IT7 carb jets - where can I get some?

B

benracin

New member
Is there a place to buy a variety of jets for that stock (nikki sp?) carb we have on the 12A? I'd like to mess with the mix a little and I'm not sure where I can find different jets. Thanks!

Ben.
LOL ITA 33
 
Webber DGV jets fit the Nikki Carb. The numbering on the Nikki jets is consistent with Webber jet numbers (eg a 160 jet has an orifice of 1.60 mm). I've bought them from "Overseas Distributing" 1-800-665-5031. Yaw Power also sells jets.
It's been several years, so I don't have current prices.

Tak
 
I may be grabbing for a little to much info, but what jet sizes are you folks using? I know that engines differ, I'm just looking for a base point.

Thanks!
 
I may be way off (I was jsut searching for jetting info myself). I'm running 42/ 72 (I think, I know the larger is a 72)
I just richened it up after my exhaust adventures, nad have only run it about 10 minutes, when one of the neeedle valves started sticking..
(Pro7 car, stock exhaust, etc. etc.)
Marcus
 
Stock 79 Carbs came with 92 primary and 160 secondary jets. A thoroughly cleaned and Mazda rebuild kitted 79 carb responded well to 97 primary and 165-170 secondary (webber DGV jets). The 79 carb (or at least my 79 carb) suffered from a flat spot in the power curve 6300 to 6800 RPM. Depending on weather and fuel(which changes seasonally here in CA) I could run as rich as 110 primary and 170 secondary, but a slight change in weather would cause the motor to completley fall on its face over-rich.
I have since purchased a professionally built carb (81-85 style) that works better and doesn't suffer from the power dip. That carb came with custom jets and uses a different numbering scheme that doesn't correspond to the Mazda or Webber numbers...
Realistically, the jets are peanuts compared to the Dyno time. Buy a variety and go play.
Practice changing jets before you go to the Dyno so you have ALL the tools necessary to change them without spilling fuel on a hot exhaust...

Good luck,
Tak
 
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