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What I figured. I'll take it off and check here in a little while.

7,000 miles and really only a clutch breaks. Not to bad

www.racingplanetusa.com/clutch-adjustable-evolution-racing-110mm-p-16112-1.html?cPath=2948_2954_2958&sessID=62bc0598bc6e72b63857d935a799c675#.Uo6Jf8Sfj6c


will that work?

Do you still have your old parts? Wouldn't hurt to swap a few back in and check for spark. Are you grounding the spark plug to the frame? Try a different spark plug? Is your battery charged? Check your ground wire?

Ok, I went ahead and ordered the carb from scrappydogs and some vacuum line. I wil let you know if i have other issue's once I install.

Ok, I have a 4 stroke Chuanl Longbo LB50QT-6. The engine says lb1p39qvb on the side.
www.longboamerica.com/product.php?productid=1&cat=0&page=1

I am having issue's with keep this thing running. To get the scooter started I have to put starting fluid or gas in the carb where the air intake connects. Once I do this the scooter starts and idles fine. Once I apply X amount of throttle the thing starts to die. If I remove the fuel line I have gas pouring out so I know that the carb is getting gas. Any Idea's?

Is this a main jet issue or should I just replace the whole carb with this one?

www.scrappydogscooters.com/Replacement_Parts.html
18MM CV CARBURETOR

This is a quality replacement carb for all 4stroke 139qmb 49/50cc chinese engines, NOT the junk that came with your scooter, it's got a larger venturi, accelerator pump, and quality construction. Tank, Sunl, Roketa, Vento, TNG, VIP, Baja, Jonway, JMstar, Peace, Lance, NST, as well as others. GY6 139QMB. This is usually a better unit than your stock one, so you may think about using this one instead. This carb comes with an accelerator pump which often eliminates hesitation whenver you pull the throttle open fast. Comes complete with electric choke, accelerator pump, and pre-tuned jetting for the most common settings. Unbeatable unit at an equally unbeatable price. $39.95

I have tried two different spark plugs also. Same issue. Battery is fully charged.

CDI Pics (it says fiyo on it)



Exhaust



I also need a few bolts as you can see above on my flywheel housing
SO a BBK kit and gears is the best?

I plan on painting it a blue color.

My question is, where do I get these jets from? scrappy dogs has a set
Mikuni Large round main jets
Large round main jets for JOG Minarelli 1PE40QMB 2stroke carburetors, along with dozens of other carbs that use this Mikuni style main jet. Available in a wide range of sizes larger than stock. These are a must for those of you that want to install an air filter, performance exhaust, and other upgrades. #75 through the big #100. $4.95
choose your size

Is this the size I need or where do i find out what type of jet?


EDIT

Btw I still havent located a number for my engine anywhere. I found a part where someone had filed something off the bottom of my tranny case.

I found this.

CPI scooters use 12mm wrist pins and 16mm crank shaft splines so they are your basic Two Stroke Jog 90 Engine as well as Keeway scooters are the same.

Im guessing it is a 1e40QMB

I can only find a #75 jet

Gotcha, I am thinking of buying a bore kit, jets, new carb, exhaust, intake, variator kit, rollers etc, but I saw this
"Holy smokes! 100cc big bore/long stroke JOG minarelli 2stroke scooter engine for your long case applications. 12" tire and larger. This actually has a carburetor included! (no airbox included)1pe52qmg is a 52mm bore. unprecedented quality, performance and price only at ScrappyDogs. $399.95 "

www.scrappydogscooters.com/50cc_2stroke_Performance.html

For that price i could get a 70cc bore kit for $106 + air intake $14-17 + carb for 60ish + rollers and jets for $50? + new cdi for $40 + better belt for $30 ='s around $303 but is 20cc less and has all the old parts, gaskets etc.