Best Exhaust For Motorized Bicycle: Flexible and Chamber Pipes

#1 · Best Overall

1. FVRITO Viper Flexible Exhaust

• Compatible with Vehicle Type: Bike,Scooter
• Weight: 0.98 kg
• Material: Stainless Steel

Best for: For flexible routing across engines.

Why it ranks #1: Its flexible stainless-steel pipe and bendable silencer suit awkward engine positions, while stated fitment spans 49cc–100cc two-stroke motorized bicycles.

A flexible stainless-steel expansion pipe and bendable silencer let the FVRITO Viper mount at different angles to suit engine position. Its listed compatibility reaches 49cc through 100cc 2-stroke motors, making it a flexible-route option across motorized bicycles, pocket bikes, scooters, and pit dirt bikes.

The stainless-steel section is described as flexible, and the silencer can bend, so the assembly can be arranged at different angles depending on engine position. That adaptability matters when a fixed exhaust path does not match the mounting layout. Its stated range includes 49cc, 50cc, 60cc, 66cc, 80cc, and 100cc 2-stroke engines. FVRITO lists bike and scooter compatibility, with an inlet connection size of 1.57 inches and an outlet connection size of 40 millimeters.

Skip it if you need a stated overall length before choosing; FVRITO's chrome expansion-chamber pipe is listed at 470 mm.

Pick the Viper if your 2-stroke bicycle or small engine needs an exhaust that can be angled around its position. Its listed range is broad, but buyers who need a stated overall length will find no length specification here.

Listed on Amazon as: FVRITO Viper Flexible Exhaust Muffler Pipe Silencer with Hardware for 2 Stroke 49cc 60cc 66cc 80cc 100cc Engine Gas Motorized Bicycle Motor Bike Parts Silver

#2 · Flexible Installation

2. MBGYL Flexible Exhaust

• Compatible with Vehicle Type: Scooter

Best for: For angled engine layouts.

Why it ranks #2: The listing covers 49cc–100cc two-stroke engines and describes a bendable silencer, flexible pipe, and reinforced flange welding.

A flexible stainless-steel expansion pipe paired with a bendable silencer lets this MBGYL exhaust take different installation angles. Its listed fitment covers 2-stroke 49cc through 100cc engines, making it an option for riders whose motor and mounting position call for a more adaptable pipe than a fixed shape provides.

The flexible pipe body and bendable silencer support multi-angle installation, which can help accommodate differing engine positions without relying on a single pipe angle. Reinforced flange welding is specified alongside the flexible construction as an anti-deformation feature. Fitment spans 49cc, 60cc, 66cc, 80cc, and 100cc 2-stroke engines, including motorized bicycles, pocket bikes, scooters, and pit dirt bikes. The package includes the muffler pipe plus a mounting gasket and nut kit for installation.

Skip it if you have a four-stroke engine; the listing limits this muffler to 2-stroke applications.

Choose this MBGYL pipe if your 2-stroke motorized bicycle needs a flexible exhaust route and falls within the stated 49cc–100cc range. Its adjustable shape suits varied mounting angles, but it is not listed for four-stroke engines.

Listed on Amazon as: Flexible 2-Stroke Exhaust Muffler Silencer for 49cc-100cc Motorized Bike

#3 · Longest Listed Pipe

3. hauertzx Stainless Flexible Exhaust

• Compatible with Vehicle Type: Scooter
• Weight: 16 oz

Best for: For long flexible exhaust routing.

Why it ranks #3: Its flexible stainless-steel pipe fits listed 49cc–100cc engines and has a stated 945mm total length with 40mm mounting-hole spacing.

A 945 mm flexible stainless-steel pipe gives this hauertzx muffler an unusually long listed exhaust length for routing around an engine position. Its 40 mm mounting-hole distance and compatibility with 49cc through 100cc 2-stroke engines add practical fit checks for motorized bicycles and other small vehicles.

