MOPED ARMY

Hmmmmm, I sprayed some carb cleaner between the card and intake and X-P it slow down and either dies or picks up.

Is a bad seal between inlet and carb causing all this misery ?

Either an air leak or your piston is upside down. What jet do you have in it? What kit? What pipe?

The cylinder has PW cast into it.

ok, to continue from the other thread- when you say you took the sharp edges off the intake, do you mean the sharp edges on the inside?

the rotary valve on a Vespa motor works when the inside of the case seals against the crank lobe, adjusting the hole inside the cases can be detrimental if care isn't taken to make sure it's done right, it doesn't take much to goof it. it sounds to me like you may have broken that seal, or at least adjusted the intake timing enough that your getting gas out the carb and it's affecting your running.

what air filter are you using? can you get a video of the gas coming out of the carb and post it up somewhere? (edited)

Thanks !!!

I’m very, very sure I didn’t brake or modify that seal. I just took off some casting flash and sharp edges deeper in.

I tried both of these (stock and aftermarket) to the same result

[attachment 209868 F250A11C-F01F-4A4C-B01C-E1B7B9D33B23.jpeg][attachment 209869 F865E25A-1761-4D1C-B44F-075CB5825896.jpeg]

It seems to have a tougher time idling without the air filter or with the high flow one.

Base gasket is the gasket between cylinder and case ? How does one check that for leaks ?

Conform to stock I left out the head to cylinder gasket.

I checked compression again and I’m about here

The rings are new, of course. (edited)

I never use a head gasket unless I absolutely have to, but I always make sure the head is flat by sanding on a piece of glass, and use copper spray for a good deal/heat transfer

Very cool that copper spray !

Doin' the same here. Very tidy job. If the head is an issue, I am definitely trying this as a solution

I am assuming this is the source of my issues? It probably can’t draw the mixture when I give it some beans. Also it is spitting back maybe? If that is a thing with faulty base gasket seals?

Someone said something about paper being a better seal than than those metal gaskets and I should cut my own ?

I guess the question is... could this be leading to all my woes ? (edited)

Will do. Thanks Terry. Let’s address this and see if things clear up a bit.

I ordered a thick gasket paper and some copper spray. Tuesday ?

The points, plug, coil and condenser are maybe a year or two old and have hardly seen any use. I am tempted to replace the coil and condenser anyway...

Ground that blue wire pair? I thought was supposed to be a power input for the brake circuit? I also thought that this particular motor was missing an extra power out for that brake light?

So this blue wire needs to be grounded ? That is a gremlin source ?

According to what I see here, and correct me if I am wrong... but that hanging blue wire outside the case should be connected to the back of the ignition low tension coil...

That green wire goes outside of the case to the red wire which handles the lights.

The Black/Gray goes to coil.

The internal red on seem to go from the point to the armature of the lighting coil.

SNAFU

The wiring diagram looks like it has a two wire condenser.... (edited)

I THINK I am reading correctly: that blue connector can simply ground to the case... but it is REQUIRED It grounds the entire circuit.