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Weber IDF & IDA Air Jet, 77401
Weber IDF & IDA Air Jet, 77401


 
Aircooled.Net only carries ORIGINAL Weber JETS FROM ITALY, we do not carry Chinese reproductions which do not flow properly! These are all genuine Weber jets which have been flow tested at the factory. Our jetting guide down below will really help you dial in your carb!

Jets are sized in "milimeters", so a "200" jet is very close to 2.0mm. Actually they are rated on flow not size, after they are measured on a flow machine. That's why drilling and reaming jets is not necessarily a good idea, since drilling or reaming can result in a 180 air flowing more than a 190 air, based on orifice length and entry/exit radius, etc.

Price: $8.00
Item eligible for Econo/1st Class Mail shipment, min ship charge applies

: 77401

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This small item is eligible to ship via 1st class mail. Shipment via "First Class Mail" will occur automatically if you choose Priority Mail as your shipping metod during checkout AND if ALL of your items for shipment are of a qualifying size / shape / material.

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Overview
 
Aircooled.Net only carries ORIGINAL Weber JETS FROM ITALY, we do not carry Chinese reproductions which do not flow properly! These are all genuine Weber jets which have been flow tested at the factory. Our jetting guide down below will really help you dial in your carb!

Jets are sized in "milimeters", so a "200" jet is very close to 2.0mm. Actually they are rated on flow not size, after they are measured on a flow machine. That's why drilling and reaming jets is not necessarily a good idea, since drilling or reaming can result in a 180 air flowing more than a 190 air, based on orifice length and entry/exit radius, etc.

Item Features
We are aware that we are a little more expensive than other suppliers of Weber jets, but here is why you should use Aircooled.Net. First, we only sell genuine Weber jets from Italy! Secondly, we will tell you the correct jet sizes to minimize your jet expense, and your valuable time tuning! Other shops that aren't proficient at Weber Tuning will be happy to sell you jets at $4 ea, and you'll wind up with 6 sizes (24 jets) that you don't need! That makes no sense! By buying from us you will not spend more than you have to, our experience will keep your costs down, while providing the highest quality parts.

Normally guys use 175-180s on 40 IDFs with 28mm Venturis. If you jump up to 32s you will likely need 200-210 airs.

36mm venturis work best with 200-210s. I prefer larger airs with larger carbs, so 210-220 for 40mm and larger venturis. This will get you pretty close! Remember you can ALWAYS give us a shout for a more detailed and specific recommendation.

Also, NEVER EVER use F7 emulsion tubes on dual carbs! F7s are for centermounts, or if you have >750cc/cylinder. INCREASE Air Jet size "4" for every 1k' rise above sea level. So if you have dual 40 IDFs w/28mm venturis in Denver (5k') you'd need air jets around "20" bigger than at sea level, so 175 at sea level, or ~200 in Denver.


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