Dirt Bike Piston and Ring Kits
Dirt Bike Piston & Ring Kits for Yamaha YZ85, WR250 & YZ250 at JJ Motorsports
Rebuild your dirt bike's top end for maximum power and reliability with premium piston and ring kits from JJ Motorsports, forged from high-strength aluminum for superior heat resistance, lightweight performance, and precise fit in motocross, enduro, and trail riding. Our selection includes complete kits with pistons, high-performance rings, wrist pins, circlips, top-end bearings, and gaskets designed for enhanced combustion efficiency, reduced blow-by, and longer engine life under high-RPM abuse. Compatible with popular models like Yamaha YZ85 (2002-2018), WR250, and YZ250, these Wiseco-engineered components feature CNC-machined crowns for optimal cam shape, ArmorGlide skirt coatings for low friction, and 4032 alloy construction for durability in dusty, aggressive conditions. Whether you're refreshing a youth 85cc 2-stroke or upgrading a 250cc big bore, these kits ensure crisp throttle response, better sealing, and race-ready power without the need for custom boring—perfect for DIY rebuilds or pro-level maintenance.
Shop trusted brands like Wiseco for race-proven quality. Explore related categories such as dirt bike engine for cylinders and valves or dirt bike air and fuel for carburetors and jets.
Top Dirt Bike Piston & Ring Kits
- Wiseco YZ85 2002-2018 Piston Kit with Gaskets PK1202 – 47.50mm forged aluminum piston kit for Yamaha YZ85 2-stroke; includes rings, wrist pin, circlips, bearing, and gaskets for enhanced combustion and throttle response.
- Wiseco 68.00mm Piston Kit with Gaskets Yamaha WR/YZ 250 PK1563 – Complete big bore kit for Yamaha WR250/YZ250; features forged piston, rings, wrist pin, circlips, and top-end gaskets for superior power and sealing.
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!
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- Qty in Cart
- Quantity
- Price
- Subtotal
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MOOSE RACING Piston Kit - 97.00 mm - Can-Am MP9014
MOOSE RACING
$125.95Piston Kit - 97.00 mm - Can-Am Feature X-style forgings for ultimate strength, minimizing friction, durability, power, and weight reduction, Full radius dome designs maximize quench while eliminating hot spots that promote detonation, Internal bracing...09106478- SKU:
- 09106478
- Availability:
- Ships Same Business Day
- Weight:
- 1.26 LBS
$125.95Qty in Cart: 0Quantity:Price:$125.95Subtotal: -
MOOSE RACING Piston Kit - 96.00 mm - Honda MP2057
MOOSE RACING
$125.95Piston Kit - 96.00 mm - Honda Feature X-style forgings for ultimate strength, minimizing friction, durability, power, and weight reduction, Full radius dome designs maximize quench while eliminating hot spots that promote detonation, Internal bracing...09106479- SKU:
- 09106479
- Availability:
- Ships Same Business Day
- Weight:
- 1.11 LBS
$125.95 -
MOOSE RACING Piston Kit - 95.00 mm - Yamaha MPX1026
MOOSE RACING
$386.95Piston Kit - 95.00 mm - Yamaha Feature fully boxed-style forging for ultimate strength, minimizing friction, durability, power, and weight reduction, Full radius dome designs maximize quench while eliminating hot spots that promote detonation, Internal...09106488- SKU:
- 09106488
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
$386.95 -
MOOSE RACING Piston Kit - 79.00 mm - Honda MPX2082
MOOSE RACING
$147.95Piston Kit - 79.00 mm - MPX2082 X-style forgings for enhanced strength and performance. Minimizes friction, ensuring durability and power efficiency. Full radius dome designs optimize quench and reduce detonation risks. Internal bracing...09106518- SKU:
- 09106518
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
$147.95 -
MOOSE RACING Piston Kit - 79.00 mm - Honda MPX2083A-P
MOOSE RACING
$516.95Piston Kit - 79.00 mm - Honda Pro Race Piston increases the durability by reducing the stresses in the pin bore area and allowing the pin to flex, Full radius dome designs maximize quench while eliminating hot spots that promote detonation, Internal...09106519- SKU:
- 09106519
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
$516.95 -
MOOSE RACING Piston Kit - 96.00 mm - Honda MP2058
MOOSE RACING
$125.95Piston Kit - 96.00 mm - Honda Feature X-style forgings for ultimate strength, minimizing friction, durability, power, and weight reduction, Full radius dome designs maximize quench while eliminating hot spots that promote detonation, Internal bracing...09106480- SKU:
- 09106480
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
$125.95 -
MOOSE RACING Piston Kit - 97.00 mm - Yamaha MPX1068
MOOSE RACING
$386.95Piston Kit - 97.00 mm - Yamaha Feature fully boxed-style forging for ultimate strength, minimizing friction, durability, power, and weight reduction, Full radius dome designs maximize quench while eliminating hot spots that promote detonation, Internal...09106483- SKU:
- 09106483
- Availability:
- Ships Same Business Day
- Weight:
- 0.96 LBS
$386.95 -
MOOSE RACING Piston Kit - 96.00 mm - Honda MPX2059
MOOSE RACING
$386.95Piston Kit - 96.00 mm - MPX2059 Engineered with fully boxed-style forging for superior strength and reduced friction. Features full radius dome designs to maximize quench and eliminate hot spots, preventing detonation. Internal bracing...09106487- SKU:
