EMPI 122.5 Main Jet — for EMPI 40K / Kadron / Brosol / Solex Carburetors | Porsche 914 (1970–1976) (43-5122-7)
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EMPI 122.5 Main Jet — EMPI 40K / Kadron / Brosol / Solex Carburetors (Porsche 914 1970–1976, 43-5122-7)
Short answer: The EMPI 43-5122-7 is a genuine EMPI 122.5 precision-drilled brass main jet for EMPI 40K, Kadron, Brosol and Solex carburetors on the 1970–1976 Porsche 914. It meters fuel from cruise through wide-open throttle and is used to fine-tune the mixture. It is one fine step richer than a 120 and the next move when a plug read or wideband shows the main circuit a touch lean at wide-open throttle.
Part numbers: EMPI 43-5122-7 / 4351227 · 122.5 main jet
Vehicle Fitment
| Years | Vehicle | Notes |
|---|---|---|
| 1970–1976 | Porsche 914 | Running EMPI 40K, Kadron, Brosol or Solex carburetors |
Specifications
| Specification | Detail |
|---|---|
| Part number | 43-5122-7 |
| Manufacturer | EMPI |
| Jet size | 122.5 |
| Material | Precision-drilled brass |
| Fits | EMPI 40K, Kadron, Brosol, Solex |
| Boxed dimensions | 4 x 4 x 1 in |
| Shipping weight | 0.01 lb |
Why It Matters
The main jet is the carburetor's standing decision about how much fuel to pour from cruise to wide-open throttle; choose wrong and the engine either gasps lean or wallows rich. A lean main circuit shows up as a flat top end and pale plugs.
Installation Notes
- If you are unsure this fits your car, contact us with your year and model before ordering.
Frequently Asked Questions
- What does a 122.5 main jet do in a Solex or Kadron carburetor? A 122.5 brass main jet meters fuel through the carburetor from cruise to wide-open throttle.
- Will the EMPI 43-5122-7 fit my Porsche 914? It fits the Porsche 914, 1970–1976, with EMPI 40K, Kadron, Brosol, or Solex carburetors.
- When should I use a 122.5 main jet? It is one fine step richer than a 120 and the next move when a plug read or wideband shows the main circuit a touch lean at wide-open throttle. Jet size depends on your engine, venturi and altitude.
- Which carburetors does it fit? EMPI 40K, Kadron, Brosol and Solex carburetors that use this main jet style.
- What is the part number for the EMPI 122.5 main jet? EMPI 43-5122-7.
- How does it ship? Ships standard ground from our Orange, California shop.
Prop 65 Warning
This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
