MothAr PWK 24mm Universal Carburetor for 50–125cc Scooters ATVs — Chromed Semi‑Flat Slide, Power Jet

The MothAr Universal PWK 24mm carburetor is a bolt-on replacement designed to improve throttle response and tuning flexibility for 50cc–125cc scooters, ATVs, dirt bikes and mini motorcycles.

Built as a universal aftermarket unit, this PWK 24mm carburetor fits a wide range of small-displacement engines and offers adjustable fueling with a chromed semi-flat (D) throttle slide and a power jet. It’s intended for riders who want more precise throttle control, easier tuning, and compatibility across many makes and models. The body accepts a 35mm intake manifold connection and a 50mm air filter, making it suitable for common conversions and performance upgrades.

Which bikes and engines can I install this PWK 24mm on?

This carburetor is made to suit many small-displacement machines, from 50cc mini bikes to 125cc lightweight street and off-road machines. It works with single-cylinder 2- and 4-stroke engines commonly found on scooters, quads, pit bikes and older motocross models.

• Compatible engines: 50cc, 80cc, 90cc, 100cc, 110cc, 125cc
• Fits brands: Honda, Yamaha, Kawasaki, Suzuki and many Chinese-made ATV/mini bike manufacturers
• Model examples: YZ80/85/100/125, KTM 65/85, NSR50/80/125, KX80/100/125, CR80/85/125
• Works with scooter/GY6 platforms and common dirt-bike intake setups

How does the PWK 24mm change performance and tuning?

The PWK 24mm offers a semi-flat (D) throttle valve and an integrated power jet to broaden usable rpm range and refine throttle progression. That combination gives riders more predictable midrange pull and clearer feedback for jetting adjustments.

• Chromed semi-flat slide for smoother throttle action and reduced wear
• Power jet improves high-rpm fuel delivery when needed
• Adjustable main and pilot jet compatibility for exact tuning
• Simple bolt-on replacement that supports progressive tuning upgrades

What are the physical connections and installation notes I should know?

The MothAr PWK 24mm uses common outer diameters to match aftermarket intake manifolds and air filters, but verify fitment before purchase. Intake manifold side outer diameter measures 35mm while the air filter side is 50mm, so adapters or custom boots may be required on some machines.

• Intake manifold side outer diameter: 35mm — check your manifold bore
• Air filter side outer diameter: 50mm — compatible with many pod filters
• Universal mounting orientation works on left or right carb locations with appropriate linkage
• Minor modifications or adapter boots sometimes needed for exact fit

How should I jet and set up the carburetor for best results?

Proper jetting depends on engine displacement, exhaust, intake, elevation and typical riding style. Start with conservative jets, then fine-tune the pilot and main jets while monitoring plug color and throttle response. Use the adjustable air/fuel mixture and power jet settings to dial in midrange and top-end behavior.

• Begin with factory-equivalent jets for your engine size
• Adjust pilot jet for idle and low-throttle response first
• Use plug reading and brief wide-open tests to refine main jet
• Power jet tuning improves high-rpm richness if needed

Who this is for: Riders, mechanics and hobbyists who need an affordable, versatile carburetor that supports tuning and performance upgrades on small-displacement machines. If you own a scooter, ATV, pit bike, mini moto or older dirt bike and want more controllable throttle response or a straightforward replacement for a worn stock carb, the MothAr PWK 24mm is a practical option. Confirm manifold and filter diameters before ordering, and expect to perform basic jetting for optimal results.