Harley Piston and Ring Kits
Harley Bike Piston & Ring Kits at JJ Motorsports
Rebuild your Harley's top end with premium piston and ring kits from JJ Motorsports, featuring forged aluminum pistons with high-performance rings for increased compression and durability on Big Twin, Evo, Twin Cam, and Sportster engines. These kits deliver reliable power and long-lasting performance.
Shop KB Performance, Wiseco, and Revolution Performance piston kits for race-proven quality. Explore related categories such as Harley engine for gaskets and rebuilds, or Harley for cams and heads to complete your top-end refresh.
Top Harley Piston & Ring Kits
- KB Performance Super Duty Piston KB660LCA-STD – Forged super-duty piston with rings for 660cc; ideal for high-compression Evo builds.
- Wiseco Piston Kit with Gasket VM Ring VT2719 – Complete Wiseco kit for Twin Cam; includes rings and gaskets for reliable top-end power.
- Revolution Performance LLC Piston Kit RP301-601W – 601cc piston kit with wrist pin; forged for Sportster performance upgrades.
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 Forged Piston Kit - Twin Cam KB660C.005
KB PERFORMANCE
$307.29If you're rebuilding a Twin Cam engine or pushing past stock performance limits, piston quality directly impacts reliability, longevity, and power output. KB Performance's forged 4032 aluminum pistons are engineered for the demands of high-rpm operation,...09103971- SKU:
- 09103971
- Availability:
- Ships Same Business Day
- Weight:
- 2.65 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.875'
- BORE - OVERSIZE:
- +0,005'
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- UNITS:
- KIT
$307.29Qty in Cart: 0Quantity:Price:$307.29Subtotal: -
KB PERFORMANCE Super-Duty Piston KB660LCA.STD
KB PERFORMANCE
$390.86Piston rock and ring flutter cost you horsepower and durability. The KB PERFORMANCE Super-Duty Piston KB660LCA.STD eliminates both through a proprietary skirt coating that self-hones to perfect cylinder clearance at startup, delivering zero piston slap...09105045- SKU:
- 09105045
- Availability:
- Ships Same Business Day
- Weight:
- 2.65 LBS
- UNITS:
- KIT
- BORE SIZE METRIC:
- 98.40 MM
- DISPLACEMENT:
- 103'
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PRODUCT NAME:
- PISTON KIT
- STROKE LENGTH IMPERIAL:
- 4-3/8'
$390.86 -
KB PERFORMANCE Super-Duty Piston KB662LCA.010
KB PERFORMANCE
$390.86Piston rock and ring flutter are silent killers of engine efficiency and longevity. The KB PERFORMANCE Super-Duty Piston KB662LCA.010 eliminates both through an innovative skirt coating that self-hones to perfect clearance on startup, delivering optimal...09105050- SKU:
- 09105050
- Availability:
- Ships Same Business Day
- Weight:
- 2.95 LBS
- BORE SIZE METRIC:
- 104.80 MM
- DISPLACEMENT:
- 117'
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
$390.86 -
On Sale
Wiseco Piston Kit 1984-1998 Harley-Davidson FLHR Road King K1666
WISECO
MSRP: $447.95Now: $348.00Was: $447.95If you're rebuilding a Big Twin engine or planning an overbore, you need pistons engineered to handle sustained performance without compromising reliability. The Wiseco K1666 Kit delivers precision-forged components and complete gasket coverage,...K1666- SKU:
- K1666
- Availability:
- Ships Same Business Day
- Weight:
- 2.63 LBS
- DISPLACEMENT:
- 1345 CC
- RIDING STYLE:
- STREET
- BORE - OVERSIZE:
- +0,010'
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PISTON MATERIAL:
- ALUMINUM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- TYPE:
- TOP END
- BORE SIZE IMPERIAL:
- 3.508'
- UNITS:
- EACH
MSRP: $447.95Now: $348.00Was: $447.95 -
On Sale
Wiseco Piston Kit 1998 Harley-Davidson FLHRI Road King K1667
