EOPOAYI 1.1" Slip-On Motorcycle Muffler for 110–125cc Pit Bikes — Compact Durability, Noise Reduction

EOPOAYI 1.1 inch slip-on muffler: a durable, direct-fit replacement that lowers noise and restores backpressure for many 110cc–125cc pit bikes, mini bikes, ATVs and small engines.

This compact slip-on exhaust from EOPOAYI is built for small four-stroke engines used on pit bikes, mini bikes, ATVs, go-karts and utility machines. Constructed from treated metal to resist deformation and corrosion, it is designed to be an easy replacement for worn or noisy stock mufflers and to provide a deeper, controlled tone without the excessive volume of an open straight pipe.

Which bikes and engines will this muffler fit?

This muffler is engineered for broad compatibility with many Chinese 4-stroke pit bikes and small engine applications. It fits popular 110cc and 125cc models plus a range of 50cc–140cc machines and several small OHV clone engines.

• Common bike fits: CRF50, XR50, SSR 110/125, X-pro, Baja DR70/90, TTR 90/125, Apollo110/125, Taotao, Coolster models.
• ATV & go-kart: Taotao 50–125cc ATVs, Coolster 110/125, Icebear, Vitacci, Kazuma, Baja, NST, etc.
• Small engines: Compatible with many Predator, GX160/GX200, Harbor Freight and other clone OHV engines listed in the spec.
• Mini bike replacements: Fits Coleman CT200U, Massimo, Baja MB165/MB200 and other mini/mini-XRX series machines.

How does this muffler affect sound and performance?

The EOPOAYI slip-on is tuned to reduce peak volume while maintaining a low, pleasing exhaust note and preserving backpressure for consistent engine response. It delivers quieter operation than a straight pipe without significantly choking the engine.

• Produces a deeper, less intrusive sound than open exhausts.
• Reduces decibel output compared to straight pipes while keeping throttle response stable.
• Helps prevent excessive heat and blowback associated with damaged stock mufflers.
• No major power loss when properly matched to the listed engine types.

What are the build quality and materials like?

Made from durable metal and finished with corrosion-resistant treatment, this muffler resists dents and rust from typical off-road use. Its construction is meant to be rugged enough for trail, yard, and recreational applications.

• Rugged metal body resists deformation under normal use.
• Surface-treated finish to minimize rust and maintain appearance.
• Precision slip-on dimensions for reliable fitment and sealing.
• Simple internal packing and baffle design for sustained noise control.

How easy is installation and what should I check before buying?

Installation is straightforward for most slip-on replacements: slide the muffler onto the outlet, secure with the appropriate clamp or bolt, and check for leaks. Confirm outlet diameter and exhaust flange type on your bike or engine before ordering to ensure proper fit.

• Measure exhaust outlet to confirm the 1.1 inch slip-on diameter match.
• Inspect mounting points and any brackets that may be needed for your model.
• Use new clamps/gaskets if the old hardware is corroded for a tight seal.
• Test ride and recheck fasteners after initial run to avoid loosening.

Who is this for? Riders and owners of small-displacement pit bikes, mini bikes, ATVs, go-karts and utility engines who need a cost-effective, robust replacement muffler that tames noise without major performance trade-offs. It's particularly useful for people restoring older machines, replacing damaged stock mufflers, or seeking a reliable slip-on that fits many common Chinese 4-stroke platforms and small OHV clone engines.