Upgrading your dirt bike exhaust pipe can improve throttle response, horsepower, and exhaust tone, while giving the bike a more aggressive look. The following selections cover engines from 50cc to 125cc and include complete exhaust systems and versatile slip-ons. Each option is suited for popular Chinese-brand pit bikes and standard dirt bikes, designed for straightforward installation and durable construction. This guide highlights five well-matched choices, with a quick summary table to help you compare fitment, features, and compatibility at a glance.
| Product | Brand | Fitment | Key Feature |
|---|---|---|---|
| YYCKE 28mm Exhaust Muffler Kit | YYCKE | 90cc–125cc Dirt Pit Bikes (CRF50, SSR, Baja, Coolster, etc.) | Complete 28mm kit with screws and gaskets |
| HAUERTZX 28mm Exhaust Muffler Kit | hauertzx | CRF50/70, XR50, 50cc–125cc Taotao DB10/DB14, Baja, Apollo, Coolster | Complete kit; durable welded construction |
| Universal 1.5-2″ Exhaust Muffler | Fast Pro | 38mm-51mm pipe diameter; Dirt, Street, ATV, Scooter | Versatile slip-on with hardware included |
| YC Yier 38mm Racing Exhaust System | YC Yier | 70cc–150cc minis (SSR, Apollo, RFZ, Taotao, etc.) | Full one-piece exhaust system |
| FVRITO Big Bore Exhaust System | FVRITO | XR50/CRF50 and 70cc–125cc Chinese bikes | Complete system with hardware |
YYCKE 28mm Exhaust Muffler Kit
Designed for 90cc–125cc dirt bikes, this 28mm YYCKE exhaust kit offers a bolt-on upgrade with a complete hardware set. It includes a 28mm head pipe, a muffler, a metal clip, a rubber gasket, two gaskets, and a screw kit, for straightforward installation. With a 45mm eye-to-eye, it fits popular models such as CRF50, SSR, Baja, Coolster, Piranha, and Taotao 125cc bikes. The durable metal construction and black finish give a sportier look while potentially improving exhaust flow and sound.
- Size: 28mm head, 45mm eye-to-eye
- Complete kit includes all listed hardware
- Fits 90cc–125cc dirt pit bikes
- Durable metal construction with a sleek finish
- Easy bolt-on installation similar to stock
HAUERTZX 28mm Exhaust Muffler Kit
HAUERTZX offers a 28mm head, 45mm eye-to-eye complete exhaust modification kit designed for CRF50, CRF70, XR50, and 50cc–125cc Taotao, Baja, Apollo, Rocketa, TTR, SDG, Coolster, SSR, and other mini bikes. The kit features high-quality metal material and precise welding for strong durability that resists heat and rust. It includes a full set of components for a bolt-on upgrade and comes in color combinations of Red, Silver, and Black to suit a variety of bike styles.
- Size: 28mm head, 45mm eye-to-eye
- High-durability metal with strong welds
- Complete kit—no extra parts needed
- Fits CRF50/70, XR50, Taotao DB10/DB14, Baja, and more
- Color options: Red, Silver, Black
Universal 1.5-2″ Exhaust Muffler
This universal 1.5-2 inch inlet hexagon exhaust muffler by Fast Pro is a versatile slip-on suitable for dirt bikes, street bikes, scooters, ATVs, and other bikes with pipe diameters of 38–51mm. It measures 390mm in length and includes the exhaust pipe with mounting hardware. Installation instructions are not included, so riders should have basic mounting or welding experience. It’s an economical choice for riders needing a flexible upgrade across multiple machines or experimenting with different exhaust tones and flow characteristics.
- Size: 390mm length; 38–51mm connection
- Universal fit for many bike types
- Includes exhaust pipe and hardware
- Installation instructions not included
- Slip-on design; not a full system
YC Yier 38mm Racing Exhaust System
YC Yier provides a 38mm head and 45mm eye-to-eye complete exhaust system, offering a one-piece design from head pipe to tail. The system is designed to improve engine breathing with various engine modifications and to deliver a deeper, bigger-bike tone. It’s sized for 25 inches of pipe length (635mm) and a 10-inch muffler (255mm), making it suitable for many 70cc–150cc dirt bikes such as SSR, Apollo RFZ, Taotao DB17, and more. The setup aims to balance better exhaust flow with a robust exhaust note while preserving compatibility with stock configurations.
- Fitment: 70cc–150cc bikes (SSR, Apollo, RFZ, Taotao, etc.)
- Complete one-piece system (head pipe to tail)
- Longer pipe length with a deep, throaty tone
- 38mm head, 45mm eye-to-eye
FVRITO Big Bore Exhaust System
FVRITO’s Big Bore exhaust system provides a complete one-piece head pipe-to-tail system with hardware for XR50/CRF50 and a broad range of Chinese pit bikes from 70cc to 125cc. This full kit is designed to deepen the engine’s breathing and deliver a more aggressive exhaust note. The 28mm head and 45mm eye-to-eye geometry support easy bolt-on installation and reliable performance under dirt riding conditions. The system features durable metal construction and a finish that resists heat and corrosion, making it a solid long-term upgrade for riders seeking a sportier sound and better flow.
- Fitment: XR50/CRF50 and 70cc–125cc bikes
- Includes head pipe, muffler, and mounting hardware
- Size: 28mm head, 45mm eye-to-eye
- Durable construction with heat- and corrosion-resistant finish
Buying Guide
When choosing a dirt bike exhaust pipe, consider the engine size, bike model, and your goals for performance, sound, and durability. Below are key factors to guide your decision and help you compare the options above.
Key Purchase Considerations
- Fitment and compatibility: Verify the exhaust diameter, head pipe size, eye-to-eye measurement, and the specific bike models listed by the seller. Some systems are designed for 50cc–125cc Chinese pit bikes, while others target larger minis up to 150cc.
- Complete system vs. slip-on: Complete systems replace the head pipe, muffler, and mounting hardware for a full upgrade, while slip-ons focus on the muffler end and may be easier to install but offer smaller performance gains.
- Material and durability: Look for metal with quality welding and corrosion resistance. Heat resistance is important to prevent warping or rust over time on dirt stays and exposed environments.
- Sound and performance goals: A deeper, sportier tone is common with these upgrades, but loudness varies. Consider how sound levels align with local noise regulations and trail rules.
- Installation effort and support: Some kits include all necessary hardware and gaskets, while others require additional parts or professional mounting. Availability of installation guides or manufacturer support can help with fitment.
- Brand reliability and warranty: Reputable brands provide clearer fitment specs and post-purchase support. Check warranty terms if available and weigh them against expected riding conditions.
- Maintenance and compatibility: Consider future compatibility with other performance modifications (air filters, carburetors, or engines) and how the exhaust may affect cooling or fuel efficiency.
How To Compare These Options
For riders seeking a direct bolt-on upgrade with a complete system, the YYCKE, HAUERTZX, YC Yier, and FVRITO Big Bore offerings provide comprehensive components with robust construction. The Universal 1.5-2″ exhaust from Fast Pro offers versatility across different bikes, serving as a flexible option when you ride multiple machines or test tonal preferences. If you want a deeper, more aggressive exhaust note while maintaining compatibility with a wide range of small-displacement bikes, prioritize complete systems with properly matched head pipes and mufflers. Always verify model-specific fitment before purchasing.