New guy on old Vespa

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Vvanderv
registered user
Posts: 4
Joined: Fri Mar 26, 2021 1:39 pm
Main scooter: Vespa over 1972
Contact:

Hi group!

Just got into this forum and there’s so much information! Got a 1971 Vespa primavera 125 USA version on the bench and would need some advice on jetting or maybe I’ve got wrong carburetor!
Vvanderv
registered user
Posts: 4
Joined: Fri Mar 26, 2021 1:39 pm
Main scooter: Vespa over 1972
Contact:

I have installed those parts and removed material on crankcase intake opening as specified and matched the port hole on head
Crankshaft SERIE PRO
by Worb5

Racing Air Filter POLINI SHB

Intake Manifold POLINI reed valv for SHB

Racing Exhaust POLINI "Banana"


Racing Cylinder POLINI Mono
130 cc


Carburettor DELL'ORTO SHBC
19.19

Clutch ferodo sport

Ignition PINASCO "FLYTECH" 19mm

What jets should I be using!?
gaz_powell
registered user
Posts: 1208
Joined: Sat Mar 28, 2009 1:10 pm
Location: hartlepool
Contact:

In my opinion I would move away from that carb and go for a polini cp23 or similar dellorto
Vvanderv
registered user
Posts: 4
Joined: Fri Mar 26, 2021 1:39 pm
Main scooter: Vespa over 1972
Contact:

Tanks gas_powell!

Can you tell me more and why this one?
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drunkmunkey6969
Moderator
Posts: 2838
Joined: Sun Jan 04, 2009 1:42 pm
Main scooter: '69 Lambretta GP
Location: North Yorkshire
Contact:

Hi Bud, welcome aboard. Feel free to re-post the question in the relevant tech section for more responses :)
See our YouTube scooter channel for Tech-help: https://www.youtube.com/c/TheScooterFactory/videos
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