Polini 1300-1139 pilot jet kit for compatible PWK, OKO and Keihin carburetors, showing five brass jets in a foam holder Polini 1300-1139 pilot jet kit for compatible PWK, OKO and Keihin carburetors, showing five brass jets in a foam holder
Polini 1300-1139 pilot jet kit for compatible PWK, OKO and Keihin carburetors, showing five brass jets in a foam holder

Polini

Polini 42-52 Pilot Jet Kit - PWK, OKO & Keihin Carburetors

SKU 1300-1139
$35.00
Shipping calculated at checkout.
Description

This Polini pilot jet kit is a five-size tuning set for compatible PWK, OKO, and Keihin carburetors, giving you options to dial in idle and low-throttle fueling. The threaded brass jets come organized in a foam holder, so you can keep track of each size as you test your setup.

This product is intended for off-road use only. This product is not intended for use on public roads or land.

Key Features

  • Five tuning sizes: Includes 42, 44, 46, 49, and 52 pilot jets.
  • Low-throttle adjustment: Provides pilot-circuit options for tuning idle and initial throttle response.
  • Brass construction: Threaded jets with slotted ends for installation and removal.
  • Organized storage: Foam holder keeps the five jets together between tuning changes.
  • Carburetor-based fitment: Intended for compatible PWK, OKO, and Keihin carburetors using the matching pilot-jet pattern.

Technical Specifications

  • Brand: Polini
  • Part number: 1300-1139
  • Manufacturer part number: 343.0302
  • Part type: Pilot/slow jet tuning kit
  • Quantity: 5 jets
  • Jet sizes: 42, 44, 46, 49, 52
  • Material: Brass
  • Storage: Foam holder

Compatibility

  • Compatible PWK, OKO, and Keihin carburetors that accept this pilot-jet pattern
  • Match the original jet's thread, overall length, and body profile before ordering; carburetor brand alone does not establish fitment
  • Select the final jet size for your engine, intake, exhaust, and operating conditions; the included sizes are tuning options, not a guaranteed setting for every setup

Jetting takes careful testing. Read our Carburetor Jetting 101 guide for more information.
Product Diagrams
Features
  • Five pilot jet sizes: 42, 44, 46, 49, 52
  • Idle and low-throttle pilot-circuit tuning
  • Threaded brass jets with slotted ends
  • Foam storage holder included
  • For compatible PWK, OKO and Keihin pilot-jet patterns
Specifications

Brand: Polini; Part number: 1300-1139; Manufacturer part number: 343.0302; Type: pilot/slow jet kit; Quantity: 5 jets; Sizes: 42, 44, 46, 49, 52; Material: brass; Storage: foam holder; Application: compatible PWK, OKO and Keihin carburetors; Use: off-road only
Model Fitments

Universal carburetor-based application: compatible PWK, OKO and Keihin carburetors using the matching pilot-jet pattern; confirm thread, overall length and body profile against the original jet; vehicle make/model alone does not establish fitment
  • Same day shipping for orders placed before 2PM (CST) M-F
  • 30-day return period on eligible items
  • Flat-rate shipping for orders shipped to the 48 Contiguous United States.
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