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Engines and Components› Pistons and Piston Rings
Wiseco
Wiseco 4 Stroke Forged Series Piston Kit, 85.00 MM Bore, 11:1 CR
SKU: W00C PK1036
Advanced — 4+ hours
Overview
Each kit contains essential components for rebuilding or overboring your top end, ensuring a comprehensive solution. Please note that cylinder sleeves are sold separately, and proper bore sizing is crucial for ordering the correct standard or oversized piston.
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Part #: PK1036
The Wiseco team has remained at the forefront of powersports performance through every era and evolution, including the development of high-performance 4-strokes. Today, Wiseco's forged 4-stroke pistons are designed for each specific engine application and built to the tightest tolerances for the ultimate combination of performance and strength. Proven at every level of riding, Wiseco 4-stroke pistons are ready to deliver the power and reliability you're looking for.
Features:
- Engineered, forged, and machined in the USA in Mentor, OH
- Designed and built for each specific 4-stroke powersports engine
- Improved tensile strength of forged material optimizes strength and service life
- Dedicated forgings allow for optimized strength-to-weight ratio
- Includes high-quality piston rings, wrist pin(s), and circlips
Wiseco 4 Stroke Forged Series Piston Kit, 85.00 mm Bore, 11:1 CR
This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
Vehicle Symptoms
- Loss of compression and power
- Excessive oil consumption and blue smoke
- Engine knocking or pinging under load
- Hard starting or misfiring
- Rough idle and poor throttle response
Relevant Conversations
- TRX400EX loss of compression symptoms
- Wiseco top end rebuild kit Honda XR400R
- ATV burning oil after rebuild help
- 85mm piston kit for Honda 400EX
- Engine knocking at high RPM 400EX
- PK1036 vs OEM piston quality
- Best top end rebuild kit for TRX400X
- How to rebuild TRX400EX top end step by step
- Wiseco forged piston reviews forum
- Honda 400EX blue smoke from exhaust fix
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
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Specifications
| Brand | Wiseco |
| Part Number | W00C PK1036 |
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Returns & Fitment
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.
Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.
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