CILOYU PZ27 Carburetor for 125cc–250cc Pit Bikes ATVs — 27mm Intake, Complete Kit

The CILOYU PZ27 is a 27 mm replacement carburetor kit engineered to restore smooth throttle response and efficient fuel delivery for 125cc–250cc four-stroke pit bikes, ATVs and go-karts.

If your small-displacement four-stroke engine is running lean, stumbling at idle, or lacking midrange power, the PZ27 offers a direct-fit upgrade designed to match a wide range of popular Chinese and Japanese-derived engines. Built from durable materials and supplied as a complete kit, this carburetor simplifies swap-outs and tuning for machines like TaoTao, Jetmoto, Baja and many Lifan/Zongshen-based units (not compatible with GY6 engines).

Which machines will the PZ27 fit and what engine sizes are supported?

The PZ27 is sized for intake diameters of 27 mm and works with many 125cc–250cc four-stroke single-cylinder engines. It’s commonly used on pit bikes, small dirt bikes, ATVs and go-karts that accept an inline-carb installation with 48 mm bolt spacing.

• Compatible brands: TaoTao, Viper, GIO, Zongshen, Lifan, Buyang, Kazuma, Coolsport, Sunl, Kymco, Jetmoto, Panterra.
• Typical models: Jetmoto 150cc ATVs, Baja DR150 bikes, TaoTao Rhino 250 ATVs, XR100/150L style dirt bikes.
• Engine fit: 125cc, 150cc, 200cc and 250cc four-stroke single-cylinder motors (not for GY6 engines).

How does this carburetor improve fuel economy and throttle feel?

The PZ27 is engineered to automatically move toward an optimal air‑fuel ratio across different throttle positions, helping engines run more consistently. That behavior reduces wasted fuel from overly rich mixtures and minimizes hesitation compared with worn OEM carbs.

• Automatic mixture stabilization across idle, cruise and wide‑open throttle ranges.
• Precision-machined bore for smoother airflow and better atomization.
• Lower fuel consumption by avoiding persistent overly rich conditions.

What hardware comes with the kit and what are the key measurements?

This listing is a complete PZ27 carburetor kit so you receive the parts needed to install and seal the unit, plus basic fasteners and tools. The intake throat measures 27 mm while the mounting bolt centers are 48 mm apart—verify these against your manifold before ordering.

• Included: PZ27 carburetor, intake pipe, gasket set, two fuel filters, red fuel line, two screws, two nuts, and a small wrench.
• Key size: intake diameter 27 mm; bolt hole spacing 48 mm.
• Installation-ready: includes seals and clamps to reduce additional purchases.

How do I handle installation and basic tuning after fitting the PZ27?

Installation is straightforward if you have basic mechanical experience: remove the old carburetor, match manifold spacing, connect fuel and throttle linkages, then fine-tune the idle and mixture screws. Always start with the factory-recommended pilot jet or a neutral baseline setting and adjust in small increments while monitoring engine response.

• Start engine warm, then set idle screw for stable idle RPM.
• Adjust air‑fuel mixture slowly, testing acceleration and throttle transition.
• Replace fuel filters included and double-check clamps for leaks.

Who is this for: The CILOYU PZ27 kit is for riders, mechanics and hobbyists who maintain 125cc–250cc four‑stroke pit bikes, dirt bikes, ATVs or small go‑karts and need a reliable replacement carburetor that improves throttle consistency and fuel efficiency. It’s ideal when the OEM carb is worn, clogged, or when upgrading to a properly sized aftermarket unit for better midrange performance.