The 945 mm overall length and flexible construction support varied exhaust angles, according to the listing, so buyers can assess both routing reach and adjustability against their layout. Stainless steel is specified, and the flange is described as stronger with its weld. A 40 mm mounting-hole distance provides a separate mount measurement. Compatibility includes 49cc, 60cc, 66cc, 80cc, and 100cc 2-stroke engines across bicycles, gas motor bikes, pocket bikes, and scooters.

Skip it if you need a shorter 470 mm pipe; FVRITO's chrome expansion-chamber kit lists that total length.

This hauertzx pipe suits riders needing flexible routing and the reach of a 945 mm exhaust for a listed 2-stroke engine. Check available space and the 40 mm mounting distance, since its length may not suit compact layouts.

Listed on Amazon as: Stainless Steel Flexible Exhaust Muffler Pipe Silencer Gasket for 2 Stroke 49cc 60cc 66cc 80cc 100cc Engine Gas Motorized Bicycle Motor Bike (Silver)

#4 · Hardware Bundle

4. FVRITO Expansion Chamber

• Compatible with Vehicle Type: Bike
• Weight: 1.08 kg
• Material: silver

Best for: For measured 40 mm mounts.

Why it ranks #4: This 470mm expansion-chamber pipe covers listed 48cc–100cc engines and includes a gasket, nut kits, and a spark plug.

A stated 40 mm mounting-hole distance gives this FVRITO expansion-chamber kit a concrete fit check for compatible 2-stroke motorized bicycles. The 470 mm overall length and included gasket, nut kit, and spark plug make it a more fully bundled replacement than a pipe-only listing.

The 40 mm mounting-hole spacing lets buyers compare the listed mount dimension with their setup before installation, while the 470 mm total length provides a second size reference for planning clearance. Compatibility includes 48cc, 49cc, 50cc, 60cc, 66cc, 80cc, YD100, BT100, and Zeda80 2-stroke engines. The package includes the exhaust pipe, gasket, nut kits, and spark plug, so several installation-related items arrive together. The listing describes it as easy to install.

Skip it if you need a listed 100cc fit; FVRITO's Viper flexible exhaust covers 100cc engines.

This FVRITO kit suits buyers with a compatible 2-stroke engine who value stated dimensions and included installation parts. Check the 40 mm mounting spacing and 470 mm length against your bicycle, and note that 100cc fitment is not listed.

Listed on Amazon as: FVRITO Performance Chrome Exhaust Muffler Expansion Chamber Pipe Silencer Gasket for 2 Stroke 50cc 66cc 80cc 100cc Engine Gas Motorized Bicycle Motor Bike Silver

#5 · Tensioner Included

5. YOXUFA Exhaust Chamber Kit

• Compatible with Vehicle Type: Motorcycle
• Weight: 1.26 kg
• Material: Metal

Best for: For exhaust and chain-tensioner kits.

Why it ranks #5: The 470mm chamber kit fits listed 49cc–100cc engines, specifies 40mm mounting-hole spacing, and includes a chain tensioner assembly.

An included chain tensioner assembly sets the YOXUFA exhaust kit apart from pipe-only replacements. It lists compatibility with 49cc, 50cc, 66cc, 80cc, and 100cc 2-stroke motorized bikes, plus a 40 mm mounting-hole distance and 470 mm total pipe length.

The exhaust pipe and chain tensioner assembly arrive together, which lets buyers source two listed motorized-bike components in one kit. A 40 mm mounting-hole distance and 470 mm total length provide dimensions for checking mounting and available routing space. The listing says the exhaust helps reduce noise and improve riding comfort, and its additional description says it allows smoother exhaust flow. Fitment includes YD100 and PK80 engines alongside the stated 2-stroke sizes.

Skip it if you prioritize a quieter listed exhaust; SUNQIAO's 40 mm motorized-bicycle pipe does not carry this listing's loudness note.

This YOXUFA kit suits a 2-stroke motorized-bike owner who needs an exhaust and chain tensioner together and can use its stated dimensions. Consider the listing's little-loud sound note before choosing it for noise-sensitive riding.

