Harley Piston Rings Only
Harley Bike Piston Rings at JJ Motorsports
Refresh your Harley’s top end with premium piston ring sets from JJ Motorsports, featuring chrome, moly, and high-performance coatings for perfect sealing, reduced blow-by, and maximum durability on Sportster, Big Twin, Evo, Twin Cam, and M8 engines. These precision rings deliver reliable compression and long life.
Shop Hastings, Wiseco, and Revolution Performance rings for proven quality. Explore related categories such as Harley engine for pistons and gaskets, or Harley for cylinders and heads to complete your top-end rebuild.
Top Harley Piston Rings
- Hastings Piston Rings XL-7003 – Chrome-faced ring set for Sportster; excellent wear resistance and oil control.
- Wiseco Ring Set 3504X – High-performance ring set for 3.504" bore; moly-coated top ring for Twin Cam and Evo builds.
- Revolution Performance LLC Ring Set RP4250VMF – Premium ring set for 4.250" bore; designed for high-compression M8 and performance applications.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
KB PERFORMANCE Piston Kit - 124" - +.005" - M8 KB576LCA.005
KB PERFORMANCE
$446.95If you're building or rebuilding a big-inch M8 engine, piston quality directly impacts reliability, ring seal, and power output. KB Performance pistons are engineered to exacting tolerances with proven materials that handle sustained high RPM and boost...09106178- SKU:
- 09106178
- Availability:
- Ships Same Business Day
- Weight:
- 3.15 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 124'
- BORE - OVERSIZE:
- +0,005'
- UNITS:
- KIT
$446.95 -
KB PERFORMANCE Piston Kit KB258.030
KB PERFORMANCE
$233.95If you're building or rebuilding an engine that demands precision and longevity, KB Performance pistons deliver the tight tolerances and superior ring seal that separate a reliable build from a mediocre one. The 390 hypereutectic aluminum alloy...09102017- SKU:
- 09102017
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- BORE OVERSIZE - IMPERIAL:
- +0.030'
- COMPRESSION RATIO IMPERIAL:
- 8.6:1
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.498'
$233.95Qty in Cart: 0Quantity:Price:$233.95Subtotal: -
KB PERFORMANCE Piston Kit KB305.040
KB PERFORMANCE
$246.95If you're serious about maximizing engine performance and longevity, piston quality is non-negotiable. The KB PERFORMANCE Piston Kit KB305.040 delivers the tight tolerances and precision engineering that separate race-grade components from off-the-shelf...09102019- SKU:
- 09102019
- Availability:
- Ships Same Business Day
- Weight:
- 2.70 LBS
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.498'
- COMPRESSION RATIO IMPERIAL:
- 9.6:1
- BORE OVERSIZE - IMPERIAL:
- +0.040'
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
$246.95 -
KB PERFORMANCE Piston Kit - Twin Cam KB409C.STD
KB PERFORMANCE
$236.95If you're building or rebuilding a Twin Cam engine, piston quality directly impacts reliability, power delivery, and ring seal—and that's where KB Performance separates itself from the field. The KB409C.STD uses precision diamond-machining and T-5...09100915- SKU:
- 09100915
- Availability:
- Ships Same Business Day
- Weight:
- 2.60 LBS
- BORE SIZE IMPERIAL:
- 3.875'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
$236.95 -
KB PERFORMANCE Piston Kit - Twin Cam KB409C.010
KB PERFORMANCE
$236.95If you're building a high-performance engine that demands precision and durability, KB Performance pistons deliver the tight tolerances and superior ring seal that separate competitive engines from the rest. The T-5 heat-treated 390 hypereutectic...09100917- SKU:
- 09100917
- Availability:
- Ships Same Business Day
- Weight:
- 2.66 LBS
- BORE SIZE IMPERIAL:
- 3.875'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- UNITS:
- KIT
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
$236.95 -
KB PERFORMANCE Forged Piston Kit KB922C.STD
KB PERFORMANCE
$285.57KB Performance forged pistons deliver the strength and precision your engine demands when boost levels climb or RPM targets exceed stock capabilities. The 4032 aluminum alloy construction resists thermal stress and detonation damage far better than cast...09100930- SKU:
- 09100930
- Availability:
- Ships Same Business Day
- Weight:
- 2.45 LBS
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- BORE SIZE IMPERIAL:
- 3.498'
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- BORE - OVERSIZE:
- STANDARD
- UNITS:
- KIT
$285.57Qty in Cart: 0Quantity:Price:$285.57Subtotal: -
KB PERFORMANCE Forged Piston Kit - Twin Cam KB906C.STD
KB PERFORMANCE
$322.95If you're rebuilding a Twin Cam engine or pushing beyond stock power levels, piston quality directly impacts reliability, longevity, and combustion efficiency. The KB PERFORMANCE Forged Piston Kit delivers OEM-grade construction with forged 4032 aluminum...09100935- SKU:
- 09100935
- Availability:
- Ships Same Business Day
- Weight:
- 2.41 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- BORE SIZE IMPERIAL:
- 3.875'
- RIDING STYLE:
