SeaEagles 50cc Accelerator Pump Conversion Kit for Holley 4150 — 20-11 CNC parts, improves throttle response

If your classic motorcycle, scooter, or small-engine project uses a Holley 4150-style carburetor and feels flat when you twist the throttle, this conversion kit delivers a targeted shot of fuel during acceleration to sharpen response. The kit is engineered for simple retrofit and long service life, supplying precision parts that sit directly on the carb body to produce a measured 50cc pulse of fuel when the throttle is opened quickly.

How does this kit change throttle response?

The conversion kit introduces a timed fuel pulse when the throttle opens, which helps reduce hesitation and smooth the transition from idle to part-throttle. Instead of waiting for the main circuits to compensate, the accelerator pump briefly supplements fuel to keep the mixture stable.

• Delivers a 50cc burst tailored for small-displacement engines.
• Reduces stumble or bogging during rapid throttle movements.
• Works with the existing fuel circuits without major jetting changes.

What components are included and how difficult is installation?

The kit arrives as a plug-and-play package with the pump body, linkage hardware, seals, and mounting fittings needed for most Holley 4150-style applications. Installation is straightforward for anyone familiar with basic carburetor service; you’ll remove the air cleaner, access the throttle linkage, and bolt the pump assembly to the designated mounting points.

• Complete hardware set for immediate fitment on compatible carburetors.
• Precision-machined parts that align with factory port locations.
• No specialized tools required beyond common hand tools.

Will this fit my engine and what adjustments are required?

This 20-11 conversion is designed for 50cc-class engines and Holley 4150-style carburetors commonly used on small motorcycles, scooters, and custom builds. After installation you may need to fine-tune throttle linkage length and check mixture settings, but dramatic carburetor re-jets are not usually necessary for typical street setups.

• Specifically built to match Holley 4150 bolt and port layouts.
• Minor throttle linkage and float adjustments may be required.
• Recommended to verify air/fuel balance after installation during a short test ride.

How durable and serviceable are the parts?

Parts are CNC-machined and made from corrosion-resistant materials to withstand vibration and regular use found on two-wheel applications. Seals and O-rings are serviceable so you can replace wear items without swapping the entire unit, extending useful life and simplifying maintenance.

• Precision-machined pump body for consistent operation.
• Replaceable seals keep maintenance costs low.
• Robust hardware resists loosening under road vibration.

Who is this for: The SEAEAGLES 20-11 kit is aimed at vintage motorcycle and scooter owners, custom builders, and small-engine enthusiasts who want crisper throttle response without a full carburetor overhaul. It’s ideal for riders who prefer mechanical upgrades that are reversible and serviceable, and for home mechanics comfortable with basic carburetor work who want a noticeable improvement in transient fueling.