Keyster Carburetor Fuel Adjustment Kit FH-5263NR – Honda VFR400R NC30 Rear Carb Tune Kit

Keyster Carburetor Fuel Adjustment Kit – FH-5263NR
Honda VFR400R NC30 (Rear Bank)

A complete carburetor tuning kit from Keyster, designed for precise fuel adjustment, troubleshooting, and performance setup.

Supplied with a wide range of jets and components, this kit allows accurate control of the air-fuel ratio across low, mid, and high RPM ranges.

Ideal for restoring performance, diagnosing fueling issues, or fine-tuning modified engines.

🔧 Fitment

• Honda VFR400R (NC30)
• Rear bank carburetor

📦 Product Details

• Brand: Keyster
• Product Code: FH-5263NR
• Type: Carburetor fuel adjustment / tuning kit
• Quantity: 1 set (for 1 carburetor / 1 cylinder)

🔩 Kit Includes

• Needle valve (AA super needle)
• Idle screw (air screw)
• Float chamber gasket
• Pilot jets (3 sizes)
• Main jets (6 sizes)
• Jet needles (4 sizes)
• Additional tuning components

⚙️ Key Features

• Wide range of jet sizes for precise carb tuning
• Designed for accurate air-fuel ratio adjustment
• Ideal for troubleshooting fuel delivery issues
• Suitable for modified engines (intake/exhaust changes)
• Includes Keyster “AA Needle” for improved sealing and performance

🛠️ Use Cases

• Carburetor repair and fault diagnosis
• Restoring correct fuel delivery
• Performance tuning after modifications
• Adjusting fueling across RPM ranges

⚠️ Notes

• Price is for one carburetor kit (single cylinder)
• Contents may vary – refer to product images
• Manufacturer specifications may change without notice
• Instructions (if included) may be in Japanese