Poor starting moped

[Farmingstock]

I have a 4T Piaggio Zip 50cc that will eventually start but takes forever.

Changed the plug (spark is fine)
Checked the valves (.10 and .15)
Changed the choke to manual
Charged battery fully
Changed the fuel
Checked the fuel pump (fine to the carb)
Cleaned the carb

The bike will start eventually and starts fine once it’s started but once left overnight or for long periods it takes forever to start and you get the feeling it isn’t going to start.

Any suggestions?

[A100man]

compression check?
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Now: A100, GT250A, XJ598, FZ750

Then: Fizz, RS200, KL250, XJ550, Laverda Alpina, XJ600, FZS600

[Farmingstock]

[sickpup]

[Farmingstock]

Had another look today and can’t test the compression without taking the engine out, there is bearly enough room to get a socket on the end of the plug!

[that_impulse_guy]

it does sound like you need to investigate "changed the choke to manual" a bit more.

there is nothing that changes the starting procedure between hot and cold, besides the choke. Going over what you said, power is fine, hot starting is fine..restarting is fine.

so check out choke a bit. If you changed it to manual was it because you had good information that the automatic choke wasnt working? etc etc...go over that part of your thinking and redo if you find error in the logic. You perhaps have more info now, than when you did this specific mod that may contradict an earlier finding.

as a far flung "hey but what if it isnt the choke coz Ive checked it 100 times" then assuming all else what you said is true there is nothing else to check.
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Gone: Yamaha DT50lc, Suzuki DR500, Suzuki A100, Kawasaki z250ltd, RD350YPVS, Suzuki DR Big, Kawasaki AR125, Kawasaki KMX200, Suzuki GS1000S, Katana 1100, GS550M, Suzuki RGV250
Now: Suzuki GSX400X, Suzuki RF900R, NS400R

[Ayrton]

Sounds daft but have you checked the air filter? I spent ages trying to figure out why my scooter wouldn't start and a new filter fixed it The old one just became too blocked up even though it didn't look too bad.