Kacarber PZ19 19mm Carburetor Kit for 70–125cc ATVs and Dirt Bikes — 35mm Air Filter, Hand Choke

High-performance 19mm carburetor kit by Kacarber: a drop-in replacement for many 50–125cc horizontal-engine ATVs, dirt bikes and go-karts that includes a hand choke and 35mm air filter.

This Kacarber carburetor is designed to restore throttle response and reliable idling on small-displacement off-road machines. Built around a PZ19 (19mm) body with a manual choke, the kit fits a broad range of Chinese-made and aftermarket machines — including Kayo Fox 70, Bull 125, Predator 125 and similar 70cc–125cc models. Along with the carburetor, the package includes a 35mm foam-style air filter to help protect the intake and improve longevity in dusty conditions.

Will this carburetor fit my ATV, dirt bike, or go-kart?

The Kacarber PZ19 is intended for horizontal single-cylinder engines commonly found on 50cc–125cc machines. It replaces many stock 19mm carburetors and works with both 4-stroke and common horizontal-engine setups from popular Chinese manufacturers.

• Compatible models: Kayo Fox 70, Bull 125, Predator 125 and similar 70–125cc units.
• Engine sizes: recommended for 50cc, 70cc, 90cc, 110cc and 125cc horizontal engines.
• Carb type: PZ19 (19mm) with cable-operated hand choke.
• Includes a 35mm air filter sized for the intake boot on many small engines.

How does installation and tuning typically go?

Installation generally involves removing the old carburetor, mounting the Kacarber unit to the intake boot, connecting the throttle cable and choke, and securing the fuel line. Basic jetting and idle adjustments are done via the main jet and pilot screw; you may need minor tuning for altitude or aftermarket exhausts.

• Mounting: standard clamp-on inlet for most rubber intake boots.
• Connections: throttle cable, fuel hose, and choke lever are supplied/compatible.
• Tuning: adjust pilot screw and main jet as needed for smooth idle and mid-range response.
• Tools: basic hand tools and a flat/Phillips screwdriver suffice for most installs.

What performance and maintenance benefits can I expect?

Swapping a worn or clogged carburetor for this Kacarber unit can restore crisp throttle feel, steadier idling and more predictable mid-range power. The included 35mm filter helps keep dirt out of the throat, which reduces wear and makes routine maintenance easier.

• Improved throttle response and more consistent idling on older machines.
• Reduced intake contamination thanks to the supplied foam-style air filter.
• Hand choke simplifies cold starts and warm-up cycles on carbureted engines.
• Simple rebuildability: accessible float bowl and jets for cleaning or replacement.

Are replacement parts or upgrades available for this carburetor?

The PZ19 family is widely supported with replacement jets, gaskets and aftermarket air filters. Common upgrades include different jet sizes for fine-tuning and higher-flow filters for performance-oriented builds.

• Replaceable jets and pilot screws for tuning to local fuel and altitude.
• Gasket kits and float bowl components available from many small-engine suppliers.
• Aftermarket high-flow or washable filters can be fitted in place of the supplied 35mm unit.
• Throttle and choke cables from OEM or aftermarket sources are compatible.

Who is this for: Riders, mechanics and DIY enthusiasts who need a reliable, affordable replacement carburetor for small-displacement ATVs, dirt bikes or go-karts. Ideal for restoring performance on older or neglected machines, performing quick repairs trackside, or upgrading a tired stock carburetor. Not intended for complex fuel-injection conversions or oversized engines beyond the recommended 125cc range.