Listed on Amazon as: YOXUFA Motorized Bike Exhaust Pipe Muffler Expansion Chamber Kit Compatible with 80cc 100cc 49cc 50cc 2-Stroke Motor Engine Bicycle Parts Gasket Chain Tensioner Adjuster Silver

#6

6. HXGXKBQ Expansion Chamber

• Compatible with Vehicle Type: Motorcycle

Best for: For flexible two-piece mounting.

Why it ranks #6: Its two-piece, spring-held design is described as able to flex rather than pull at exhaust studs, with stated fitment for 49cc–80cc engines.

A spring-tensioned, two-piece exhaust lets this HXGXKBQ assembly flex and move rather than acting as a single rigid pipe. The listing connects that movement with reduced risk of tearing away exhaust studs, while its stated fitment covers 49cc, 60cc, and 80cc 2-stroke motorized bicycles.

The two-piece construction is held together by spring tension and can flex when needed, a feature the listing says can help avoid tearing exhaust studs or stressing motor mounts. Its muffler tip is also described as reducing exhaust noise while releasing exhaust gas safely and effectively. Fitment is stated for 49cc, 60cc, and 80cc 2-stroke engines. The package includes an exhaust and gasket, giving buyers the principal listed replacement components for the described application.

Skip it if you run a 100cc 2-stroke engine; FVRITO's Viper flexible exhaust lists compatibility through 100cc.

Consider this HXGXKBQ exhaust if your 49cc, 60cc, or 80cc motorized bicycle benefits from a movable two-piece connection. Its flexibility addresses mount and stud stress, but the stated engine range does not cover 100cc.

Listed on Amazon as: Performance Exhaust Muffler Expansion Chamber Pipe Silencer Gasket

#7

7. sthus Chrome Muffler

• Compatible with Vehicle Type: Bike
• Material: Stainless Steel

Best for: For stainless-steel pipe replacements.

Why it ranks #7: This stainless-steel replacement is listed for 49cc–80cc two-stroke bikes and specifies 40mm screw spacing for checking fit.

Stainless-steel construction distinguishes this sthus 40 mm exhaust pipe for owners seeking a straightforward replacement for a compatible 2-stroke bicycle. The listing specifies a 40 mm screw distance and fitment for 49cc, 50cc, 60cc, 66cc, and 80cc motorized-bike engines.

The 40 mm screw-distance measurement gives buyers a concrete mounting point to compare with their existing setup, while the listed engine sizes narrow the intended application to common small 2-stroke motorized-bicycle engines. Stainless steel is the specified material. The package contains one muffler exhaust pipe, and the listing describes installation as easy. It does not list a gasket or other hardware in the package, so buyers should account for the single-pipe contents when organizing a replacement.

Skip it if you want an included gasket; sthus's Half Moon silencer package includes one.

This sthus pipe fits buyers seeking a stainless-steel replacement with a stated 40 mm screw distance for a listed 49cc–80cc 2-stroke bike. Plan around the pipe-only package if your installation also needs a gasket.

Listed on Amazon as: 40mm Chrome Silver Muffler Exhaust Pipe For 49cc 50cc 60cc 66cc 80cc Motorized Bicycle

#8

8. SUNQIAO Bicycle Muffler

• Compatible with Vehicle Type: Motorized
• Weight: 1.7 lb
• Material: Alloy Steel

Best for: For simple 40 mm replacement checks.

Why it ranks #8: The alloy-steel muffler fits listed 49cc–100cc motorized bicycles and specifies 40mm screw distance, though its listing gives less design detail.

A 40 mm screw distance gives this SUNQIAO exhaust a direct mounting measurement for buyers replacing a motorized-bicycle muffler. The alloy-steel pipe is listed for 49cc through 100cc motorized bicycles, and the package includes five exhaust gaskets alongside the pipe.

