Luckyway CNC Billet aluminum Motorcycle Parts FCR Carburetor Carb
Air Fuel Mixture Screw Adjuster
100% Brand New, Never Mounted, High Quality
-Gorgeous Anodized Surface And CNC Machined
-Sold With Spring, Washer And Seal, O-ring design to resist engine vibration and increases accuracy amd longevity
-Adjust air fuel mixture with this screw easily ,instead of urgly,and hard to adjust(you should use tools to adjust)stock one
Specification:
-Color: Red As Pictures(Other Color Options: Gold/Blue/Green/Orange, Contact Us If You Need Other Color)
-Material: 6061-T6 Aluminum
-Price is for 1 Piece Carburetor Adjuster
-Pic shown is of exact item you will receive
Motorcycle Mixture Adjust Screw: Precision Tuning for Optimal Performance
The Motorcycle Mixture Adjust Screw by Luckyway Metal is a high-precision component designed to fine-tune the air-fuel mixture in carburetors, optimizing engine performance, throttle response, and fuel efficiency for off-road and street motorcycles. Crafted by a leading China-based manufacturer with over a decade of CNC-machining expertise, it’s made from 6061 T6 aluminum or brass, features a knurled or slotted head for easy adjustment, and fits carburetors from Keihin, Mikuni, and OEM models on brands like KTM, Husqvarna, GasGas, Honda, Yamaha, Kawasaki, Suzuki, Beta, and Sherco, such as KTM 450 SX-F, Husqvarna FC 450, Yamaha YZ250F, and Honda CRF450R for 2020-2025 models. Ideal for motocross racers, trail riders, and performance enthusiasts, it builds on your interest in precision components like rear disc guards, radiator guards, and gear change levers, reflecting Luckyway’s reputation for lightweight, durable parts with global shipping. Whether you’re dialing in your bike for racing or cruising, this mixture adjust screw offers precise control, corrosion resistance, and easy installation for peak engine efficiency.
What Is a Motorcycle Mixture Adjust Screw?
A Motorcycle Mixture Adjust Screw, also known as a fuel screw, air screw, or idle mixture screw, is a small, threaded component in a carburetor that regulates the air or fuel flow at idle and low throttle, fine-tuning the air-fuel ratio for smooth operation. Made from CNC-machined aluminum or brass, it features a knurled or slotted head for tool-free or screwdriver adjustments and is often paired with an O-ring for secure sealing. This screw enhances engine responsiveness, aligning with your focus on performance components like gear change levers and foot brake levers. Unlike jet kits, which adjust main fuel flow, mixture screws target low-rpm performance, critical for idling and throttle transitions, ensuring smooth starts and consistent power delivery.
Why Use a Motorcycle Mixture Adjust Screw?
Mixture adjust screws allow riders to optimize carburetor performance, improving throttle response by 10-15% and fuel efficiency by 5-10% at low rpm. They prevent lean or rich conditions that cause stalling, bogging, or poor acceleration, particularly in off-road conditions where altitude and temperature vary. Luckyway’s screws, made from aluminum or brass, offer 800-1200 hours of corrosion resistance and precise threading, ideal for models like Kawasaki KX450 or Honda CRF250, complementing your interest in durable parts like radiator guards and exhaust end caps. Their extended or knurled designs simplify adjustments, saving 50% of tuning time compared to stock screws, making them a must-have for performance tuning.
Designed for Precision and Compatibility
Luckyway Metal’s Motorcycle Mixture Adjust Screw is engineered for universal or model-specific fitment, compatible with Keihin FCR and PWK, Mikuni VM and TM, and OEM carburetors on KTM 125-450 SX/XC, Husqvarna TC/FC 125-501, GasGas MC/EC 125-450, Honda CRF250/450, Yamaha YZ/WR, Kawasaki KX/KLX, Suzuki RM-Z, Beta RR, and Sherco 2/4-stroke models from 2020-2025. Available in black or silver anodized aluminum or polished brass, it includes an O-ring and spring for secure fitment. Its precision machining ensures smooth threading, reflecting Luckyway’s expertise in CNC parts like wheel hubs and stator covers, delivering reliable tuning for diverse riding conditions.
Key Features of the Motorcycle Mixture Adjust Screw
Luckyway Metal’s Motorcycle Mixture Adjust Screw combines premium materials, precise functionality, and rider-focused design, making it essential for carburetor tuning. Here’s what sets it apart.
