---
title: "Harley Davidson Spark Plugs — $78K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/harley-davidson-spark-plugs"
last_updated: "2026-08-10T22:03:38.003Z"
locale: en
meta:
description: "Niche score 49/100 · $78K/yr market · 71K searches/yr · $18.88 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 49/100 · $78K/yr market · 71K searches/yr · $18.88 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Harley Davidson Spark Plugs — $78K/yr Amazon US Niche (2026) - Flapen"
---
# **harley davidson spark plugs**
**Skip it**
A small market ($78K/yr) — this niche doesn't clear our bar today.
Market size 19Growth 64Conversion 65Competition 22Returns 82Price range 74Avg price 85Brand share 19Review moat 72Quality gap 45
**Avg price**
**Great****$18.88**
avg listing price — sweet spot $15–$100
**Returns**
**Great****1.7%**
return rate — above 5% kills the launch gate
**Price range**
**Good****$6.55–$38.94**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Good****612.07**
avg incumbent reviews — the moat a new listing must climb
**Conversion**
**Good****5.8%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Good****+42.4%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Competition**
**Bad****73%**
top-5 click share — a locked-up shelf
**Market size**
**Bad****$78K**
$78K/yr · 71K searches
**Brand share**
**Bad****93%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, harley davidson spark plugs is a $78K/yr Amazon United States market (71K searches/yr). The top 5 brands hold 93% of demand. Verdict: Skip it — 49/100.
Data updated Jul 11, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **harley davidson spark plugs market data**
- **Units sold / yr**
- **4K–5K**
- avg 100–250/product
- **Revenue / yr**
- **$76K–$94K**
- units × avg price
- **Conversion rate**
- **5.8%**
- **Avg BSR**
- **#852**
- **Page quality**
- **0%**
- **Prime**
- **86%**
- **Sponsored**
- **79%**
- **Out of stock**
- **1.1%**
- **Avg brand age**
- **48 months**
- **Avg seller age**
- **169 days**
## **Competition & brand share**
The top 5 products capture 73% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**8 **▼falling
**Sellers**
**51**
**Top-5 brand share**
**93%**
Top 20: 100%
**Top-5 click share**
**73%**
Top 20: 100%
**Open market**
**4%**
- NGK71% - V-Twin9% - TORCH5% - CNPAPC4% - Motoforti4% - Atesilor3% - Open — no brand owns it (2 brands, 4%)
## **Demand**
Weekly Amazon search volume, last 40 weeks — +42.4% search growth over the last 90 days.
2K1KSpike '26Oct '25Nov '25Dec '25Feb '26Mar '26May '26Jun '26
[**Open Trend **](https://flapen.com/research/us/automotive/harley-davidson-spark-plugs/trend)
## **Top harley davidson spark plugs search terms**
- **ngk dcpr7e**8K/yr+71.0%7.1% conv. - **harley spark plug wires**9K/yr+13.6%0.6% conv. - **harley davidson spark plugs**8K/yr+29.1%2.5% conv. - **6r12 spark plug harley davidson**5K/yr+63.1%7.5% conv. - **harley davidson spark plug wires**5K/yr+39.0%0.6% conv. - **motorcycle spark plugs**5K/yr+35.6%0.4% conv. - **ngk dcpr7eix**4K/yr+60.1%16.6% conv. - **dcpr7eix**4K/yr+88.3%12.2% conv. - **harley spark plugs**5K/yr+9.6%3.9% conv. - **screaming eagle spark plug wires**4K/yr+41.9%0.2% conv. [**All search terms **](https://flapen.com/research/us/automotive/harley-davidson-spark-plugs/search-terms)
