speeding up a people 50

[dreflu]

hi everyone still new to this forum but i like it! i got a 2001 kymco people 50 i got a race cdi box. and a tecnigas next 2 pipe on the way. what other mods can i do besides the cylinder head to speed it up on the top end? i can get about 44 out of it now. hopefully the pipe gets me over 50. anyone got one of these?

[dreflu]

i've heard about buying bigger jets. are aftermarket carbs that much better than a stock one with bigger jets? and i thought about a bigger bore but i'm not sure i could do it. dont want to tear my engine up. and are the big bore kits under $200 any good?

[zeonsredcomet]

The first scooter i ever rode was an 05 Kymco vitality 2 stroke and it did about 44 MPH. :) my EX girlfriend still has it and iam probably going to modify it for her depending on if she wants to or not.

Peoples have very large rims and so forth.
Do you have the 2 stroke or 4 stroke version? I hope its the 2 stroke :)

If you have the 2 stroke then this would work for you http://www.provoscooter.com/scooters/malossi-cast-iron-70cc-cylinder.html

If you have the 4 stroke then this would work for you http://www.provoscooter.com/scooters/malossi-aluminum-85cc-cylinder.html and both would be easy to install and excellent results AND very reliable since its malossi which is the BEST in scooter performance and quality closely followed by polini and athena.

[dreflu]

i have the 2 stroke. i'm guessing i have to go big bore. are they hard to instal? i've never been inside engine

[dreflu]

malossi sport, athena aluminum cylinder, and a top trophy kit are great cylinder kits for under 200

a 17.5 carb would be perfect for a sporty build.if thats what your looking for. a 89 jet would work great aswell with the stock airfilter and depending on your pipe 5.5 and 4.5 weights would work with the setup

a malossi yellow contra (torque spring) is recommended when tuning a motor with a large expansion pipe on it.

so i can keep the stock carb and just buy bigger jets? and i got a tecnigas next exhaust.

[dreflu]

first off stop riding on malossi.malossi isnt the best in performance and second its all on the build

youve never dissasembled a GY6 4 stroke before? i mean actually dissasemble not take off a plastic cover it is not "easy" to take apart a 4 stroke.you mess up the timeing there goes your valves.

2 stroke is simpler.

dont take it the wrong way furher im correcting your post.unless provo has a issue and has to delete this informative post aswell.

do i have to mess with the timing on a 2 stroke? i've had the valve cover off a 4 stroke before and i would even think about pulling it apart. but when i look at the big bore kits for this it doesn't look like i have to deal with valves and a timing chain

op on a better kit?

[dreflu]

so the kit just bolts on that easy?

[dreflu]

is it just the bolts threw the head holding it on? cause if it is i'm sure i can handle it

[Blackbomber]

Once the exhaust is removed, it really is just those four bolts. Unless your motor feeds the carb through the cylinder (like a Minarelli vertical). But since you will probably be changing reeds, it's the same ammount of work regadless.
No real "specialty" tools are required, unless you consider an in/lb torque wrench, and feeler guages (for measuring ring endgap) specialty.
You can do the job with the motor in the frame (as I do). I recommend removing the motor for your first time, though. You will have a much better view of what you are working on, and can do it on the workbench (or kitchen table, baby changing station, etc).

[zeonsredcomet]

baby changing station, etc).

That made me LOL big time..laugh..

[Blackbomber]

That reminds me, I left one of my kitchen measuring cups in the garage from when I changed my final drive oil.

[dreflu]

thanks. when i heal up imy try it

[zeonsredcomet]

IF/when you do let us know and i can walk you through it by phone!
Just private message me and i will give you my number and so forth.

Also this is the greatest place for support as well dont forget that too.

[dreflu]

thanks!! i can see it in parts in my basement now. lol! hopefully the pipe gets here soon. i cant wait to see if i would be able to tell a difference. i may be able to live with that

and from looking around i think ihave 8.5 rollers stock. what would be a good weight to try or leave it be? i weigh 210 i know your weight has something to do with it

[Blackbomber]

I missed the post about you getting a pipe. What did you go with?