WISECO
MSRP: $447.95Now: $348.00Was: $447.95Whether you're planning a full top-end rebuild or pushing your Big Twin into overbore territory, the Wiseco K1667 Piston Kit delivers the precision engineering needed to sustain increased compression and power output. This complete solution eliminates...K1667- SKU:
- K1667
- Availability:
- Ships Same Business Day
- Weight:
- 2.45 LBS
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- STREET
- BORE - OVERSIZE:
- +0,020'
- DISPLACEMENT:
- 1353 CC
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PISTON MATERIAL:
- ALUMINUM
- PISTON MATERIAL:
- FORGED
- BORE SIZE IMPERIAL:
- 3.518'
- TYPE:
- TOP END
- UNITS:
- EACH
MSRP: $447.95Now: $348.00Was: $447.95 -
On Sale
Wiseco 1988-2003 Harley-Davidson XLH1200 Sportster 1200 Piston Kit K1687
WISECO
MSRP: $409.95Now: $348.00Was: $409.95A worn or damaged piston compromises compression, power delivery, and engine longevity—making a quality rebuild kit essential for any serious Sportster owner. The Wiseco K1687 delivers OEM-equivalent performance with forged construction that handles...K1687- SKU:
- K1687
- Availability:
- Ships Same Business Day
- Weight:
- 2.38 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 3-13/16'
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- DISPLACEMENT:
- 1200 CC
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- +0,020'
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE SIZE IMPERIAL:
- 3.498'
- UNITS:
- EACH
MSRP: $409.95Now: $348.00Was: $409.95 -
Wiseco Piston Kit with Gasket for 2006 Harley-Davidson FLST Heritage Softail VT2719
WISECO
$716.95A top-end rebuild demands precision components that won't compromise engine integrity or performance. The Wiseco Piston Kit delivers the complete solution—forged pistons, rings, wrist pins, and gaskets—engineered from high-silicon aluminum to handle the...09030791- SKU:
- 09030791
- Availability:
- Ships Same Business Day
- Weight:
- 3.97 LBS
- DISPLACEMENT:
- 1546 CC
- TYPE:
- TOP END
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- PRODUCT NAME:
- REBUILD KIT
- BORE SIZE IMPERIAL:
- 3.875'
- STROKE LENGTH IMPERIAL:
- 4'
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$716.95 -
Wiseco Piston Kit 2022-2023 Harley-Davidson Street Glide ST FLHXST K2801
WISECO
$524.95If you're pushing your M8 Street Glide ST to its limits, factory pistons won't cut it. The Wiseco K2801 kit delivers the compression ratio and protective coatings you need to safely extract more power while keeping your engine reliable under sustained...09031675- SKU:
- 09031675
- Availability:
- Ships Same Business Day
- Weight:
- 2.45 LBS
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- SKIRT COATING:
- ARMORFIT™
- DISPLACEMENT:
- 121'
- PISTON HEAD SHAPE:
- DOMED
- UNITS:
- KIT
- BORE OVERSIZE - IMPERIAL:
- +0.188'
- PISTON MATERIAL:
- ARMORX™
- BORE - OVERSIZE:
- +0,188'
- BORE SIZE IMPERIAL:
- 4.135'
$524.95 -
Wiseco Piston Kit for Harley M8 128ci 2017-2022 K2802
WISECO
$576.95Stock pistons can't handle the demands of a high-performance M8—especially if you're running forced induction or aggressive tuning. The Wiseco K2802 delivers the durability and power gains you need with proprietary coatings and precision engineering...09031676- SKU:
- 09031676
- Availability:
- Ships Same Business Day
- Weight:
- 2.95 LBS
- BORE SIZE IMPERIAL:
- 4.250'
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 128'
- PISTON HEAD SHAPE:
- DOMED
- UNITS:
- KIT
- PISTON MATERIAL:
- ARMORX™
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- ARMORFIT™
$576.95Qty in Cart: 0Quantity:Price:$576.95Subtotal: -
Wiseco Piston Kit 114in 2020-2023 Harley-Davidson FLHXS K2803
