Finding the right air filter can boost idle stability, throttle response, and overall engine life for pit bikes. This guide highlights five proven pit bike air filters suited for common 49cc to 125cc engines, including several popular 35mm and 48mm sizes. Each option is evaluated on compatibility, build quality, filtration effectiveness, and ease of installation. Read on to compare top picks and choose the best filter to maximize airflow without compromising engine protection.
Summary Table of Chosen Products
| Product | Brand | Size/Compatibility | Key Benefit |
|---|---|---|---|
| HIAORS 35mm Motorcycle Red Air Filter | HIAORS | 35mm, fits many 49cc-125cc bikes | Wide compatibility, solid filtration, durable build |
| NIBBI Racing Motorcycle Air Filter (48mm) | nibbi | 48mm, for dirt bikes, quads, ATVs | High air intake, performance-focused design |
| HIAORS 38mm Bent Rubber Tube Air Filter | HIAORS | 38mm inner diameter | Compact fit, reliable sealing |
| Baitaihem Pack of 2 POD Air Filters | Baitaihem | 38/39/40/42/46/48/50/52/54mm options | Versatile sizing for multiple carbs |
| CIOM 35mm Air Filter | CIOM | 35mm inner diameter | Budget-friendly, compatible with common Chinese ATVs and go-karts |
HIAORS 35mm Motorcycle Red Air Filter
The HIAORS 35mm air filter is designed for a broad range of small-displacement bikes, including 49cc to 125cc engines. Its 35mm size targets common carburetor setups like PZ19/PZ20 variants and various Tao Tao and Coolster models. The filter features a metal and rubber housing that offers stable sealing and longevity under off-road use. This model emphasizes balanced filtration to reduce dirt intake while maintaining sufficient air supply for improved throttle response and horsepower potential.
Key specifications and considerations
- Compatibility: Fits numerous 35mm carburetor systems and multiple Chinese pit bike brands.
- Materials: Durable metal frame with a rubber seal for a tight fit.
- Performance impact: Aims to improve airflow while preserving filtration to protect the engine.
NIBBI Racing 48mm Air Filter
This universal 48mm air filter from nibbi is built for dirt bikes, pit bikes, scooters, and ATVs that use 48mm intake openings. It features a cone-style design with 360-degree air intake to maximize engine breathing. The internal diameter is around 48mm, so users should confirm carb sizing prior to purchase. The bike’s horsepower and torque can see a boost with improved air delivery, and the unit uses aluminum alloy and ABS for a rugged, reusable air filter surface that’s easy to clean and reinstall.
Key specifications and considerations
- Size: Approximately 48mm ID; verify carb size to ensure fitment.
- Material: Aluminum alloy and ABS for durability.
- Maintenance: Clamp-on, washable and reusable filter design.
HIAORS 38mm Bent Rubber Tube Air Filter
This filter uses a 38mm bent rubber tube design, compatible with 110cc and 125cc CRF, SSR, Sunl, Taotao, and related pit bike categories. The bent tube configuration can improve hose routing and seal reliability in tight engine bays. It’s intended to provide robust filtration with a straightforward install for riders who need a dependable, compact air intake solution. The product’s straightforward packaging helps simplify aftermarket maintenance on crowded builds.
Key specifications and considerations
- Size: 38mm inner diameter; fits certain CRF/SSR and Taotao variants.
- Application: Targeted toward 110cc-125cc pit bikes and similar platforms.
- Installation: Designed for simple mounting with reliable sealing.
Baitaihem Pack of 2 POD Air Filters
The Baitaihem 2-pack offers 38mm to 54mm pod air filters with ribbed internal mounts for secure carb connections. These filters are designed for various Chinese GY6 50cc and 90cc to 125cc dirt bikes, ATVs, and go-karts. The pods come in multiple inner diameters to accommodate several carburetor models, enabling users to swap between sizes without purchasing separate kits. The built-in ribbed mounting ensures a confident fit during vibrations typical of off-road riding.
Key specifications and considerations
- Sizes: 38mm, 39mm, 40mm, 42mm, 46mm, 48mm, 50mm, 52mm, 54mm options.
- Compatibility: Chinese-made ATVs, dirt bikes, pit bikes, and go-karts.
- Application: Ideal for riders who own multiple machines or carburetor variants.
CIOM 35mm Air Filter
The CIOM 35mm air filter is designed for common 50cc to 150cc ATV, dirt bike, pit bike, and go-kart models. It targets fitment for go-karts with PZ16, PZ19, and PZ20 carburetors and provides a compact solution for Chinese-made machines. Inside diameter is 35mm, with an overall height around 82mm. The filter’s compact profile suits smaller engine bays while offering reliable filtration for daily riding and light off-road use.
Key specifications and considerations
- Compatibility: 50cc-150cc Chinese ATVs and pit bikes with common carburetors.
- Dimensions: 35mm ID; 82mm height; outer diameter around 74mm.
- Value: Budget-friendly option suitable for standard replacements.
Buying Guide: Key Purchase Considerations
When selecting a pit bike air filter, consider compatibility with your carburetor, engine displacement, and riding conditions. Filter size must match the carburetor intake to avoid air leaks or restricted airflow. Reusable foam and pleated designs can offer longer lifespans and easier maintenance, but require regular cleaning and oiling for best performance. For racers or aggressive riders, higher airflow filters paired with proper sealing can yield noticeable gains in throttle response and mid-range torque, while still protecting the engine from grit and dust. Durability, ease of installation, and available replacement parts should factor into your decision.
- Carb size match: Verify the inner diameter (e.g., 35mm, 38mm, 48mm) to ensure a secure seal.
- Material quality: Look for metal housings and robust rubber seals for longevity and leak resistance.
- Maintenance needs: Reusable versus disposable designs affect long-term cost and effort.
- Riding environment: Dusty or sandy terrain benefits from higher filtration efficiency; wet environments require moisture resistance and quick-drying filters.
- Brand ecosystem: Some brands offer a broader range of compatible sizes and replacement parts, reducing the need for custom fittings.
Choosing the right air filter involves balancing compatibility, filtration quality, and ease of maintenance. The options listed here cover a range of sizes and styles commonly used in pit bikes and similar compact motorcycles, helping riders optimize airflow while maintaining engine protection.