- Flapen Score
- 44 / 100Ranks 5,081 of 7,287 Automotive niches · −5 vs the category median of 4944
- Market size
- $103K/yr42K searches / yr
- 90-day growth
- -8.0%search demand this quarter
- Competition
- 54%top-5 click share · 14 brands · 38 sellers
Flapen Score
Shim Kit against its category
The dotted line is the Automotive average. Past it, Shim Kit is stronger. Inside it, weaker.
Market
The Shim Kit market on Amazon at a glance
Shoppers on Amazon United States searched for Shim Kit 42K times last year and spent an estimated $103K. The top 5 brands take 83% of clicks. Flapen scores it 44 out of 100, a Fail.
01 · Demand
An estimated 4.5% of those searches ended in a purchase.
Shoppers searched for this 42K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 4.5% of those searches ended in a purchase. Searches in the last 90 days moved -8.0% against the 90 days before. Searches, conversion and average price together put the market at an estimated $103K a year.
- Searches, last 12 months
- 42K
- Growth, 90 days vs prior 90
- -8.0%
- Conversion, latest week
- 4.5%
- Market size, estimated
- $103Ka year
- Peak month
- April1.4× the quietest month
- Top search term
- valve shim kit12K searches a year
02 · Price
A sale here is worth $54.09.
Listings sell for $54.09 on average, from $10.03 to $228.97. Amazon reports units sold in ranges. This niche sold 2K to 2K a year. The average listing sells 0 to 100 of them. At $54.09 that is $0 to $5K a year per listing.
- Average price
- $54.09inside the $15 to $100 sweet spot
- Price range
- $10.03–$228.97
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 2K–2K
- Units per listing a year
- 0–100
- Revenue per listing a year
- $0–$5K
- Returns
- 2.5%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is ads.
93% of listings pay for placement with sponsored ads. 96% ship with Prime. On an average day, 0.6% of listings are out of stock. The average listing ranks #127 within Engines & Engine Parts. It carries 144 reviews at 4.59 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 93%
- Prime listings
- 96%
- Out of stock, average day
- 0.6%
- Average rank
- #127in Engines & Engine Parts
- Average rating
- 4.59 starsAmazon United States average 4.42 stars
- Average reviews
- 144per listing
- Listings tracked
- 28
04 · Newcomers
3 of last year's 4 launches cleared the first-year sales bar.
4 products launched here in the last 12 months. 3 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 58 months on average, so the names here are settling in.
- Launched, last 12 months
- 4
- Successful launches
- 3Amazon's first-year sales bar
- Average brand age
- 58 months
Products
Top Shim Kit products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 9, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Hot Cams 7.48mm Complete Shim Kit HCSHIM01 for Honda CRF Kawasaki KX Suzuki RMZ Yamaha WR YZ Dirt Bikes
- Price
- $86.10
- Rating
- 4.7/5
- Reviews
- 917
- Age
- 19y ago

Hot Cams 9.48mm Complete Shim Kit HCSHIM02 for Arctic Cat DVX 400 ATV Honda TRX ATV Kawasaki KFX ATV Suzuki LT-R ATV Yamaha YFZ ATV Regular
- Price
- $81.89
- Rating
- 4.6/5
- Reviews
- 918
- Age
- 19y ago

TACSHIM Black 1/2x28 Barrel Shim Kit for .223 5.56 (14 Pack)
- Price
- $14.01
- Rating
- 4.7/5
- Reviews
- 185
- Age
- 2y ago

47Pcs 7.48mm Valve Shim Kit for Honda CRF 250R/X Kawasaki KX 250F Suzuki RMZ 250 Yamaha YZ 250F WR 250F Dirt Bikes
- Price
- $27.95
- Rating
- 4.6/5
- Reviews
- 92
- Age
- 4y ago

TACSHIM Black 5/8x24 Barrel Shim Kit for .308 7.62mm 300BLK .30 Cal (14 Pack)
- Price
- $14.04
- Rating
- 4.7/5
- Reviews
- 134
- Age
- 2y ago
Trending
estimated 90-day click momentum
304 Stainless Steel Shim Kit 100 PCS 2 x 2 Slotted Shims Assortment 10 Thicknesses for Machine Leveling Motor Alignment & Equipment Adjustment Laser-Marked Sizes with Storage Case
- Price
- $86.62
- Rating
- 4.5/5
- Reviews
- 55
- Age
- 6mo ago