## **Top harley davidson spark plugs 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.
0%10%$8K20%$16K30%$23K40%$31K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 14 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**NGK Iridium IX DCPR7EIX Spark Plugs Compatible with 1999-2016 Harley Davidson Twin Cam (Pair)**NGK**$20.62**4.7★4,931 rev](https://www.amazon.com/dp/B003BUCNNS) [2**NGK DCPR7EIX Spark Plug (2 Pack)**NGK**$22.00**4.7★1,499 rev](https://www.amazon.com/dp/B003BUCSAG) [3**V-Twin Performance Spark Plugs Replaces Harley spark plug #6R12.**V-Twin**$25.38**4.6★59 rev](https://www.amazon.com/dp/B07NPWCSTC) [4**NGK # 6046 Iridium Spark Plugs -- DCPR7EIX -- Compatible with Harley-Davidson Twin Cam and XL --- 4 PCS NEW**NGK**$38.94**4.6★282 rev](https://www.amazon.com/dp/B00MG79MX6) [5**NGK (3932) DCPR7E Spark Plug - Pack of 4**NGK**$23.33**4.6★259 rev](https://www.amazon.com/dp/B00BPD8R74)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**SYKRSS DCPR7EIX Iridium Spark Plugs 2 Pack - Compatible with Fiat 500 2012-2017 1.4L L4 Chevy Spark 2013-2015 1.2L L4 Engine - Replaces 97637 6046 Spark Plug**SYKRSS**$12.95**329 rev1y ago](https://www.amazon.com/dp/B0F1XFD8T5) [**Atesilor 10.4mm Spark Plug Wires Ignition Coil Wires Compatible with Harley-Davidson Big Twin Dyna Super Glide/Wide Glide/Low Rider 2000-2017 & Softail Springer/Slim/Deluxe/Deuce 1999-2017 (Black)**Atesilor**$17.79**47 rev1y ago](https://www.amazon.com/dp/B0DK1LDH8M) [**TORCH 4pcs DK7RIU Iridium Spark Plugs Replace for NGK DCPR7E for BOSCH YR7DC+ Spark Plug for CHAMPION RA8HC/T04 for DENSO XU22EPR-U/3179/XU22EPR Spark Plug OEM**TORCH**$22.67**53 rev3y ago](https://www.amazon.com/dp/B0C9D24K25) [**BDFHYK Set of 4 Iridium Spark Plug Compatible with Harley-Davidson 1988-2016 Sportster 1200 1986-2016 Sportster 883 Engine Replacement for DCPR7EIX 6046 9701 97637**BDFHYK**$18.44**39 rev3y ago](https://www.amazon.com/dp/B0C77LN2PC) [**TORCH DK7RTC Spark Plug Replace for NGK DCPR7E Spark Plug for BOSCH YR7DC+ Spark Plug for CHAMPION 809/8809/OE083/RA6HC/RA8HC Spark Plug for DENSO IXU22/VXU22/XU22EPR-U/XU22TT Spark Plug OEM ea**TORCH**$6.55**70 rev4y ago](https://www.amazon.com/dp/B00264F3ZA)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**NGK Genuine DCPR7E Spark Plug**NGK**$15.53**3.8★**▲ 83%**](https://www.amazon.com/dp/B003CPZ1JA) [**BDFHYK Set of 4 Iridium Spark Plug Compatible with Harley-Davidson 1988-2016 Sportster 1200 1986-2016 Sportster 883 Engine Replacement for DCPR7EIX 6046 9701 97637**BDFHYK**$18.44**4.3★**▲ 39%**](https://www.amazon.com/dp/B0C77LN2PC) [**TORCH 4pcs DK7RIU Iridium Spark Plugs Replace for NGK DCPR7E for BOSCH YR7DC+ Spark Plug for CHAMPION RA8HC/T04 for DENSO XU22EPR-U/3179/XU22EPR Spark Plug OEM**TORCH**$22.67**4.6★**▲ 22%**](https://www.amazon.com/dp/B0C9D24K25) [**SYKRSS DCPR7EIX Iridium Spark Plugs 2 Pack - Compatible with Fiat 500 2012-2017 1.4L L4 Chevy Spark 2013-2015 1.2L L4 Engine - Replaces 97637 6046 Spark Plug**SYKRSS**$12.95**4.5★**▲ 13%**](https://www.amazon.com/dp/B0F1XFD8T5) [**NGK # 6046 Iridium Spark Plugs -- DCPR7EIX -- Compatible with Harley-Davidson Twin Cam and XL --- 4 PCS NEW**NGK**$38.94**4.6★**▲ 11%**](https://www.amazon.com/dp/B00MG79MX6)
**~~View all trending →~~**
## **What buyers say about harley davidson spark plugs**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**23%
*“Quality Products”*
**Socket/Port/Plug**18%
*“Plugs great”*
**Value For Money**17%
*“Excellent price”*
**Size-Overall**15%
*“good fit”*
**Advertised Vs Actual Product**12%
*“Works as it should”*
**Efficiency**7%
*“Did the job”*
**Durability**3%
*“040 so it's good to know these are as durable as they're advertised to be”*
**Ease Of Use**1%
*“Ease of use”*
**Assembly/Installation**1%
*“they where easy to install yes you do need to gap them”*
### **What buyers complain about **
**Advertised Vs Actual Product**25%
*“not listed right”*
**Size-Overall**13%
*“The longer wire was a bit long”*
**Compatibility-Overall**13%
*“Not compatible with older Harley models that it ought to fit”*
**Quality-Overall**13%
*“why not make a good product”*
**Socket/Port/Plug**13%
*“The plug end that goes in the solenoid is too small”*
### **Top return reasons **
**Size-Overall**54%
**Compatibility-Overall**15%
**Socket/Port/Plug**7%
**Advertised Vs Actual Product**5%
**Defective Material/Parts**5%
**Value For Money**3%
**Product Condition**3%
**Functionality-Overall**2%
**Color**2%
**Quality-Overall**1%
## **Common questions**
- **Is harley davidson spark plugs profitable to sell on Amazon United States?**
- The niche generates $78K/yr across 14 tracked products. 90-day search growth is +42.4%. Flapen's verdict: Skip it (49/100).
- **How competitive is the harley davidson spark plugs niche?**
- 8 brands and 51 sellers compete. The top 5 products take 73% of clicks and top 5 brands hold 93% of demand.
- **What do buyers complain about in harley davidson spark plugs?**
- Top complaints mined from reviews: Advertised Vs Actual Product, Size-Overall, Compatibility-Overall. The return rate is 1.7%.
- **What does it cost to enter the harley davidson spark plugs niche?**
- Listings span $6.55–$38.94; the average listing price is $18.88 (sweet spot $15–$100). The average incumbent carries 612 reviews — the moat a new listing must climb.
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