Is ninja 400 exhaust profitable to sell on Amazon United States?

The niche generates $9K/yr across 17 tracked products. 0 of 6 products launched in the last 360 days are still selling. 90-day search growth is +32.6%. Flapen's verdict: Skip it (43/100).

How competitive is the ninja 400 exhaust niche?

13 brands and 17 sellers compete. The top 5 products take 67% of clicks and top 5 brands hold 77% of demand.

What do buyers complain about in ninja 400 exhaust?

Top complaints mined from reviews: Noise Level, Quality-Overall, Paint Quality. The return rate is 7.6% — above our launch gate.

When does demand for ninja 400 exhaust peak?

Demand peaks in Apr–Jul–Aug–Sep; the busiest month runs 2.6× the quietest.

What does it cost to enter the ninja 400 exhaust niche?

Listings span $24.82–$117.35; the average listing price is $55.73 (sweet spot $15–$100). The average incumbent carries 115 reviews — the moat a new listing must climb.

ninja 400 exhaust

Skip it

A small market ($9K/yr) — this niche doesn't clear our bar today.

Review moat

Great114.65

avg incumbent reviews — the moat a new listing must climb

Avg price

Great$55.73

avg listing price — sweet spot $15–$100

Quality gap

Great4.2★

avg incumbent rating — lower means beatable quality

Price range

Great$24.82–$117.35

cheapest to priciest tracked listing — scored on the share inside $15–$100

Growth

Good+32.6%

90-day search growth — must beat 0% to launch

Brand share

Okay77%

top-5 brand share — brands hold most of the demand

Competition

Okay67%

top-5 click share — leaders hold, buyers still browse

Conversion

Bad1.4%

search→purchase rate — share of searches ending in a sale

Returns

Bad7.6%

return rate — above 5% kills the launch gate

Market size

Bad$9K

$9K/yr · 12K searches

Signals High Returns High Price Out of Stock

According to Flapen's Amazon United States niche tracking, ninja 400 exhaust is a $9K/yr Amazon United States market (12K searches/yr). The top 5 brands hold 77% of demand. Demand peaks in Apr–Jul–Aug–Sep. Verdict: Skip it — 43/100.

Data updated Jul 9, 2026 · scored weekly · How we score niches

ninja 400 exhaust market data

Units sold / yr: 100–250; avg 0–100/product
Revenue / yr: $6K–$14K; units × avg price
Conversion rate: 1.4%
Avg BSR: #447
Page quality: 0%
Prime: 71%
Sponsored: 71%
Out of stock: 6.6%
Avg brand age: 44 months
Avg seller age: 263 days

Competition & brand share

The top 5 products take 67% of clicks — established leaders, but buyers still shop beyond them.

Brands

13 falling

Sellers

Top-5 brand share

77%

Top 20: 100%

Top-5 click share

67%

Top 20: 100%

Open market

18%

PACEWALKER22%
JFG RACING20%
Lesiyou16%
WATERWICH10%
Generic9%
YZCHAIN5%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +32.6% search growth over the last 90 days.

Peak months: Apr, Jul, Aug, Sep · busiest ÷ quietest = 2.6×

Open Trend

Top ninja 400 exhaust search terms

ninja 400 exhaust8K/yr +49.0%0.9% conv.
ninja 400 slip on exhaust2K/yr +12.6%1.2% conv.
kawasaki ninja 400 exhaust2K/yr -6.7%0.3% conv.

All search terms

Top ninja 400 exhaust products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)6 products missing review or click data not plotted

All 17 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

JFG RACING Motorcycle Slip On Exhaust with Muffler for Ninja 400 2016-2023

JFG RACING$51.444.0★57 rev

Lesiyou Motorcycle Muffler Mid Pipe Muffler Adapter Connect Pipe Compatible with Kawasaki Ninja 400 Z400 2018 2019 2020 2021 2022 2023 Ninja 500 2024

Lesiyou$59.194.1★111 rev

Exhaust Muffler Carbon Fiber 1.5-2Inlet with Removable DB Killer for Street/Sport Motorcycles and Scooters with 38-51mm Diameter Exhaust Pipes

