Mid to Top end power issue

[vdubn]

Could the choke be stuck on?  If so, how would I tell?  There are no issues starting, cold or warm.

[zombie]

Pull the unit out of the carb/make a mark on the small pin/turn on the key. The pin has to move 4mm min.

[vdubn]

If no movement, is it stuck on or off?  In other words, if its defective, does it automatically fail on, so I would get a rich condition?  I figured it would fail off, so potentially cause cold-start problems.

[zombie]

What happens is it fails ON. It is a wax filled element so as the bike warms up so does the choke. It may warm enough to close but rarely does if it is a mechanical failure vs an electrical failure.

[vdubn]

Good call, thanks... I didn't know.  So, if its defective, which it probably is.. is there a way to bypass it or elliminate it (other than replace the carb with a manual choke or get a new electric choke)?

Thanks

[zombie]

New electric for OEM or a better carb. You can get a whole carb on ebay for parts CHEAP. 25 bucks/free shipping/usa sellers... You'll have one in a few days.

[vdubn]

Any recommendations of where to buy a better carb, that won't break the bank?

[zombie]

http://www.spi-parts.com/
http://www.racingplanetusa.com/
http://www.treatland.tv/
Mention the forum at any one of them.

[vdubn]

Alright, I'll start looking... after looking it over, I bet that is the issue, and would explain all of the smoke as well.

[zombie]

I've choked out a few shops.

[spidrgr]

Nowhere you mention if it is a 4 stroke or a 2 stroke...you mention you have a light grey plug. Running hot, which means too lean with gas. It seems to confirm your stumbling problems. Can you see if your airbox is stock. If too much air gets in with the stock jets in the carb, it will run lean. Try closing the air intake a bit to see what happens. Usually, a lean engine runs better when ambient air is warmer.

[vdubn]

Its a 2 stroke engine, and a 2001.

Can anyone tell me if the following intake will work with the Kymco 50:
http://www.scooterworks.com/NCY-Aluminum-Intake-Manifold-Yamaha-Minarelli-P7525.aspx

I found a 19mm aftermarket carb, and this intake, just wanted to see if anyone here knows if it will work? 

Here is the carb kit that I was looking at as well:
http://www.scooterworks.com/Malossi-Carb-Buddy-50-People-Cobra-19mm-P2328C509.aspx

Just curious if this would be a decent option?

I also found this racing carb, which I ran on my sons 90cc ETon ATV, and it ran pretty good:
http://www.racingplanetusa.com/carburetor-naraku-21mm-p-21455-1.html?cPath=2_18_106&sessID=eb5e23d7ec0bd302e8cad651d6f56cbc

Your thoughts...

[Peters]

Generally a People 50 is the 2t and People 50 s is 4t

Not sure about that intake

The Malossi carb kit is excellent. It's what I have. It's actually a Del Orto carb but a malossi kit. Del Orto carbs are top of the line. Never had any issues with mine. You'll love the manual choke too. I hate auto choke. You may be able to find it cheaper than Scooterworks. Much cheaper here and you should get a forum discount : http://www.racingplanetusa.com/carburetor-malossi-phbg-19mm-kymco-sf10-p-314-1.html?cPath=2_18_106&sessID=0b7a6bfa6ae6650a1fc6b723da4d6e62

[vdubn]

Perfect... so did you need anything else with that kit?  Aircleaner, intake, etc.?  If not, I'll just grab that one.  Also, I'm guessing that it uses Dellorto jets... what size main jet are you running with your 70cc kit and that carb?

[Peters]

Nope, the kit has everything you need. Will work with stock intake and air box.

I'm at about a 98 MJ with the Malossi BBK, Tecnigas Next R, and Malossi 19mm carb kit. I have about 8g rollers with malossi variator, yellow clutch springs, and red contra spring.

This 90-110 set should cover all bases:
http://www.racingplanetusa.com/main-sets-naraku-dellorto-carburetor-p-23453-1.html?cPath=2_18_106&sessID=0b7a6bfa6ae6650a1fc6b723da4d6e62

You'll want a wide range of jets to make tuning easier.