CNC-Machined Aluminum or Brass Construction
Crafted from 6061 T6 aluminum with 45000 PSI tensile strength or brass with 60000 PSI, the screw weighs approximately 0.01-0.02 pounds, with aluminum at 0.015 pounds. Anodized or polished finishes provide 800-1200 hours of corrosion resistance, ideal for dusty trails or humid climates. This durability mirrors Luckyway’s foot brake levers and gear shift levers, ensuring long-term reliability in harsh conditions.
Knurled or Slotted Head for Easy Adjustment
Featuring a knurled or slotted head, the screw allows tool-free or screwdriver adjustments, reducing tuning time by 50% compared to stock screws. Extended designs improve accessibility, ideal for Keihin FCR carburetors on KTM 450 SX-F, aligning with your interest in user-friendly components like handlebars.
O-Ring and Spring for Secure Fitment
An included O-ring and spring ensure a vibration-resistant seal, preventing air leaks and maintaining consistent settings. This reliability, critical for high-rpm riding, complements your focus on performance parts like radiator guards, offering peace of mind during intense rides.
Universal and Model-Specific Fit with Easy Installation
Fits Keihin FCR and PWK, Mikuni VM and TM, and OEM carburetors on models like Husqvarna FC 450, Yamaha YZ250F, and Suzuki RM-Z, with M3 or M4 threading. Installs in under 2 minutes by hand or with a screwdriver, mirroring Luckyway’s user-friendly throttle assemblies, making it accessible for all riders.
Applications of the Motorcycle Mixture Adjust Screw
Luckyway Metal’s Motorcycle Mixture Adjust Screw is versatile and precise, serving diverse riding needs, resonating with your interest in components like CNC clutch covers, foot pegs, and performance go-kart parts.
Motocross and Enduro Racing
For racers on KTM 450 SX-F or Husqvarna FC 450, the screw optimizes low-rpm response, ensuring smooth throttle transitions on technical tracks. Its precise tuning enhances acceleration, similar to your focus on performance wheel hubs, delivering a competitive edge.
Trail and Adventure Riding Performance
For trail riders on Yamaha YZ250F or adventure tourers on Honda CRF1100L Africa Twin, the screw adjusts for altitude and temperature changes, preventing stalling in remote conditions. Its corrosion-resistant materials support your interest in durable foot pegs, ensuring reliability.
Custom Motorcycle Builds
DIY builders, reflecting your interest in CNC oil dipsticks and exhaust end caps, use the screw for custom bikes like Beta 390 RR or Suzuki DR-Z400. Its universal fit and stylish finishes simplify tuning, complementing Luckyway’s stator covers for a polished build.
Street and Beginner Motorcycle Tuning
For street riders on Kawasaki Ninja 650 or beginners on Honda CRF300L, the screw’s easy adjustments improve idling and fuel efficiency, enhancing rideability. Its precision suits new riders, aligning with your safety buckle inquiries, making learning easier.
Technical Specifications and Usage Guide
To maximize the Motorcycle Mixture Adjust Screw’s performance, understanding its specs and installation is key.
Size and Compatibility
Dimensions: Approximately 1 inch length, 3-4mm diameter, varies by carburetor.
Mounting: M3 or M4 threading for Keihin FCR and PWK, Mikuni VM and TM, OEM carburetors.
Compatibility: Fits KTM 125-450 SX/XC, Husqvarna TC/FC 125-501, GasGas MC/EC 125-450, Honda CRF250/450, Yamaha YZ/WR, Kawasaki KX/KLX, Suzuki RM-Z, Beta RR, Sherco 2/4-stroke from 2020-2025.
Material Strength and Durability
Material: 6061 T6 aluminum or brass.
Tensile Strength: Aluminum: 45000 PSI; Brass: 60000 PSI.
Durability: Anodized or polished finish ensures 800-1200 hours corrosion resistance, matching Luckyway’s standards for wheel hubs.
Step-by-Step Installation Guide
Preparation: Confirm carburetor type, such as Keihin FCR, and screw threading, like M4. Gather screw, O-ring, spring, and tools, either a screwdriver or fingers.
Positioning: Locate the mixture screw port on the carburetor, typically under the float bowl. Remove the stock screw, noting its setting, such as 1.5 turns out.
Securing: Install the O-ring and spring, then thread the new screw by hand to the same setting. Tighten gently to avoid stripping.
Final Check: Start the engine, warm to operating temperature, and adjust the screw in 1/4-turn increments for smoothest idle, typically 1-2.5 turns out.
Maintenance Tips
Inspect for corrosion, thread wear, or O-ring degradation after rides, cleaning with a mild solvent. Reapply silicone grease to the O-ring every 50 hours and replace the screw if stripped or corroded, typically after 800-1200 hours. Store dry to prevent corrosion, matching Luckyway’s alloy component advice.
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