CRF450R 99mm Big Bore +3mm Stroker Kit – 2009–2012

🛠️ 99mm Big Bore +3mm Stroker Engine Kit – Honda CRF450R (2009–2012)
SKU: 255048394645

Boost the performance of your CRF450R with this complete top-to-bottom bolt-on engine kit — designed to increase displacement and overall power without any machining. Includes a 99mm big bore cylinder, +3mm Hotrods crankshaft, and all the components needed for a complete engine refresh.

✅ Fits all 2009–2012 Honda CRF450R models
✅ Compatible with pump or race gas
✅ No machining required – true bolt-on setup
✅ All parts are brand new with warranty coverage*

📦 Kit Includes:

• 99mm Aftermarket Big Bore Cylinder

• Forged Piston – Wiseco, CP, or JE (based on availability)

• High-Performance Piston Rings

• Chrome Wristpin + Circlips

• Hotrods +3mm Stroker Crankshaft (with Connecting Rod)

• Main Crankshaft Bearings

• Transmission Bearings

• Water Pump Bearing

• Top & Bottom End Gasket Kit

• Complete Seal Kit with Water Pump Mechanical Seal

• Timing Cam Chain

• Heavy-Duty Clutch Kit

• MaxLock-Style Cylinder Head Stud Kit

🔧 Key Features:

• No case mods or cylinder machining required

• Bolt-on displacement increase = improved torque & power

• Piston is compatible with both pump and race fuel

• All items are OEM-compatible and ready to install

⚠️ Warranty Info:

• All parts must be installed by a qualified mechanic

• Warranty covers manufacturer defects only

• Failures due to improper installation, tuning, or misuse are not covered

• Warranty claims require return of the item for inspection

📦 Shipping Time:
Ships within 5–7 business days. Tracking info provided at shipment.

💬 Customer Support:
Available Monday–Friday, 7 AM to 4 PM PST.
Store chat available 24/7