The 40 mm screw-distance specification offers a clear dimension to compare with the existing mount, while the included five gaskets provide several sealing pieces with the replacement pipe. SUNQIAO lists fitment for 49cc, 50cc, 60cc, 66cc, 80cc, and 100cc motorized bicycles. The exhaust is alloy steel and black, and the product description calls installation easy. Since the package contents specify one pipe and five gaskets, buyers can identify the supplied pieces before planning the replacement.

Skip it if you need a stated pipe length to plan clearance; FVRITO's chrome expansion-chamber pipe lists a 470 mm total length.

This SUNQIAO pipe is a practical candidate for a motorized-bicycle owner matching a 40 mm mount and listed 2-stroke engine size. Its included gaskets are useful, but the listing gives no overall length for clearance planning.

Listed on Amazon as: Motorized Bicycle Exhaust, Bicycle Muffler Silence for 49cc 50cc 60cc 66cc 80cc 100cc Motorized Bicycle (Black)

#9

9. sthus Half Moon Silencer

• Material: Aluminum

Best for: For lightweight half-moon replacements.

Why it ranks #9: Its 40mm hole distance and included gasket suit listed 49cc–80cc two-stroke engines, but the stated fitment range is narrower.

At a listed 460 g, this sthus Half Moon silencer offers a lightweight aluminum exhaust option for 49cc, 60cc, 66cc, and 80cc 2-stroke motorized bicycles. Its 40 mm hole distance and included gasket give buyers two useful installation details to check before replacing a muffler.

The 40 mm hole distance provides a mounting measurement for comparing the silencer with an existing exhaust position, while the included gasket supplies a listed sealing component with the pipe. Its aluminum material and 460 g weight distinguish it from heavier, unspecified alternatives without implying a performance gain. Fitment covers 49cc, 60cc, 66cc, and 80cc 2-stroke motorized bicycles. The package lists one exhaust and one gasket, so buyers can see what arrives for the replacement.

Skip it if you need a listed 50cc fit; FLYPIG's chrome muffler lists compatibility with 50cc engines.

Choose this Half Moon silencer if your motorized bicycle uses one of its stated 49cc, 60cc, 66cc, or 80cc 2-stroke engines and a 40 mm mount. Its light aluminum build and included gasket suit straightforward replacement needs.

Listed on Amazon as: Sthus40mm Half Moon Silencer Muffler Exhaust Black For 49cc 60cc 66cc 80cc 2-Stroke Engine Motor Motorized Bicycle Bike

#10

10. FLYPIG Chrome Muffler

• Compatible with Vehicle Type: Bicycle
• Material: Iron

Best for: For bolt-on chrome replacements.

Why it ranks #10: This bolt-on iron muffler is listed for 49cc–80cc bicycles, but provides fewer fit details than the other options, such as mounting-hole spacing.

A listed bolt-on installation type makes the FLYPIG chrome muffler a clearly specified option for 49cc–80cc 2-stroke motorized bicycles. Its iron construction and 29.33-inch listed length give buyers material and size details to consider when replacing a stock exhaust pipe.

The bolt-on installation type identifies how the muffler attaches, while the listed 29.33-inch length and 1.97-inch width offer physical dimensions to consider for routing and clearance. Fitment covers 49cc, 50cc, 60cc, 66cc, and 80cc 2-stroke bicycle engines. The iron pipe is described as easy to install and comes as one stock exhaust muffler. The listing identifies it as an aftermarket replacement, a relevant distinction for buyers seeking a non-genuine part.

Skip it if you need a genuine replacement part; this listing identifies the FLYPIG muffler as aftermarket.

This FLYPIG pipe suits owners of listed 49cc–80cc 2-stroke bicycles who want a bolt-on chrome replacement and can use its stated dimensions for clearance planning. Note that it is explicitly an aftermarket, not genuine, item.

Listed on Amazon as: FLYPIG Chrome Muffler Exhaust Pipe for 49cc 50cc 66cc 80cc