MOPED ARMY

I know other people are running this setup.

down jet or lean out your idle mixture or you have more air at take off but still plenty of gas at WOT

timing is advanced all of the way. Plug chop shows I am running rich. I went to a smaller jet and it still four strokes at take off. but the midrange and topend are fine. Also I am at sea level.

leaky carb? fuel leak that is...if fuel is getting past the jet at partial throttle it would four stroke, and not be so noticeable at full throttle. just a shot in the dark.

Sounds like you are too rich. If you are rich at take off (i.e. low RPMs) then you are probably rich at the top also. Generally it is easier to feel the bike being rich at lower RPMs. Since you plug chop told you are rich, then you are rich and need to down jet.

i had this exact problem, its an electrical issue.. points are most likely arching... i wouldnt go riding too far or youll be pedaling home like i did last night.

Here is my setup

Puch Maxi

E-50

70cc airsal kit

70cc HC Head from Treatshq

Dell SHA 16.16

82 main jet

Proma GP

Kit and Pipe only have 120 miles on them. as well as head.

I had air leaks and i put new better gaskets on and it has helped some. There is a airleak in top of SHA because i broke one of the screws off in i and so i only have 1 side bolted down and the other ducktaped. It seems tight, but i kknow it's leaking , gotta be.

I was having a hell of a time getting it to idle. Someoen told me that if i didnt have jetting right, i wouldnt be able to idle in the first place. So after checking for leaks 3 times over and getting as many out as i possibly could, i upjetted and messed with idle mixture a tad bit as well as adjust throttle tension cable a bit, nwo i get a very idle , better than it was stock and doesnt engage clutch.

However I also notice i 4 stroke on take off if i give it too much gas. Just at teh very very beginning though if I WOT it. Once i hit low mid/ mid range i take off and once i hit 30, 30-45 is very very nice but then i top out with my 14x45 gearing. I think it's just the SHA carb sucking. It seems to have better take off when the engine is cold lol, then when it's hot. Well it doesnt seem like it does, it does actually. Heard of my friends 80cc dirt bike doin the same thing.

yea gil that is what it is doing.

btw ILIA,

bings jets do not have the same numbering system as dellortos.

example: 82 Bing Jet doesn't equal 82 jet in Dellorto.

21 will be a bit harder to tune and possibly overkill.

19 phbg IMO.