Transform your Honda Rancher 420 into a torque monster.

CPP ATV’s 540cc Big Bore Kit is designed for riders who demand more power, better acceleration, and unstoppable pulling strength. Built for serious trail riding, mudding, and heavy hauling, this kit pushes your Rancher beyond the limits of a standard 500cc upgrade.

Key Features:

• Massive Power Increase: Gain up to +8 HP and +8 lb-ft of torque over stock — more than a typical 500cc kit.

• Perfect for Big Tires & Portals: Pull 28″–30″ mud tires without bogging.

• Precision Machining: Professionally bored and sleeved cylinder for a perfect fit.

• Complete Kit: Includes cylinder, oversize piston, rings, wrist pin, circlips, and gaskets.

• Built to Last: Premium materials and tight tolerances for long engine life.

• Tuning Required: Fuel mapping adjustments recommended for peak performance.

Fitment:

• 2007–2013 Honda Rancher TRX 420 (All 4×4 OBS models, foot-shift or ES)

Performance Results (Typical):

• Horsepower: +22–28% over stock

• Torque: +26–35% over stock

• Acceleration: 0–30 mph in ~4.2 seconds (with proper tuning)

Why Choose CPP ATV?

• 30+ years of performance engine building

• In-house machining for perfect fitment

• Tested in real-world riding conditions

Price: $825.00

Order Now and unleash the true potential of your Honda Rancher 420.