- 09106487
- Availability:
- Ships Same Business Day
- Weight:
- 1.11 LBS
$386.95 -
MOOSE RACING Piston Kit - 77.00 mm - Suzuki MP3031C
MOOSE RACING
$326.95Piston Kit - 77.00 mm - Suzuki Feature X-style forgings for ultimate strength, minimizing friction, durability, power, and weight reduction, Full radius dome designs maximize quench while eliminating hot spots that promote detonation, Internal bracing...09106484- SKU:
- 09106484
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
$326.95 -
MOOSE RACING Piston Kit - 42.95 mm - Cobra 65 MSE24106AB
MOOSE RACING
$25.95Piston Kit - 42.95 mm - Cobra 65 Kit includes piston, ring set, wrist pin and circlips, Gravity cast aluminum alloy with 18% silicon to increase resistance to wear and decrease thermal distortion , Coated skirt eases break in, decreases wear and aids in...09106548- SKU:
- 09106548
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$25.95 -
MOOSE RACING Piston Kit - 57.95 mm - TXC-W 150 MSE24519B
MOOSE RACING
$206.95Piston Kit - 57.95 mm - TXC-W 150 Kit includes piston, ring set, wrist pin and circlips, Gravity cast aluminum alloy with 18% silicon to increase resistance to wear and decrease thermal distortion , Coated skirt eases break in, decreases wear and aids in...09106549- SKU:
- 09106549
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
$206.95 -
MOOSE RACING Piston Kit - 72.96 mm - Xtrainer 300 MSE24569B
MOOSE RACING
$218.95Piston Kit - 72.96 mm - Xtrainer 300 Kit includes piston, ring set, wrist pin and circlips, Gravity cast aluminum alloy with 18% silicon to increase resistance to wear and decrease thermal distortion , Coated skirt eases break in, decreases wear and aids...09106545- SKU:
- 09106545
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
$218.95Qty in Cart: 0Quantity:Price:$218.95Subtotal: -
MOOSE RACING Piston Kit - 44.95 mm - Cobra 65 MSE24107AB
MOOSE RACING
$40.95Piston Kit - 44.95 mm - Cobra 65 Kit includes piston, ring set, wrist pin and circlips, Gravity cast aluminum alloy with 18% silicon to increase resistance to wear and decrease thermal distortion , Coated skirt eases break in, decreases wear and aids in...09106547- SKU:
- 09106547
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$40.95 -
MOOSE RACING Piston Kit - 53.95 mm - YZ 125 MSE24570B
MOOSE RACING
$147.95Piston Kit - 53.95 mm - YZ 125 Kit includes piston, ring set, wrist pin and circlips, Gravity cast aluminum alloy with 18% silicon to increase resistance to wear and decrease thermal distortion , Coated skirt eases break in, decreases wear and aids in...09106550- SKU:
- 09106550
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
$147.95 -
MOOSE RACING Piston Kit - 38.95 mm - Cobra 50 MSE24105B
MOOSE RACING
$38.95Piston Kit - 38.95 mm - Cobra 50 Kit includes piston, ring set, wrist pin and circlips, Gravity cast aluminum alloy with 18% silicon to increase resistance to wear and decrease thermal distortion , Coated skirt eases break in, decreases wear and aids in...09106546- SKU:
- 09106546
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
$38.95 -
Wossner 55 mm Piston Kit for Yamaha YZ125 2022-2025 8321D100
WOSSNER
$132.00Upgrade your Yamaha's performance with our high-quality 54.95 mm Piston Kit, designed for optimal efficiency and durability. Crafted from aerospace-grade aluminum alloy, this piston kit ensures reduced friction and noise, enhancing your riding experience...09106617- SKU:
- 09106617
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
$132.00 -
Wossner Piston Kit 55.95 mm Yamaha YZ125 2022-2025 8321D200
WOSSNER
$152.00Enhance your Yamaha's performance with our premium Piston Kit, designed for superior efficiency and durability. Crafted from aerospace-grade aluminum alloy, this piston kit ensures optimal power delivery while minimizing friction and noise. Experience a...09106618- SKU:
- 09106618
- Availability:
- Ships Same Business Day
- Weight:
- 0.42 LBS
$152.00 -
Wossner Piston Kit 57.95mm Yamaha YZ125 2022-2023 8321D400
WOSSNER
$152.00Enhance your Yamaha's performance with our high-quality Piston Kit, designed for precision and durability. Crafted from aerospace-grade aluminum alloy, this kit ensures optimal power delivery while minimizing friction and noise. Experience improved...09106619- SKU:
- 09106619
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
$152.00 -
Wossner Piston Kit 71.94mm KTM 300 EXC 2006-2024 8327DA
WOSSNER
$192.00Upgrade your motorcycle's performance with our high-quality Piston Kit, designed specifically for KTM, Husqvarna, and Gas Gas models. Engineered for optimal efficiency, this piston kit enhances power delivery while minimizing friction for a quieter,...09106620- SKU:
- 09106620
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
$192.00 -
Wossner Piston Kit 71.95mm KTM 300 EXC 2023 8327DB
WOSSNER
$192.00Experience enhanced performance and durability with our high-quality 71.95 mm Piston Kit, designed specifically for KTM, Husqvarna, and Gas Gas motorcycles. Each piston is engineered with a permanent skirt coating to minimize friction and reduce piston...09106621- SKU:
- 09106621
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
$192.00