[harry]

you want lighter sliding weights than the stock roller weights

oilyhans

[dreflu]

I missed the post about you getting a pipe. What did you go with?

tecnigas next r. i opened up my main jet one size and put the pipe on but i'm getting no more top end! what can i do to get more top end with what i have?

[Blackbomber]

Do a plug chop to verify your air/fuel ratio is acceptable.
Double check your airbox and intake connections for vaccum leaks that might have been introduced if you had the carb off for jetting.

If your belt is worn, replacing it can restore some lost top speed. Also installing an aftermarket variator can make a difference. But if the Next R provided no noticable gains, figure out what is going on there before proceeding. I never piped a stock motor, but the overwhelming consensus is that it makes a distinct improvment.

[dreflu]

i've played around with the mix but no real change. gonna search how to do the plug chop and try that next. then look @ that belt. i got the ngk iridium ix plug. it said not to gap. does it need to be? gonna try opening the main jet one more size. a different variator can change top speed?

[Blackbomber]

I'm not sure about the iridium plug.

Do the chop before touching the main again, just to get a baseline of where you are. You will find the procedure here, and a chart in the Wiki on provoscooter.com

If the Variator is larger in diameter, it will create a taller ratio (assuming your belt is wide enough to ride that far up). It is also re-ramped for an acceleration curve that takes advantage of an uprated engine. It can get expensive once you add in the outer pulley, and a roller tuning kit. I would concentrate on making sure you are getting the most out of the existing setup first.

[harry]

do not gap that plug you will break it.
also what size carb and jets are you using?

oilyhans

[dreflu]

do not gap that plug you will break it.
also what size carb and jets are you using?

oilyhans

stock carb. stock jets. i opened up the main one size with torch tip cleaners.

and on the plug chop i get a new plug run at wot for a while cut the engine but coast @ wot pull plug and it needs to be brown? that about right. im so lost on the right or easy way to tell. HELP!! lol

[dreflu]

time for big bore kit. op on best ones? and how much more power does porting give you?

[Blackbomber]

The effect of porting depends on the cylinder you are starting with, and the skill of the person porting. That's a question best left for later.

As to the choice of cylinders, there are lots of great choices. Which is best depends on your needs. I knew from the beginning that running a loud pipe is out of the question. Therefore I knew my setup would not be high revving, therefore a Sport level cylinder was the way to go. Among the choices I had, I selected the Malossi sport, due to familiarity with the brand, lots of people using it (so I could predict my results better), and it's cast iron two ring construction. That last point is highly debated. I myself would not want to use cast iron for a hot street setup, but for my low revving quiet torquey needs, it is my first choice. I'm very happy with my choice, but next time around, I'll want more power.

[dreflu]

The effect of porting depends on the cylinder you are starting with, and the skill of the person porting. That's a question best left for later.

As to the choice of cylinders, there are lots of great choices. Which is best depends on your needs. I knew from the beginning that running a loud pipe is out of the question. Therefore I knew my setup would not be high revving, therefore a Sport level cylinder was the way to go. Among the choices I had, I selected the Malossi sport, due to familiarity with the brand, lots of people using it (so I could predict my results better), and it's cast iron two ring construction. That last point is highly debated. I myself would not want to use cast iron for a hot street setup, but for my low revving quiet torquey needs, it is my first choice. I'm very happy with my choice, but next time around, I'll want more power.

thanks for the reply. so you're saying dont even try to port it and get the airsol aluminum kit right?

[Blackbomber]

I am not saying to not port it. I do think you should bolt on whatever you chose, and worry about porting later. I have hand ported literally hundreds of four stroke motorcycle cylinder heads. I have the mechanical skill and tools. But I'm not confident about taking the die grinder to my cylinder until I understand two stroke porting a bit more. And then, I will do it to my stock cylinder first.
I'm thinking since you are asking about it the way you are, you would do well to wait, as I am.
I can't comment on the Airsal since I have not tried it. I have read both here and on other forums that it is simply the best horsepower-per-dollar cylinder you can buy. Do your own research, see what Airsal owners have to say, and you won't go wrong. The main reason I didn't consider the Airsal myself is that it is designed to rev higher than I intended my setup to rev. Therefore I didn't feel it would be a good match for me.

[dreflu]

thanks. i guess an arisal it is. and i may be able to get it ported local