Honda CR500R Parts & Accessories

Honda CR500R Parts & Accessories

Two-stroke motocross machines demand regular top-end service and performance-oriented parts that can handle the mechanical stress of hard riding. The Honda CR500R pairs a 491cc liquid-cooled two-stroke single with a lightweight chromoly frame designed for open-class motocross and high-performance trail use. The CR500R is one of the most powerful production two-stroke motocross bikes ever built, produced from 1984 through 2001. Keeping a CR500 running well means sourcing quality pistons, reed valves, expansion chambers, and drivetrain components from brands that understand the demands of extreme two-stroke performance engines.

Popular Upgrades

The most frequently purchased parts for the CR two-stroke lineup include Wiseco forged pistons and ring kits, Boyesen reed valves and reed cages, FMF and Pro Circuit expansion chambers, FMF silencers, EBC brake pads, DID chains and Renthal sprockets, and graphics kits from factory-style suppliers. Boyesen reeds deliver a sharper, more responsive powerband than stock reeds on worn engines. DID chains and Renthal aluminum sprockets represent the performance-standard drivetrain combination on competitive machines.

Performance and Handling

Top-end service intervals on two-stroke motocross engines are measured in hours, not miles. Piston and ring replacement every 15 to 25 hours of hard riding prevents the catastrophic engine damage that results from an oversized ring gap. The power valve mechanism must be cleaned and inspected at the same interval to maintain the smooth powerband that Honda designed into these engines. Suspension setup using revalved forks and shock units matched to rider weight makes the biggest real-world lap time difference on any motocross machine.

What piston fits a Honda CR500R?

Wiseco forged pistons for the CR500R are available in standard bore and oversize options. The CR500 generates significant cylinder pressure, making a high-quality forged piston essential. Each Wiseco kit includes rings, wrist pin, and circlips sized for the correct bore specification.

What exhaust fits a Honda CR500R?

FMF Gnarly pipes and aftermarket silencers are the primary expansion chamber options for the CR500R. Given the engine's output, stainless or titanium expansion chambers are preferred for durability. The stock pipe design is functional but aftermarket options improve power delivery across a wider rpm band.

Why These Parts Fit Right

All parts are listed with the specific CR model year and bore specification required for accurate fitment. The CR500R was produced from 1984 through 2001 with regular design updates, and piston dimensions and exhaust port angles changed across the production run. Each listing confirms compatibility before purchase to prevent ordering errors.

CR riders can also explore the exhaust systems collection for a full selection of two-stroke pipes and silencers, the suspension catalog for fork and shock upgrades, and the Armored Friction brake catalog for pad and shoe sets.