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SKU:
NLT1I00275
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40-Piece PWK Keihin OKO Carburetor Main and Pilot Jet Kit
$22.99
In Stock
$22.99
Sale price
$22.99
Regular price
This new 40-piece carburetor jet kit includes 30 main jets and 10 slow/pilot jets for compatible PWK, Keihin-style, OKO, KOSO, CVK, and related carburetors.
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
- PWK and OKO carburetors using matching main and pilot jet dimensions
- Selected Keihin-style CVK, PE, PJ, PWM, FCR, and KOSO applications only where threads and length match
- Custom dirt bike, ATV, scooter, and go-kart carburetor tuning
Product Overview
A carbureted engine that bogs at wide throttle, hesitates off idle, or needs adjustment for altitude, intake, exhaust, or weather may require jetting—not a random turn of the mixture screw. This assortment gives a tuner multiple main and pilot sizes for controlled changes.
Jet number, thread, head diameter, and length must match the carburetor. Aftermarket carb markings are not always identical to genuine Keihin flow sizes. Change one circuit at a time, read the engine response, and avoid lean operation.
Key Features & Performance
- 30 main jets and 10 pilot/slow jets
- Broad size range for staged carburetor tuning
- Fits matching PWK / Keihin-style thread formats
- Useful for motorcycles, ATVs, scooters, and small-engine projects
Common Uses
- Correcting an off-idle stumble with pilot-jet testing
- Tuning main fuel delivery after intake or exhaust changes
- Compensating for major altitude or temperature changes
Technical Specifications
- Product Type: Carburetor main and pilot jet assortment
- Quantity: 40 pieces
- Main Jets: 30
- Pilot / Slow Jets: 10
- Fitment: Dimension and thread match required
Installation & Fitment
- Record the current jet sizes and baseline settings
- Compare thread pitch, head, and length
- Change one variable at a time
- Check plug color, temperature, and air-fuel behavior safely
- Stop immediately if the engine shows lean surge, detonation, or overheating
Compatibility Notice
Northline Parts does its best to list all known compatible models. The correct part may fit an application that is not shown above. Model year, production date, serial number, engine or equipment specification, installed options, and previous repairs can change fitment. Match the original part, reference number, dimensions, connectors, mounting points, and product photos before purchase.
Frequently Asked Questions
Q: Will these fit every Keihin carb? A: No. Keihin uses several jet families; compare physical dimensions and thread.
Q: Does a larger number always mean richer? A: Usually within the same genuine jet family, but aftermarket numbering and flow can differ.
Q: Which jet controls idle? A: The pilot/slow circuit has the biggest effect near idle, while the main jet matters more at larger throttle openings.
Q: Is this an original-equipment part? A: No. This is a new aftermarket product. Brand names and part numbers are used only to identify compatible applications.
Part Summary
keywords: PWK carburetor jet kit, 30 main 10 pilot jets, Keihin OKO slow jet set, dirt bike carb tuning jets, 40 piece CVK jet assortment
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, specifications, and application before purchase.