Vespa PX 221 help

Anything related to Vespas... ask tech questions, post helpful info, or just read and learn.
smiffy1968
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Joined: Thu Mar 31, 2011 11:58 am
Main scooter: Nevermind Mk1 T5
Location: Ipswich
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1.3mm at the moment. It'll probably hang up in the shed for now. The spacer.
Norrie Bodge
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Main scooter: GP-1971-Ts230/S2-1960-Ts230
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Nik221 wrote:And what's your squish band? Today I put my phbh 28 carb on and I have to say what a bloody difference!! I can't explain the difference!! :)

Squish is at 1,5mm m8
Nik221
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Main scooter: Vespa PX221...
Location: Serbia, Nis
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Thanks, my squish is very big then I need to sort that out.
smiffy1968
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Main scooter: Nevermind Mk1 T5
Location: Ipswich
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What is your squish Nik?
Nik221
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Main scooter: Vespa PX221...
Location: Serbia, Nis
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I used a 2mm thick solder wire and it didn't touch it so it is more than 2 and that is probably bad.
Nik221
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Joined: Thu Nov 27, 2014 2:13 am
Main scooter: Vespa PX221...
Location: Serbia, Nis
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I am in need for some jetting help with my phbh 28. What shall I start from?
smiffy1968
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Posts: 100
Joined: Thu Mar 31, 2011 11:58 am
Main scooter: Nevermind Mk1 T5
Location: Ipswich
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Have a look on here Nik. Carb set ups for Vespa and Lambreta. Good info.
Ginch
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Nik221
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Posts: 56
Joined: Thu Nov 27, 2014 2:13 am
Main scooter: Vespa PX221...
Location: Serbia, Nis
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Today I went for a ride and my mate was in his car going behind me and he said that we were going 135 km/h and when I took the plug off it was a bit on the white side. Main jet is 115 idle55 x40 needle bottom notch don't know the atomizer is though.
smiffy1968
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Posts: 100
Joined: Thu Mar 31, 2011 11:58 am
Main scooter: Nevermind Mk1 T5
Location: Ipswich
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Hi Nik, good speed and good news[youtube] :D . I've upjetted mine to 135 main, still clean through rev range and fast! Going higher on main. You think you have main jet on your Delly right now?
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