YXZ1000R / Wildcat XX +2mm Big Bore Piston Kit – 9.5:1

SKU 284922171947

🔥 +2mm Big Bore Piston Kit – Yamaha YXZ1000R / Arctic Cat Wildcat XX
Built for Power. Ready for Pump or Race Fuel. No Case Mods Needed.

Unleash serious power with this complete +2mm big bore piston kit, engineered for the Yamaha YXZ1000R and Arctic Cat Wildcat XX. This drop-in top-end performance package includes premium forged pistons, a titanium head stud kit, and all the top-end components needed for a reliable high-compression setup — no machining to the cases or head required.

✅ Fits all years and models of Yamaha YXZ1000R & Wildcat XX
✅ +2mm bore — cylinder re-plating required (service available)
✅ No internal engine modifications needed
✅ Fuel controller required (available separately)

📦 What’s Included:

• ✔️ Wiseco +2mm Forged Pistons (9.5:1 Compression)

• ✔️ Nitrite-Coated Piston Rings

• ✔️ Chrome Wristpins + Circlips

• ✔️ Big Bore Head Gasket (Cometic or OEM)

• ✔️ Valve Stem Seals

• ✔️ Maxlok Titanium Head Stud Kit – Lifetime Warranty*

• ✔️ NGK Spark Plugs

• ✔️ High-Strength Timing Chain

⚙️ Key Features:

• 🔧 Bolt-On Big Bore Upgrade — No crank or case work needed

• 🛠️ Machining Required: Cylinder must be bored and re-plated (we offer this service; allow 4–6 weeks)

• 💥 Forged Pistons Built for Boost & Abuse

• 🔩 Titanium Studs = Long-Term Reliability + Sealing Strength

• ⛽ Runs on Pump or Race Gas

• 📦 Everything Brand New in Original Packaging

📌 Fitment Compatibility:

🕒 Machining Note:

⚠️ Cylinder boring and Nikasil re-plating are required.
We offer this service with a 4–6 week turnaround. Contact us for details.

🛡️ Warranty Notice:

• ✔️ 1-Year Warranty on parts against manufacturer defects

• ⚠️ Professional installation is required

• 🚫 No warranty coverage for improper installation, tuning, or failure to use a fuel controller

• 🔍 All claims require inspection of returned parts

📦 Shipping Time:
Parts ship in 5-7 business days. Cylinder re-plating (if purchased) takes 4–6 weeks.

💬 Customer Support:
Available Monday–Friday, 7 AM to 4 PM PST
Live store chat support available 24/7