The best full exhaust system for a motorcycle depends on the bike’s exact make, model, and year: the listed options include systems for Harley-Davidson Touring models, Kawasaki Z650 and Ninja 650 motorcycles, Vespa GTS 300 scooters, and mini dirt bikes. The Yier system is aimed at small pit bikes, while the III BLACK3 system targets touring riders. One listed product is a slip-on muffler rather than a complete system, so it is included only as an alternative.
| Product | Best suited for | Important distinction |
|---|---|---|
| III BLACK3 2-into-1 | Harley-Davidson Touring owners | 304 stainless steel construction |
| Yier 38 mm system | Mini dirt and pit bikes | One-piece pipe and muffler |
| Kawasaki Z650/Ninja 650 system | Listed Kawasaki model years | Includes a silencer |
| Vespa GTS 300 system | Listed GTS 300 years | Verify the unusual feature description |
| Carbon-fiber slip-on muffler | Riders seeking a muffler replacement | Not a full exhaust system |
III BLACK3 2-Into-1 Touring Exhaust
This complete 2-into-1 exhaust is listed for Harley-Davidson Touring models from 2009–2026, including Street Glide, Road Glide, Road King, and Electra Glide variants. Confirm the exact model and year before ordering.
Best for: Touring riders seeking a full system with stainless steel construction. The headers and muffler body are described as 304 stainless steel, and the product includes stainless steel heat shields, a forged aluminum alloy end cup, and titanium alloy screws.
The listing describes equal-length front and rear pipes intended to balance exhaust pulses and reduce vibration. These are stated design aims, not independently verified performance results. Limitation: The broad fitment range makes checking the exact motorcycle configuration especially important.
Yier 38 Mm Mini-Bike Exhaust System
This one-piece system runs from the head pipe to the tail section. The listing names CRF70F, CRF70, XR70, CRF110F, and several pit-bike brands, and mentions engine sizes from 70cc to 150cc. Check the bike’s exhaust connection and model before purchase; the listed application range is broad.
Best for: Mini dirt-bike or pit-bike owners who need a complete pipe and muffler rather than a muffler alone. The stated dimensions are a 38 mm head, 45 mm eye-to-eye measurement, 635 mm pipe length, and 255 mm muffler length. A removable pipe guard is included.
The listing describes a deeper exhaust sound and use with stock or modified engines. Limitation: Sound preference is subjective, and the product details do not specify noise levels.
Kawasaki Z650 And Ninja 650 Exhaust
This full system is listed for Kawasaki Z650 and Ninja 650 motorcycles from 2017–2023. It is described as a replacement or upgrade, with an internal flow design and an included exhaust silencer.
Best for: Owners of the specifically listed Kawasaki models who want a complete system with a silencer. The product description says the design supports exhaust flow, aims to limit water accumulation in the pipe, and reduces exhaust sound during operation.
Limitation: The listing does not provide detailed construction materials or measured sound output. Verify fitment for the exact year and motorcycle variant rather than relying on the model name alone.
Vespa GTS 300 Full Exhaust System
This listing identifies a modified full exhaust system with a carbon muffler and DB killer for Vespa GTS 300 models from 2007–2023. It is presented for customization or replacement, so confirm that the specific year and configuration match your scooter.
Best for: GTS 300 owners considering a system with a DB killer and carbon-style muffler. The listing describes a sleek design and installation with standard tools and basic mechanical knowledge.
Limitation: The supplied feature text also describes plastic body panels, fenders, and skid plates, which do not clearly relate to an exhaust system. Contact the seller to verify the actual included parts and materials before ordering.
Carbon-Fiber Slip-On Muffler Alternative
This is a slip-on muffler, not a full exhaust system. The listing describes a 2-inch outlet and adjustable stainless steel adapter for 38–51 mm pipes, and names bikes including the Kawasaki Z900, Suzuki GSXR750, and Honda CBR650.
Best for: Riders who need a muffler replacement or slip-on option rather than new headers and a complete exhaust. The listing says minor cutting and welding may be needed for many installations, while also claiming no modification is needed for certain named bikes.
Limitation: Fitment and installation requirements vary by motorcycle. Confirm the pipe diameter and application; do not select this product if you need a complete system.
Buying Guide: How To Choose A Motorcycle Full Exhaust
Does the system fit your exact motorcycle?
Start with the manufacturer, model, year, and engine configuration. Exhaust fitment can vary even within one model family. Compare the listing’s stated application to your motorcycle’s identification information, and ask the seller about uncertain variants before ordering.
Do you need a full system or a slip-on?
A full system replaces the exhaust assembly described in its listing, which may include pipes and a muffler. A slip-on generally refers to a muffler component and may retain existing pipes. The carbon-fiber-style option above is explicitly a slip-on, so it is not equivalent to the other complete systems.
Which construction and sound details matter?
Compare stated materials, included heat shields, silencer or DB killer, and any listed dimensions. Do not assume that a product’s sound description indicates a particular decibel level. Local noise and emissions rules may apply, so check relevant requirements before modifying a road-going motorcycle.
What should you verify before installation?
Check included components, pipe measurements, mounting points, and whether installation requires cutting or welding. The available product descriptions do not establish that every system includes all hardware or fits every variation in a broad model range. A qualified motorcycle mechanic can help assess installation needs.
Frequently Asked Questions
What is the difference between a full exhaust and a slip-on?
A full exhaust system replaces more of the exhaust assembly, while a slip-on is a muffler-focused component. Check each listing’s included parts to confirm what is supplied.
Can I choose a system based only on engine size?
No. Engine size alone does not confirm fitment. Match the motorcycle’s make, model, year, and exhaust connection to the product listing.
Does a DB killer make an exhaust street legal?
Not necessarily. A DB killer is a sound-reduction component, but the listing does not establish legal compliance. Check local regulations and applicable requirements.
Should I install a full exhaust myself?
Installation depends on the motorcycle and system. Review the seller’s instructions and stated installation requirements; seek professional help if the job requires cutting, welding, or specialized mechanical work.