30mm Dellorto PHBH ballpark jetting setup


If you need a quick guide to help setup a Lambretta with a 30mm Dellorto PHBH, then here are a few known working setups, you use these as a guide only and at you own risk. These should help get you up and running, but our advice is you then book some dyno time to get your scooter setup just right - Please send your known working jetting for PHBH carbs so we can expand this area. Once you have jetted and fitted you new carb click here for some basic help setting the carb up.

cylinderexhaust30mm PHBH jetting used
rapido 225JL pipe Open 

AV264/X13 2nd/55 Pilot/118 Main/40 Slide

rapido 225 JL3 & Foam

 AV266/X13 2nd/52 Pilot/125 Main/40 Slide

rapido 225 JL3 Open 

AV266/X7 2nd/55 Pilot/125 Main/40 Slide 

monza 225  

JL3 OpenAV266/X2 2nd/53 Pilot/135 Main/45 Slide


 mugello 200

JL 4
AV264/X2 2nd/50 Pilot/115 Main/50 Slide

mugello 200

 Gori & Foam
AV266/X7 2nd/38 Pilot/112 Main/50 Slide

mugello 200

JL3 & Foam
AV264/X13 1st/53 Pilot/115 Main/45 Slide

AV264/X13 2nd/55 Pilot/125 Main/40 Slide

 imola 186 Scoot RS

  AV268/X 13 top/55 Pilot/125 Main/40 Slide

imola 186

JL3 Road OpenAV266/X7 2nd/55 Pilot/140 Main/50 Slide

imola 186

 JL3 Open AV264/X2 2nd/60 Pilot/128 Main/40 Slide 

imola 186

JL4 Snail Open 

AV264/X13 2nd/60 Pilot/130 Main/40 Slide

imola 186

AF RevCone 

AV264/X2 2nd/60 Pilot/130 main/40 Slide

mugello 186JL4 & Foam

AV264/X13 1st/55 Pilot/118 Main/40 Slide 


 For a full understanding of how these carbs work click here for the Dellorto Manual.


some other setups that may work

Lambretta with Dellorto 30mm PHBH jetting setups that you may find helpful,

Lambretta Imola 185 with Dellorto 30mm PHBH and Ancilotti 
Atomiser = AS264 / AS266/Needle X1 / X2/ main = 118/ Pilot/Idle = 53/slide = 40 


Lambretta Rapido 250 with Dellorto 30mm PHBH and 48mm RM exhaust, foam remote filter

Atomiser = AV264/Needle X13 2nd/Main = 122/120 / Pilot =55/ Choke =70 


Lambretta Rapido 250 With Dellorto 30mm PHBH and RM 48mm pipe, Breathe Sweet

Atomiser = AV266 / Needle 

Lambretta Imola 185 with Dellorto 30mm PHBH and Imola snail 
Atomiser AS266/Needle X2 /Main 135 +/Pilot 55 - 60/Slide 40 



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