RedCap PZ22 22mm Carburetor for 110–125cc Pit Bikes and ATVs — 38mm Filter Spigot, Cable Choke

The RedCap PZ22 is a 22mm replacement carburetor with a cable choke and 38mm filter spigot designed to fit many 110–125cc Chinese-style pit bikes and quads as a direct upgrade from smaller PZ19 units.

This high-flow carburetor provides tunable air-fuel adjustment and an accessible float bowl to simplify maintenance, making it a common swap for SSR, Apollo, Taotao, Roketa and other 110cc–125cc small-engine machines. Before ordering, confirm mounting dimensions and the location of the idle screw to ensure compatibility — models and production runs can vary.

Will the PZ22 fit my pit bike or ATV?

Compatibility depends on your engine’s mounting pattern, intake spigot size, and choke cable arrangement. The RedCap PZ22 mounts with a spigot and has a 48mm bolt-to-bolt side hole distance and a 38mm filter spigot, with the idle screw located on the left.

• Carburetor bore: 22mm
• Filter spigot diameter: 38mm
• Side bolt center-to-center: 48mm
• Idle adjustment: left-side location

How does this carburetor improve performance or reliability?

The larger 22mm bore increases airflow compared with PZ19 units, which can support stronger throttle response and better top-end potential when matched with appropriate jetting. The adjustable air/fuel mixture and accessible bowl make tuning and routine servicing easier, helping maintain consistent running conditions.

• Larger 22mm throat for greater airflow over PZ19
• Air/fuel mixture screw for fine tuning
• Accessible float bowl for quicker cleaning and inspection
• Cable-operated choke for reliable cold starts

What should I check before installing the PZ22?

Measure the intake spigot, bolt hole spacing, and confirm the choke type on your bike. Also compare the fuel inlet location, throttle cable geometry, and whether your airbox or filter will mate to the 38mm spigot to avoid fitment surprises.

• Compare spigot diameter and flange shape to your intake manifold
• Verify 48mm hole center-to-center for mounting bolts
• Ensure throttle and choke cable brackets align with your controls
• Confirm air filter or airbox fits the 38mm spigot

How do I tune and maintain this replacement carburetor?

Start with factory jetting for your engine size, then adjust the air/fuel screw and pilot jet for smooth idle and throttle response. Regularly inspect the float bowl, needle valve, and filter spigot for debris; periodic cleaning prevents clogging and poor running.

• Set air/fuel screw to baseline then fine-tune on the road
• Clean float bowl and jets during routine service intervals
• Replace or clean the air filter to protect jets and passages
• Check choke cable for smooth operation and correct routing

Who this is for: The RedCap PZ22 is aimed at riders and small-engine mechanics who need a robust, tunable replacement carburetor for 110–125cc Chinese-style pit bikes, dirt bikes and ATVs. It’s suitable if you’re upgrading from a PZ19 for improved airflow, rebuilding a machine with a worn carb, or swapping a damaged unit; double-check fitment measurements and mounting orientation before purchase to ensure a straightforward installation.