MOPED ARMY

You have probably checked these, but it may be worth confirming or revisiting:

Are you sure the exhaust pipe is clear? I routed out mine to increase flow.

The original air box is limiting. I replaced mine with a cone shaped filter and it helped.

Are you premixing gas 50:1? I would always premix and not use the oil pump. The pump is not always dependable, and adds more oil than needed (forgot the ratio it produces) causing it to be less rich.

Are you sure you are mixing gas-oil correct? I was refilling the little 2-stroke containers from a quart and later realized I was using too much oil. That will clog things and slow it down.

What's a plug chop exactly? I will post pics of the spark plug. I have no idea what jets are in the carb, it's supposed to have normal factory ones in it. I put the original ones in it from the original carb. Running it on choke kills the motor or if driving slows it down at least.

Everything is stock. No mods have been done. I should take it for a spin today amd take a video and post for everyone to see how it's running. It's somewhat torn apart because I've been changing parts all week on it. I will take a video and post it today.

looks right.

How do I find that out?

Okay so I dont see anything stamped on them.

I already have the manuals in person and have read them cover to cover many times. I have done everything in them and nothing fixes this thing. Did you see the video I posted? Why when it reaches max speed of 17 mph does it have like a farting sound? And only go 17 mph?

Then you better work hard on your comprehension skills because you obviously don't know what a is main jet is or where it is located in the carb .

Neither of what you have in that bag are main jets .

That is not the original foam element. Looks to be aftermarket or homemade. Any variance in density or thickness will have a dramatic effect on how the motor runs in otherwise stock configuration. Also there is closed cell and open cell foam. You need the later.

I removed the air filter completely it didnt make a difference.

That sound you keep refrencing is called four-stroking. Its doing that up top becuase it is too rich on the main jet. Get the main right an it will run clean in the higher rpms and youll be going faster. Read up on simple carb tuning and rejet accordingly.

The problem with swapping og parts to the chinese clone is that the two units are not going to be manufactured to the same specs and its basically a craps shoot whether any swapped parts will actually work. Youre much better off finding an original carb.

And stop saying you've done "everything" because you obviously haven't.

Clean the original carb and reinstall!!! No Chinese junk! The original carb is jetted for that engine.

On to your video. When you open it up u can hear the carburetor you shouldn't hear it like that. Replace original foam filter. Check for air leaks? Carburetor gasket, reed valve gasket, base gasket, case gasket, and exhaust. I remember my 1st fa drove me nuts doing the same thing! This is what mine was check all your vacuum lines. I had little cracks in mine just enough to be way lean. Your engine is lean not rich!

If they opened up the jet it would run better with out the air filter but since its running the same I'm betting there's an air leak somewhere!