WISECO
$576.95If you're building or rebuilding your M8 engine for real power, piston quality directly determines your compression efficiency, combustion velocity, and longevity under high RPM stress. The Wiseco K2803 kit eliminates guesswork with factory-matched...09031677- SKU:
- 09031677
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- SKIRT COATING:
- ARMORFIT™
- STROKE LENGTH IMPERIAL:
- 4-1/2'
- BORE SIZE IMPERIAL:
- 4.016'
- DISPLACEMENT:
- 114'
- PISTON MATERIAL:
- ARMORX™
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- UNITS:
- KIT
$576.95 -
Wiseco Piston Kit 117in 4.075in Bore 11.1:1 Compression Harley-Davidson FLFBS 2018-2023 K2804
WISECO
$576.95If you're running a 117" M8 in your 2018-2023 FLFBS, this Wiseco piston kit delivers the compression ratio and material science your engine demands for reliable power. The ArmorX™ and ArmorFit™ coatings protect against wear while the 11.1:1 compression...09031678- SKU:
- 09031678
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- COMPRESSION RATIO IMPERIAL:
- 11.1:1
- DISPLACEMENT:
- 117'
- PISTON MATERIAL:
- ARMORX™
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- SKIRT COATING:
- ARMORFIT™
- BORE SIZE IMPERIAL:
- 4.075'
- STROKE LENGTH IMPERIAL:
- 4-1/2'
- UNITS:
- KIT
$576.95 -
Wiseco Piston Kit 124in 11:1 Compression for Harley-Davidson Touring Models K2787
WISECO
$524.95If you're running M8 Touring power, factory pistons are holding back what your engine can really deliver. The Wiseco K2787 kit steps up compression to 11:1, unlocking measurable gains in power and torque while the ArmorX™ and ArmorFit™ coatings keep...09031554- SKU:
- 09031554
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- PISTON MATERIAL:
- ARMORX™
- UNITS:
- KIT
- PISTON HEAD SHAPE:
- DISHED
- BORE - OVERSIZE:
- +0,313'
- BORE SIZE IMPERIAL:
- 4.250'
- DISPLACEMENT:
- 2035 CC
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- SKIRT COATING:
- ARMORFIT™
- BORE OVERSIZE - IMPERIAL:
- +0.313'
- STROKE LENGTH IMPERIAL:
- 4-3/8'
$524.95Qty in Cart: 0Quantity:Price:$524.95Subtotal: -
Wiseco Piston Kit for Harley-Davidson 1999-2006 Road King FLHR 4.000" Stroke 9.5:1 Compression K0207PS
WISECO
$322.95If you're running a 1999-2006 Road King and want to unlock serious power gains without compromising reliability, this Wiseco piston kit is the foundation you need. The forged construction and optimized valve pockets allow larger displacement builds and...09031558- SKU:
- 09031558
- Availability:
- Ships Same Business Day
- Weight:
- 2.45 LBS
- BORE SIZE IMPERIAL:
- 3.875'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4'
- STYLE:
- TRACKER™ SERIES
- BORE - OVERSIZE:
- STANDARD
- DISPLACEMENT:
- 1546 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 9.5:1
- PISTON HEAD SHAPE:
- DOMED
- PISTON MATERIAL:
- FORGED
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- KIT
$322.95 -
Wiseco Piston Kit 3.875 in. Bore 9:1 CR for Harley-Davidson Twin Cam 103 2010-2017 K2788
WISECO
$576.95Stock pistons in your Twin Cam 103 are a limiting factor when you're serious about performance and reliability. Wiseco's forged construction and ArmorGlide™ coating reduce friction and thermal stress, translating directly to more consistent power...09101996- SKU:
- 09101996
- Availability:
- Ships Same Business Day
- Weight:
- 2.34 LBS
- BORE - OVERSIZE:
- 0,125'
- PISTON HEAD SHAPE:
- REVERSE
- MODEL:
- VM SERIES
- SKIRT COATING:
- ARMORFIT™
- BORE OVERSIZE - IMPERIAL:
- 0.125'
- BORE SIZE IMPERIAL:
- 3.875'
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- DISPLACEMENT:
- 1691 CC
- PISTON MATERIAL:
- ALUMINUM
- UNITS:
- KIT
$576.95 -