AWSZH Adjustable Valve Shim Kit 7.48mm Compatible with Honda CRF250X 2004-2017 Kawasaki KLX250 1979-1980 Suzuki TL1000S 1997-2001 Yamaha FZS600 FZ6 2004-2007 Yamaha YZF-R6 1999-2009 Dirt Bikes(47Pcs)
- Price
- $33.22
- Rating
- 4.3/5
- Reviews
- 3
- Age
- 1y ago

100PCS 304 Stainless Steel Shim Kit 2 x 2 Slotted Assortment Box
- Price
- $87.78
- Rating
- 4.4/5
- Reviews
- 31
- Age
- 1w ago

OTOM D9.48mm Thick 1.20-3.50mm Adjustable Valve Shim Kit for CRF450R CRF450X/RX YZ450F WR450F(141PCS)
- Price
- $66.78
- Rating
- 4.7/5
- Reviews
- 125
- Age
- 5y ago

PlasmaGal - 1/2 x 28 Muzzle Shim Kit for .223 & 5.56 Calibers (20 Pieces) Stainless Steel Barrel Washers for Perfect Alignment (4 Units x 5 Thickness - 0.004/0.008/0.012/0.020/0.040)
- Price
- $11.86
- Rating
- 4.6/5
- Reviews
- 119
- Age
- 2y ago
Newest
by launch date
100PCS 304 Stainless Steel Shim Kit 2 x 2 Slotted Assortment Box
- Price
- $87.78
- Rating
- 4.4/5
- Reviews
- 31
- Age
- 1w ago

304 Stainless Steel Shim Kit 100 PCS 2 x 2 Slotted Shims Assortment 10 Thicknesses for Machine Leveling Motor Alignment & Equipment Adjustment Laser-Marked Sizes with Storage Case
- Price
- $86.62
- Rating
- 4.5/5
- Reviews
- 55
- Age
- 6mo ago

Shimeyao 80 Pcs Size A 2 x 2 Stainless Steel Slotted Shims Kit Composite Precision Metal Shims Stock for Leveling Assortment with Storage Box 8 or 13 Thicknesses for Machinist Motor Shop Wood Door
- Price
- $89.05
- Rating
- 4.1/5
- Reviews
- 23
- Age
- 1y ago

TACSHIM Barrel Nut Shim Kit for .308 (16 Pack) MFR#10BN
- Price
- $13.05
- Rating
- 4.8/5
- Reviews
- 40
- Age
- 1y ago

AWSZH Adjustable Valve Shim Kit 7.48mm Compatible with Honda CRF250X 2004-2017 Kawasaki KLX250 1979-1980 Suzuki TL1000S 1997-2001 Yamaha FZS600 FZ6 2004-2007 Yamaha YZF-R6 1999-2009 Dirt Bikes(47Pcs)
- Price
- $33.22
- Rating
- 4.3/5
- Reviews
- 3
- Age
- 1y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 54% of clicks. Leaders hold, but buyers still shop past them.
Brands
14 flat
Sellers
38
Est. top-5 brand share
83%
Top 20: 100%
Est. top-5 click share
54%
Top 20: 92%
Open market
13%
- Hot Cams40%
- TACSHIM29%
- MUYIDP6%
- PROOTOM5%
- Easily4%
- GtohHavea3%
- Open — no brand owns it (8 brands, 13%)
Demand
Shim Kit search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.4×
Search terms
Top Shim Kit search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- valve shim kit12K/yr
- shim kit11K/yr
- ar shim kit6K/yr
- valve shims5K/yr
- slotted shims3K/yr
- hot cams shim kit4K/yr
- barrel shims3K/yr
Reviews and returns
What reviews say buyers love and hate about Shim Kit
We read the reviews and the return reasons for every product selling here.
“Thickness variations are noticeable”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
14 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Shim Kit questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









