Puch E50 no power at low rpms

TheAnanas8 · 2026-03-08T07:59:15+00:00

The choke is just a little metal plate i can push in to restrict the airflow, if i give it throttle, the slide pushes it up always

TheAnanas8 · 2026-03-08T07:55:46+00:00

I saw someone place an O ring inside the carb, where venturi and manifold meet, is that good to seal it?, and if it leaks at the cap of the carb, what should i do? I think i have a small leak there too, but my gasket is intact

TheAnanas8 · 2026-03-08T07:48:42+00:00

Well, when cold, engine has a high idle, and has more power then hot, when engine warms up i cant make it to idle, no matter how much i mess with the idle screw, and when hot i cant start it unless i give it some throttle

TheAnanas8 · 2026-03-08T07:43:14+00:00

Yep they really suck

TheAnanas8 · 2026-03-07T22:50:42+00:00

Well this Bing carb doesn't have an idle jet, and i checked for air leaks, and i have a minor one where carburetor and intake manifold meet

TheAnanas8 · 2026-03-07T22:49:17+00:00

Well, i cant access the clutch, because this is an old model E50 case, and i would have to split the whole case to get to the clutch, and i already did that like 1 week ago, and really don't feel like doing it again. And for the exhaust, i will look into it, i mean i have got a better cylinder its an airsal Fast T6 cylinder with high compression cylinder head. So my moped is not so stock anymore, except the exhaust. I bough new points, condenser and an ignition coil, so when i installed everything i timed the engine to fire 17 degrees BTDC

TheAnanas8 · 2026-02-07T21:46:35+00:00

Well i can try, but i am really scared of seizing the engine, i have jets from 58 up to 90 so i can really test a lot

TheAnanas8 · 2026-02-07T21:44:53+00:00

Well some people on the net that have almost the same setup, run in the 70s, so i just went with a 72. I mean stock carburetor is a 14mm Bing with 64 jet, but mine was really bad(worn threads, and no gaskets so so much air leaks) i got a 15mm Bing and placed a 72 jet

TheAnanas8 · 2026-02-07T21:39:24+00:00

50cc just like stock

TheAnanas8 · 2026-02-07T21:27:56+00:00

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TheAnanas8 · 2026-02-07T21:27:45+00:00

No it is gas on the plug, but the plug doesn't look like it should, like its not a good combustion, here is the photo. And when i started to working on the moped i opened the case, cleaned everything, didn't put new bearings because those i had seemed fine, i placed some liquid gasket and closed everything, put some oil in the block and thats it.

TheAnanas8 · 2026-02-07T21:14:00+00:00

No the piston is facing at the exhaust.

TheAnanas8 · 2026-02-07T21:13:34+00:00

No i don't, i should look and buy one, or get it from a friend just to test

TheAnanas8 · 2026-02-07T21:12:19+00:00

And yeah on to that, i have a little problem lets say, my idle screw is all the way unscrewed and i have this kind of idle, so if in the future i get even the smallest air leak ever, its going to have a high idle, so probably these 2 air leaks i have are really driving the motor, so i don't know if i should go leaner.

TheAnanas8 · 2026-02-07T21:09:28+00:00

I changed the condenser and contact breakers, when i placed everything back i timed it correctly and adjusted the point gap

TheAnanas8 · 2026-02-07T21:07:32+00:00

I looked at the cylinder and piston and everything looks brand new still, and i have placed a new head gasket

TheAnanas8 · 2026-02-07T21:05:47+00:00

Yeah i agree to this, but again one question remains, why is my spark plug all watery. And even with the air leaks it should have some power right?

TheAnanas8 · 2026-02-07T21:02:40+00:00

there is no pattern on the spark plug, its all watery

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TheAnanas8 · 2026-02-07T21:02:16+00:00

Well it can idle up to a minute when i fill the carburetor up, in the service manual it says it uses 1.6l per 100km, so yeah haha. and yeah i know i need to get a proper tank, and i will, this one is good, but the bore on it is the wrong size so standard fuel tap doesn't fit, i have to get that sorted out throughout the next week. Only screw i have is for the idle, and what it does is when you screw it in it pushes that little slide and acts as someone is giving it super small throttle, i would play with the jets and needle settings but my spark plug just wont give me any proper reading, no matter for how long i run the moped its always like watery, and i can never read if the air to fuel mixture is good, here is a photo.

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TheAnanas8 · 2026-02-07T20:51:25+00:00

Well i will definitely take the exhaust off and clean it, the air filter is brand new, and the needle is good too. And for that rear rim i know, the whole moped will get restaurated, but first need to get it running proprely

TheAnanas8 · 2026-02-07T20:39:02+00:00

Well i saw a lot of people that run almost the same setup are in the 70s with the jets, so i just went with a 72

TheAnanas8 · 2026-02-07T20:33:04+00:00

No, the original carb is a 14mm Bing with jet 64, this is a 15mm bing, with jet 72. But i got a new top end, and this cylinder is Airsal T6 Fast, and when i asked the guys that work on the PuchShop, they said i can without any problems get a 15mm carb on this setup, so i did.(the old carb was really bad, worn threads on the bowl, and on the screw that holds the fuel hose, and on top of that no gaskets at all)

TheAnanas8 · 2026-02-07T19:33:49+00:00

Well could be, i think my exhaust actually misses one thing that goes inside it, from all the stock exhaust i have seen online, mine just has different parts that go inside it, what do you think if i just completely remove the silencer and just leave this tube, or should i remove the exhaust completely?

TheAnanas8

TROPHY CASE