Wiseco Piston Kit 3.875 in. Bore 10.5:1 Compression Ratio Harley-Davidson Twin Cam 103 2011-2016 K2792
WISECO
$576.95If you're pushing your Twin Cam 103 hard—whether on the dyno, the track, or the street—stock pistons will eventually let you down. The Wiseco K2792 kit gives you forged pistons with ArmorGlide™ skirts and ArmorPlating ring grooves, engineered to handle...09101999- SKU:
- 09101999
- Availability:
- Ships Same Business Day
- Weight:
- 2.45 LBS
- BORE - OVERSIZE:
- 0,125'
- BORE OVERSIZE - IMPERIAL:
- 0.125'
- PISTON MATERIAL:
- ALUMINUM
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.875'
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- DISPLACEMENT:
- 124'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- MODEL:
- VM SERIES
- PISTON HEAD SHAPE:
- POSITIVE
- SKIRT COATING:
- ARMORFIT™
- STROKE LENGTH IMPERIAL:
- 4-3/8'
$576.95 -
Wiseco Piston Kit 103 Cubic Inch 2007-2017 K2793
WISECO
$576.95If you're building or rebuilding a high-displacement Twin Cam engine, piston selection directly impacts reliability, power delivery, and longevity under sustained load. The Wiseco K2793 combines forged strength with advanced surface treatments designed...09102001- SKU:
- 09102001
- Availability:
- Ships Same Business Day
- Weight:
- 2.10 LBS
- BORE - OVERSIZE:
- 0,125'
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PISTON MATERIAL:
- ALUMINUM
- BORE OVERSIZE - IMPERIAL:
- 0.125'
- MODEL:
- VM SERIES
- DISPLACEMENT:
- 103'
- PISTON HEAD SHAPE:
- POSITIVE
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- SKIRT COATING:
- ARMORFIT™
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- BORE SIZE IMPERIAL:
- 3.875'
- UNITS:
- KIT
$576.95 -
Wiseco Piston Kit 1984-1999 Harley-Davidson Big Twin 1340cc K1675
WISECO
$447.95A top-end rebuild demands precision components that can handle the stress of high-compression combustion cycle after cycle. Wiseco's high-silicon aluminum alloy pistons are engineered to resist thermal fatigue and maintain tight tolerances, keeping your...K1675- SKU:
- K1675
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- BORE - OVERSIZE:
- +0,005'
- BORE SIZE IMPERIAL:
- 3.503'
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- TYPE:
- TOP END
- UNITS:
- EACH
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- DISPLACEMENT:
- 1342 CC
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- REBUILD KIT
$447.95 -
REVOLUTION PERFORMANCE, LLC Piston Kit RP301-104W
REVOLUTION PERFORMANCE, LLC
$495.95When you're pushing your engine to the limit, stock pistons become your weakest link. The Revolution Performance RP301-104W piston kit delivers the strength and thermal stability required for sustained high-RPM operation, engineered with custom-forged...09106370- SKU:
- 09106370
- Availability:
- Ships Same Business Day
- Weight:
- 3.30 LBS
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4'
- PISTON HEAD SHAPE:
- DOMED
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.937'
- DISPLACEMENT:
- 98'
- COMPRESSION RATIO IMPERIAL:
- 10.3:1
$495.95 -
REVOLUTION PERFORMANCE, LLC Piston Kit RP301-105W
REVOLUTION PERFORMANCE, LLC
$495.95High-performance pistons demand precision engineering and material science to withstand extreme combustion pressures and thermal cycling. The REVOLUTION PERFORMANCE RP301-105W piston kit delivers custom-forged construction with a skirt coating and offset...09106371- SKU:
- 09106371
- Availability:
- Ships Same Business Day
- Weight:
- 3.15 LBS
- BORE SIZE IMPERIAL:
- 3.937'
- RIDING STYLE:
- STREET
- COMPRESSION RATIO IMPERIAL:
- 9.3:1
- PISTON HEAD SHAPE:
- FLAT TOP
- STROKE LENGTH IMPERIAL:
- 4'
- PRODUCT NAME:
- PISTON KIT
- DISPLACEMENT:
- 98'
- UNITS:
- KIT
$495.95 -
