210 polini alloy cold start issue

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Davidsquaredson
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Joined: Sun Jun 10, 2012 11:41 am
Main scooter: Early Eibar Jet 200
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Tue Jun 04, 2019 3:05 am

I've got a new bmg26/26 carb.and fast flow tap. Jetting is dialed in very nicely. When cold, I pull the choke out and kick. After about 5 kicks I can start to smell gas, but I have not touched the throttle. Only way to start it is crack open throttle wide and kick it like it's flooded. It will start throwing a bunch of gas out the exhaust.

I've tried pulling the choke out different amounts, doesn't make a difference.

Once hot, the bike starts first kick.

Ideas?

Tx
David

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carpe scooter diem

1974 Rally 200
1965 Li150
1963 TV175
1974 Eibar Jet200

Jack221
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Main scooter: PX221
Location: London
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Tue Jun 04, 2019 11:43 am

Float needle leaking. New or not doesn't matter.
Vespa est ieiunas, quia semper operaturi

mick1
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ebay user ID: saxonleaf
Main scooter: Li Avanti 225
Location: York
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Tue Jun 04, 2019 11:59 am

I'd be looking at the choke. Is it working correctly, correct size ?

eibargum
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Main scooter: Vespa PX210 Polini
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Tue Jun 04, 2019 4:37 pm

Check theres no swarf in that carb, I,v read a few complaining about it.

Davidsquaredson
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Posts: 178
Joined: Sun Jun 10, 2012 11:41 am
Main scooter: Early Eibar Jet 200
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Sun Jun 09, 2019 3:41 pm

eibargum wrote:Check theres no swarf in that carb, I,v read a few complaining about it.
Sorry, what is swarf?

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carpe scooter diem

1974 Rally 200
1965 Li150
1963 TV175
1974 Eibar Jet200

mick1
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Posts: 1544
Joined: Sun Dec 04, 2011 7:43 pm
ebay user ID: saxonleaf
Main scooter: Li Avanti 225
Location: York
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Sun Jun 09, 2019 4:05 pm

Cut and pasted after a Google search (took about 10 seconds):

Swarf - Wikipedia
https://en.wikipedia.org/wiki/Swarf
Swarf, also known as chips or by other process-specific names (such as turnings, filings, or shavings), are pieces of metal, wood, or plastic that are the debris or waste resulting from machining, woodworking, or similar subtractive (material-removing) manufacturing processes.

Goggle is a search engine that helps you get information..... ;)

paul d
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Main scooter: T5 172 Tv 240
Location: Galway Ireland
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Mon Jun 10, 2019 12:45 am

I agree with Jack221. Had the same problem and a new red tipped needle sorted it.

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sean brady scooters
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Location: Ripon, North Yorkshire
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Mon Jun 10, 2019 12:43 pm

sounds to me that the pilot jet may be blocked ,and as its the smallest jet it is usually the first to get blocked ..make sure it is clean and then also check the air screw adjustment !
Sean Brady Scooters - 01765 690 698

Davidsquaredson
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Posts: 178
Joined: Sun Jun 10, 2012 11:41 am
Main scooter: Early Eibar Jet 200
Contact:

Tue Jun 11, 2019 3:35 pm

Jets were clear but there was what looked like very fine hairs under the filter, and there was a few particles on the needle that was probably preventing needle to seat closed.

And to start it only needs a small amount of choke compared to stock.

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------------------------------------------------------------------------------
carpe scooter diem

1974 Rally 200
1965 Li150
1963 TV175
1974 Eibar Jet200

Davidsquaredson
registered user
Posts: 178
Joined: Sun Jun 10, 2012 11:41 am
Main scooter: Early Eibar Jet 200
Contact:

Thu Jun 20, 2019 12:37 pm

Cleaned carb and jets. Choke jet is a 60. Issue still there. I swapped out the carb with a 24/24, standard jets, 128 main. Same cold start issue but otherwise ran fine.

The choke lever works as it should.

I'm going to double check the timing (should be 19). It's got a new bgm stator, spark is strong.

I will also order choke jets, the range 60-75.

I can't think of anything else.

David

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------------------------------------------------------------------------------
carpe scooter diem

1974 Rally 200
1965 Li150
1963 TV175
1974 Eibar Jet200

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