- STREET
$322.95Qty in Cart: 0Quantity:Price:$322.95Subtotal: -
KB PERFORMANCE Forged Piston Kit - Twin Cam KB909C.STD
KB PERFORMANCE
$322.95If you're rebuilding a Twin Cam engine or pushing higher compression ratios, quality pistons are non-negotiable—they're the foundation of reliability under load. KB Performance's forged 4032 aluminum construction delivers the strength needed for...09100939- SKU:
- 09100939
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- BORE SIZE IMPERIAL:
- 3.875'
- RIDING STYLE:
- STREET
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- UNITS:
- KIT
$322.95 -
KB PERFORMANCE Super-Duty Piston KB909LCA.STD
KB PERFORMANCE
$410.95Piston rock and ring flutter are silent killers of engine efficiency and longevity—they compromise seal integrity, waste power, and introduce unwanted noise. The KB PERFORMANCE Super-Duty Piston KB909LCA.STD eliminates these issues entirely through its...09105044- SKU:
- 09105044
- Availability:
- Ships Same Business Day
- Weight:
- 2.60 LBS
- PISTON MATERIAL:
- ALUMINUM
- UNITS:
- KIT
- DISPLACEMENT:
- 103'
- RIDING STYLE:
- STREET
- BORE SIZE METRIC:
- 98.40 MM
- PRODUCT NAME:
- PISTON KIT
- STROKE LENGTH IMPERIAL:
- 4-3/8'
$410.95Qty in Cart: 0Quantity:Price:$410.95Subtotal: -
KB PERFORMANCE Super-Duty Piston KB661LCA.STD
KB PERFORMANCE
$442.95Piston rock and ring blow-by are silent killers of engine performance and longevity. The KB PERFORMANCE Super-Duty Piston KB661LCA.STD eliminates both through advanced skirt coating technology that self-hones to perfect clearance on startup, giving you...09105047- SKU:
- 09105047
- Availability:
- Ships Same Business Day
- Weight:
- 2.80 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- BORE SIZE METRIC:
- 101.60 MM
- DISPLACEMENT:
- 110'
- PISTON MATERIAL:
- ALUMINUM
- UNITS:
- KIT
$442.95 -
KB PERFORMANCE Super-Duty Piston KB662LCA.STD
KB PERFORMANCE
$410.95The KB PERFORMANCE Super-Duty Piston KB662LCA.STD eliminates common failure points that compromise ring seal and engine longevity. Its proprietary skirt coating technology self-hones to perfect clearance on startup, eliminating piston rock and the noise...09105049- SKU:
- 09105049
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
- DISPLACEMENT:
- 117'
- PRODUCT NAME:
- PISTON KIT
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- UNITS:
- KIT
- BORE SIZE METRIC:
- 104.80 MM
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
$410.95 -
KB PERFORMANCE Piston - Evolution KB920C.010
KB PERFORMANCE
$299.95A piston's job is simple: survive extreme combustion pressures while maintaining precision fit and minimal friction. The KB PERFORMANCE Evolution KB920C.010 delivers this through forged 4032 aluminum construction, offset pin geometry for quieter...09105056- SKU:
- 09105056
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- COMPRESSION RATIO IMPERIAL:
- 9.5:1
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- +0,010'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.498'
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
$299.95 -
KB PERFORMANCE Piston - Evolution KB921C.005
KB PERFORMANCE
$299.95KB Performance's Evolution KB921C.005 pistons deliver the reliability and precision required for sustained high-RPM operation. Built from 4032 aluminum alloy and featuring an offset pin design, these forged pistons minimize noise while maximizing...09105058- SKU:
- 09105058
- Availability:
- Ships Same Business Day
- Weight:
- 2.70 LBS
- BORE - OVERSIZE:
- +0,005'
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- BORE SIZE IMPERIAL:
- 3.498'
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- RIDING STYLE:
- STREET
$299.95Qty in Cart: 0Quantity:Price:$299.95Subtotal: -
KB PERFORMANCE Forged Piston Kit - Twin Cam KB660C.STD
KB PERFORMANCE
$322.95If you're running a twin-cam engine at the limit, stock pistons won't cut it. The KB PERFORMANCE Forged Piston Kit delivers the durability and precision you need for serious boost, high RPM, and sustained performance without compromise. Built from forged...09103970- SKU:
- 09103970
- Availability:
- Ships Same Business Day
- Weight:
- 2.65 LBS
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- BORE SIZE IMPERIAL:
- 3.875'
- RIDING STYLE:
- STREET
$322.95Qty in Cart: 0Quantity:Price:$322.95Subtotal: -
KB PERFORMANCE Forged Piston Kit - Twin Cam KB662C.STD
KB PERFORMANCE
$322.95When your engine demands precision and reliability at high RPM, factory pistons simply won't cut it. The KB PERFORMANCE Forged Piston Kit delivers the strength and consistency you need for forced-induction applications, street performance, or sustained...09103976- SKU:
- 09103976
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 4.125'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
$322.95 -
Hastings HASTINGS Piston Rings - XL 7003
HASTINGS
$74.95Piston rings are critical to maintaining compression, controlling blow-by, and managing oil consumption—and worn or inferior rings will compromise engine performance and longevity across the board. The Hastings HASTINGS Piston Rings XL 7003 deliver the...DS750610- SKU:
- DS750610
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- UNITS:
- SET
- PRODUCT NAME:
- PISTON RING
- STYLE:
- OEM REPLACEMENT
- BORE SIZE IMPERIAL:
- 3.1875'
- RING MATERIAL:
- MOLY COATED
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- RIDING STYLE:
- STREET
$74.95 -
Hastings HASTINGS Piston Rings - XL 7003020
HASTINGS
$74.95Piston rings are critical to engine performance—they seal combustion pressure, regulate oil consumption, and directly impact horsepower and longevity. Hastings piston rings are engineered to tighter tolerances and use premium materials that resist...DS750612- SKU:
- DS750612
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- RING MATERIAL:
- MOLY COATED
- BORE - OVERSIZE:
- +0,020'
- PRODUCT NAME:
- PISTON RING
- STYLE:
- OEM REPLACEMENT
- BORE SIZE IMPERIAL:
- 3.207'
- RIDING STYLE:
- STREET
- UNITS:
- SET
$74.95 -
Hastings HASTINGS Piston Rings - XL 7003030
HASTINGS
$74.95Piston rings are critical to engine sealing, compression, and oil control—and worn or substandard rings will tank your engine's performance and longevity. Hastings piston rings are engineered to exacting standards with proven materials and designs...DS750613- SKU:
- DS750613
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- BORE SIZE IMPERIAL:
- 3.217'
- RING MATERIAL:
- MOLY COATED
- BORE - OVERSIZE:
- +0,030'
- BORE OVERSIZE - IMPERIAL:
- +0.030'
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
- STYLE:
- OEM REPLACEMENT
$74.95 -
Hastings HASTINGS Piston Rings - Shovelhead 6482
HASTINGS
$56.95Piston rings are critical wear items that directly impact engine compression, blow-by control, and oil consumption—especially in high-performance Shovelhead applications where reliability demands precision. The Hastings 6482 ring set combines proven ring...DS750620- SKU:
- DS750620
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- BORE SIZE IMPERIAL:
- 3.437'
- UNITS:
- SET
- PRODUCT NAME:
- PISTON RING
- STYLE:
- OEM REPLACEMENT
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- RIDING STYLE:
- STREET
- RING MATERIAL:
- CAST
$56.95 -
Hastings HASTINGS Piston Rings - Shovelhead 6482010
HASTINGS
$56.95Piston rings are critical to engine longevity—they seal combustion pressure, regulate oil consumption, and maintain compression integrity. Hastings rings are engineered to exacting tolerances, delivering reliable performance and extended ring life in...DS750621- SKU:
- DS750621
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- UNITS:
- SET
- BORE - OVERSIZE:
- +0,010'
- PRODUCT NAME:
- PISTON RING
- RING MATERIAL:
- CAST
- STYLE:
- OEM REPLACEMENT
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- BORE SIZE IMPERIAL:
- 3.447'
- RIDING STYLE:
- STREET
$56.95
Buying Guide and FAQs
Buying Guide: Factors to Consider When Choosing Harley Bike Engine Rings Only
- Compatibility: Ensure rings match your Harley's engine type (e.g., Big Twin, Twin Cam, Evo, M8) and bore size (standard or oversize +0.005/+0.010/+0.020). Use the vehicle selector for model-specific fits to avoid compression loss or rebuild issues.
- Type of Use: For standard rebuilds, choose moly-faced rings for quick seating; high-performance engines benefit from plasma-moly or low-tension rings for reduced friction and better power in demanding conditions.
- Components and Upgrades: Select ring sets for one piston (top, second, oil rings); upgrade to oversize for bored engines or gapless designs for improved sealing.
- Brand and Quality: Opt for Wiseco or Hastings for high-quality moly-faced rings with precise tolerances. Prioritize materials like cast iron or steel for durability and compatibility with forged pistons.
- Installation and Cost: Rings are part of DIY piston installs with basic tools; prices range from $20 for basic sets to $50 for premium oversize—factor in free shipping over $99 and expert support for value.
Frequently Asked Questions (FAQs)
- What Harley models and engines do these rings support? Rings support Big Twin, Twin Cam, Evo, M8, and models like Road King or Heritage Softail—use the year/make/model filter for bore-specific compatibility.
- How do moly-faced rings improve performance? They provide quick break-in, better sealing, and reduced friction for optimal compression and power in rebuilds.
- What is typically included in a ring set? Sets include top, second, and oil rings for one piston; check details for standard vs. oversize and any clips.
- Are these rings suitable for oversize bores? Yes, available in +0.005 to +0.020 oversizes for bored cylinders in performance upgrades.
- What if a ring set doesn't fit my Harley? Verify bore size and engine type before buying. Our returns policy allows exchanges or refunds if it doesn't match.
- Can I find related engine parts? Yes—explore pistons, gaskets, cylinders/heads, or full kits in the Harley engine category to complement your rings for a complete rebuild.