Wiseco Piston Kit 95ci 9.5:1 Compression for Harley-Davidson FLHRCI Road King Classic 1999-2006 K0207P1
WISECO
$322.95When you're pushing your Road King Classic to its limits, factory pistons can't handle the demands of aggressive cam profiles and larger valve configurations. The Wiseco K0207P1 delivers the durability and precision engineering you need to safely extract...09031559- SKU:
- 09031559
- Availability:
- Ships Same Business Day
- Weight:
- 2.45 LBS
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- BORE SIZE IMPERIAL:
- 3.885'
- DISPLACEMENT:
- 1546 CC
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- COMPRESSION RATIO IMPERIAL:
- 9.5:1
- PISTON HEAD SHAPE:
- DOMED
- BORE - OVERSIZE:
- +0,010'
- SKIRT COATING:
- ARMORGLIDE®
- STROKE LENGTH IMPERIAL:
- 4'
- STYLE:
- TRACKER™ SERIES
- UNITS:
- KIT
$322.95Qty in Cart: 0Quantity:Price:$322.95Subtotal:
Buying Guide and FAQs
Buying Guide: Factors to Consider When Choosing Harley Bike Piston and Ring Kits
- Compatibility: Match kits to your Harley's engine type (e.g., Big Twin, Twin Cam, Sportster, M8) and model (e.g., FLHR Road King 1984-1998, XLH1200 Sportster 1988-2003, FLST Heritage Softail 2006). Use the vehicle selector for year-specific fits, including bore oversizes (+0.005" to +0.188") and displacements (1200cc-1353cc) to ensure precise rebuilds without modifications.
- Type of Use: For high-performance or street builds, select forged kits with high compression (10.0:1-11.1:1) for power gains; standard rebuilds benefit from super-duty options with skirt coatings for quiet operation and durability in touring or daily riding.
- Components and Upgrades: Choose kits including pistons, rings, pins, clips, and sometimes gaskets; upgrade to ArmorGlide/ArmorFit coatings for reduced friction and zero clearance install. Focus on high-silicon aluminum alloys for strength and reliability.
- Brand and Quality: Opt for Wiseco for forged aluminum kits with advanced coatings and high compression, or KB Performance for super-duty pistons with skirt technology. Prioritize OEM-matching quality for long-lasting performance and precise fits.
- Installation and Cost: Kits are designed for DIY or professional top-end rebuilds with basic tools; prices range from $307 for standard kits to $659 for premium options with gaskets—factor in expert support and free shipping over $99 for value.
Frequently Asked Questions (FAQs)
- What Harley models and engines do these piston and ring kits support? Kits are compatible with Big Twin (e.g., Road King 1984-1998), Sportster (e.g., XLH1200 1988-2003), Twin Cam (e.g., Heritage Softail 2006), and M8 (e.g., Street Glide ST 2022-2023)—use the year/make/model filter for exact matches.
- How do forged pistons improve engine performance? Forged aluminum pistons (e.g., Wiseco) with high-silicon alloys and coatings reduce friction, enhance strength, and support higher compression for better power and efficiency in rebuilds.
- What is typically included in a kit? Most kits include pistons, rings, pins, spiral-lock clips, and sometimes gaskets (e.g., Wiseco VT2719); check details for oversize options and top-end components.
- Are these kits suitable for oversize bores? Yes, available in standard to +0.188" oversizes for bored engines, with compression ratios from 9.0:1 to 11.1:1 for custom builds.
- What if a kit doesn't fit my Harley? Verify bore size, displacement, and model before buying. Our returns policy allows exchanges or refunds if it doesn't match.
- Can I find related engine parts? Yes—explore gaskets, cylinders/heads, bearings/seals, or full rebuild kits in the Harley engine category to complete your top-end refresh.
