each step). then turn back in 1\4 turn for optimum! This is usually 1 1/2 turns rouphly but varies and can change with mods.
Not having enouph air is more likly causing a rich condition to 1/2 throttle than as you hit the main it kinda evens out possible a touch lean. Your people wants to breath! upjets will be needed the more you open the air. I put the hole here behind the flare on the front cover.
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...what th' hell are you cooking art??...
..there was another person here, in one of these boards, that did the same thing, tried to install the exhaust without increasing air intake...
..don't think we ever got it figured out...
..CAN'T BE DONE!! ..
..scuzz...
..i'm just f*kin' with y' Chaciv...
;D
..just had to be there...
..now i'm rambling...
..dang, i just need to shut up and click on "Post"...
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;D ;D ;D ;)
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..lol..i'm just sayin...
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Gentlemen
I have a 05 since new.. just burned up a piston, want to do the work myself (san diego). Can I just hone the cylinder and add over size rings? what size?
Want to mill the head... 20 over good? Have a buddy with C&C
What type piston? Stock?
I can port, it's only worth it on exhaust port only... right?
The stock variator will never do it, always stuck as a 2 speed. Is Mallossi best? And do I keep stock clutch or is Delta good choice? I don't want to experiment and presently have a new Kevlar Mallossi.
I've jetted, added Vince pipe, de-restricted but want another level.
I like 50cc, big kit doesn't appeal at this point.
How do I know if the oil injection works? (just in case that was the culprit).
Okay... for now. I am trying to get this all at once since there are many pages out there. Thanks. Kragster ???
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Looks like a seller on eBay has a NIB factory cylinder for $30.00. Not sure if it's spec'd as a 2 cycle. Another has pistons & rings, they're spec'd as 4 cycle but 2 cycle may be available. Other sellers have the head assembly. Using your OEM #'s you can find the correct parts but do your homework and look for deals. If the crank and rod are good have your friend machine the piston pin & rod to a true round fit and finish it off with a valve job. Even if your friend has access to some CNC machinery considering shop time and trouble verses the cost of new parts I think you'd come out better to buy new parts. Maybe find a wreck that has a good engine and & replace yours. Cost for new stuff to rebuild looks like give or take $150.00 (and your time). Determining what made the piston crack is a difficult but important question (especially if you’ve done modifications). Get an expert to help you analyze or set it back to factory specs. Maybe it was running too lean and got hot? Oil pump maybe?
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I got the scoot out of storage and my goal for this year is to get over 50 mph. scooter is de-restricted, cdi is de-restricted. now I am going to pull the carb out and open the stock #85 main jet. I'm shooting for about .92mm on the main jet and at least one 1/4 inch hole in the filter box. Can't wait for slightly warmer weather!!