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125cc engine

Skip it49/100

a small market ($37K/yr) — 125cc engine doesn't clear our bar today.

Market/yr

$37K

Growth (1y)

+186.2%

Products

18

Brands

15

was 16 a year ago

Sellers

16

Price range

$148.00–$479.58

Returns

0.0%

Rating

4.1★

49/100

Skip it

Scored 49/100 across market size, growth, competition, quality gap, and returns.

Market sizeGrowthCompetitionQuality gapReturns
Market size
2
×0.30
Growth
75
×0.30
Competition
41
×0.20
Quality gap
79
×0.10
Returns
100
×0.10

Demand

Weekly Amazon search volume, last 104 weeks — +186.2% year over year.
6K3KSpike '25Spike '26Jul '24Nov '24Mar '25Jul '25Nov '25Mar '26

Seasonality

Monthly demand index across the year — 1.00 is average.

Peak months: Apr, May · busiest ÷ quietest = 1.6×

Competition

42%LIYUANJUN
  • LIYUANJUN42%
  • TBVECHI10%
  • Knwigoe8%
  • NAZEAOB7%
  • Offabing6%
  • siohdagu4%
  • Other (9 brands)23%

The top 5 products take 63% of clicks — established leaders, but buyers still shop beyond them. 15 brands and 16 sellers compete here.

Brands

15 falling

was 16 a year ago

Sellers

16

Top 5 brand share

73%

#ProductBrandPriceRatingReviewsClick shareTrend

Product shelf

All 18 tracked products in this niche.

LIYUANJUN 125CC 4-Stroke Engine Motor Kit Single Cylinder Air-Cooled Motor Engine for Honda CRF50 XR50 CRF70 Z50R QR50 Dirt Pit Bike Engine Kit with Manual Clutch and PZ22 Carburetor

LIYUANJUN 125CC 4-Stroke Engine Motor Kit Single Cylinder Air-Cooled Motor Engine for Honda CRF50 XR50 CRF70 Z50R QR50 Dirt Pit Bike Engine Kit with Manual Clutch and PZ22 Carburetor

LIYUANJUN

$148.704.3★71 reviews

LIYUANJUN 125CC Engine Motor 4-Stroke Semi Auto Engine for Go Kart ATV Quad Bike Buggy CDI/Air Cooling System Single-Cylinder with Reverse and 3 Forward Electrical Start

LIYUANJUN 125CC Engine Motor 4-Stroke Semi Auto Engine for Go Kart ATV Quad Bike Buggy CDI/Air Cooling System Single-Cylinder with Reverse and 3 Forward Electrical Start

LIYUANJUN

$181.484.0★29 reviews

Knwigoe 125cc 4 Stroke Engine Motor Complete Kit Electric Start ATV Motor Semi-Auto Transmission Dirt Bike Engine with CDI Ignition Single Cylinder for Honda Pit Bike Motorcycle Go Kart

Knwigoe 125cc 4 Stroke Engine Motor Complete Kit Electric Start ATV Motor Semi-Auto Transmission Dirt Bike Engine with CDI Ignition Single Cylinder for Honda Pit Bike Motorcycle Go Kart

Knwigoe

$163.624.0★31 reviews

TBVECHI 4-Stroke 125CC Air-Cooled Engine Motor with Kick Start and Reverse for Honda CRF50 CRF70 XR50 XR70 Dirt Pit Bike Motorcycle Spark Plug A7TC

TBVECHI 4-Stroke 125CC Air-Cooled Engine Motor with Kick Start and Reverse for Honda CRF50 CRF70 XR50 XR70 Dirt Pit Bike Motorcycle Spark Plug A7TC

TBVECHI

$179.024.4★10 reviews

125cc 4 Stroke Engine Motor CDI Pit Dirt Bike Single Cylinder Manual Clutch Engine Motor Kit Fit for Honda CRF50 CRF70 XR50 XR70 Z50 Spark Plug A7TC Carburetor PZ16J

125cc 4 Stroke Engine Motor CDI Pit Dirt Bike Single Cylinder Manual Clutch Engine Motor Kit Fit for Honda CRF50 CRF70 XR50 XR70 Z50 Spark Plug A7TC Carburetor PZ16J

Offabing

$148.004.0★10 reviews

125CC 4-Stroke Semi Auto Engine Motor ATV Quad Engine Motor Complete Kit 4 Speed Electric Starter Motorcycle Engine W/Reverse Electric Starter Single Cylinder Air-Cooling(Black)

125CC 4-Stroke Semi Auto Engine Motor ATV Quad Engine Motor Complete Kit 4 Speed Electric Starter Motorcycle Engine W/Reverse Electric Starter Single Cylinder Air-Cooling(Black)

siohdagu

$172.903.9★23 reviews

NAZEAOB 125cc 4 Stroke Engine Motor Semi-Auto ATV Engine Motor Kit with CDI Ignition & Electrical Start Single Cylinder Air-Cooling Motorcycle Engine with 3 Forward and Reverse

NAZEAOB 125cc 4 Stroke Engine Motor Semi-Auto ATV Engine Motor Kit with CDI Ignition & Electrical Start Single Cylinder Air-Cooling Motorcycle Engine with 3 Forward and Reverse

NAZEAOB

$193.605.0★1 reviews

TBVECHI 140cc Engine Motor For Pit Dirt Bike SSR Apollo Coolster 125cc XR50 ATC70 ST90K1 CS90 4-Stroke Engine Motor Replacement Kits

TBVECHI 140cc Engine Motor For Pit Dirt Bike SSR Apollo Coolster 125cc XR50 ATC70 ST90K1 CS90 4-Stroke Engine Motor Replacement Kits

TBVECHI

$218.153.8★15 reviews

Reviews

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

What buyers love

Motor Power41%

“Perfect for my replacement motor”

Value For Money10%

“a 125cc 4 speed motor for 250$ sounds like a good deal”

Efficiency9%

“Works great and runs smooth”

Size-Overall7%

“Fits”

Compression5%

“Definitely has compression”

Quality-Overall4%

“Robust Build Quality”

Assembly/Installation4%

“ran great, was easy to install”

Strength4%

“Been going strong so far”

Ease Of Use3%

“is super easy”

Advertised Vs Actual Product2%

“As described and no issues so far”

What buyers complain about

Assembly/Installation18%

“i had a issue with install”

Functionality-Overall16%

“Fail to make it work”

Instructions/User Manual/Troubleshooting13%

“the delivery Person could not follow instruction”

Quality-Overall8%

“Junk”

Durability5%

“It broke”

Mechanism Issues5%

“The motor mount holes allow the motor to shift causing constant loosening of the chain”

Defective Material/Parts5%

“Cracked case”

Leak-Proof4%

“Did have a oil leak”

Heating3%

“Runs terrible, blows oil, and gets terribly hot”

Lubrication3%

“Be mindful as it is totally unusable if it cannot hold any oil”

Top return reasons

  • Defective Material/Parts19%
  • Motor Issues18%
  • Compatibility-Overall12%
  • Size-Overall11%
  • Leak-Proof11%
  • Functionality-Overall10%
  • Compression5%
  • Flammable2%
  • Rusts/Corrodes2%
  • Ease Of Use2%

Data scraped July 9, 2026 · Marketplace baseline: 4.4★ avg rating · $22.66 median price · 2.2% median returns across 14,418 tracked niches.