CPP Big Bore Kit for Honda 420/500/520 Engines Take your Honda ATV to the next level with our Big Bore Kit, designed for models using the 420, 500, and 520 engines. This kit includes a forged piston and an OEM cylinder precision-machined to fit all cases from 2007 to current models. ⚙️ Key Details: Fits 2007 Rancher, Foreman, and Rubicon models Note: 2007-2008 Rancher 420S models will require a 2009 or newer style head Fuel tuning is required for proper performance and reliability For maximum power gains, we recommend pairing this kit with our Performance Camshaft �� Unlock more torque and horsepower with this high-quality upgrade, perfect for riders who demand the most from their Honda ATV.