PACEWALKER$38.164.2★1,384 rev

WATERWICH Motorcycle Muffler Compatible with Kawasaki Ninja 400 Z400 2018 2019 2020 2021 2022 2023

WATERWICH$58.664.2★117 rev

Slip on Exhaust for Kawasaki Ninja 400 Z400 2018-2023 Motorcycle Muffler with Removable Baffle Stainless Steel/Aluminum Easy Installation (No Welding)

YZCHAIN$48.020.0★0 rev

Newest

by launch date

Black Slip-On Exhaust Muffler compatible with GY6 Ninja400 Z400 R3 MT-03

Generic$53.980 rev

1mo ago

autozen Exhaust Muffler Compatible with Kawasaki Ninja 400 Z400 2018 2019 2020 2021 2022 2023 30cm Matte Black with Adapter Connect Pipe Slip-On Motorcycle Exhaust

autozen$48.770 rev

2mo ago

Muffler Exhaust Mid Pipe For NINJA400 Z400 EX400

Generic$96.510 rev

5mo ago

Slip on Exhaust for Kawasaki Ninja 400 Z400 2018-2023 Motorcycle Muffler with Removable Baffle Stainless Steel/Aluminum Easy Installation (No Welding)

YZCHAIN$48.020 rev

6mo ago

YIPONYT Universal Motorcycle Exhaust 1.42-2 Carbon Fiber Slip on Exhaust Muffler Diameter 51mm Exhaust for Motor Dirt Bike Scooters with Complete Accessories Black

YIPONYT$39.880 rev

8mo ago

What buyers say about ninja 400 exhaust

What buyers praise and complain about, mined from review topics.

What buyers love

Audio Quality15%

“Sounds great”

Size-Overall12%

“Fits great”

Value For Money12%

“Well worth the money so far”

Quality-Overall11%

“Much better performance”

Assembly/Installation9%

“Easy to install”

Noise Level8%

“The exhaust sounds good”

Efficiency4%

“Worked for me”

Design-Overall3%

“Looks and sounds great”

Durability2%

“Durable”

Advertised Vs Actual Product2%

“Looks and works as advertised”

What buyers complain about

Noise Level14%

“Super loud”

Quality-Overall9%

“Cheap junk”

Paint Quality8%

“Paint and plastic peels after 20 miles”

Size-Overall5%

“it didn't fit on my motorcycle so I had to return the item”

Durability4%

“Ive just recently broken it in”

Material Quality4%

“obviously not carbon fiber”

Compatibility-Overall4%

“This will not fit the xpro 150cc dirt bike unless you buy a 38 to 32mm adaptor”

Mounting3%

“Difficult to mount”

Connectivity-Overall2%

“Nothing to connect to muffler”

Value For Money2%

“Expected from a cheap exhaust”

Top return reasons

Size-Overall60%

Compatibility-Overall14%

Defective Material/Parts4%

Advertised Vs Actual Product3%

Assembly/Installation2%

Value For Money2%

Shape/Style2%

Mounting2%

Functionality-Overall2%

Quality-Overall2%

Common questions

Is ninja 400 exhaust profitable to sell on Amazon United States?: The niche generates $9K/yr across 17 tracked products. 0 of 6 products launched in the last 360 days are still selling. 90-day search growth is +32.6%. Flapen's verdict: Skip it (43/100).
How competitive is the ninja 400 exhaust niche?: 13 brands and 17 sellers compete. The top 5 products take 67% of clicks and top 5 brands hold 77% of demand.
What do buyers complain about in ninja 400 exhaust?: Top complaints mined from reviews: Noise Level, Quality-Overall, Paint Quality. The return rate is 7.6% — above our launch gate.
When does demand for ninja 400 exhaust peak?: Demand peaks in Apr–Jul–Aug–Sep; the busiest month runs 2.6× the quietest.
What does it cost to enter the ninja 400 exhaust niche?: Listings span $24.82–$117.35; the average listing price is $55.73 (sweet spot $15–$100). The average incumbent carries 115 reviews — the moat a new listing must climb.