Pro Circuit R-304 Shorty Silencer 1161985 — KTM 85 SX / Husqvarna TC85 / Gas Gas MC 85 2018-2024

Product Description

The Pro Circuit R-304 Shorty Silencer is the go-to choice for competitive racers looking to sharpen their throttle response and optimize power delivery. Designed specifically for the high-revving 85cc engine, the R-304 Shorty is the most popular silencer in the Pro Circuit lineup, offering a lightweight, compact design that puts power exactly where 85cc riders need it most.

Crafted from high-quality 6061-T6 brushed aluminum, this silencer is as durable as it is lightweight. It features double-walled mounting brackets for increased strength and high-strength aluminum rivets combined with steel Allen-head screws, making it simple to disassemble for routine repacking. Filled with Pro Circuit’s exclusive E-glass pillow packing, this silencer provides excellent sound damping without sacrificing top-end performance.

Top Features: Pro Circuit R-304 Shorty Silencer

• Lightweight 6061-T6 brushed aluminum canister construction
• Designed for improved bottom-to-mid range throttle response
• Features high-strength hardware for easy disassembly and repacking
• Exclusive E-glass pillow packing ensures long-lasting performance
• 100% Made in the USA for premium quality assurance

Please review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.

Fitment List

Frequently Asked Questions

Q: Why choose a "Shorty" silencer over a standard length silencer?
A: The "Shorty" design is engineered specifically for competitive racing. By reducing the overall length, it improves throttle response and bottom-end acceleration, which is critical for clearing jumps out of tight corners on an 85cc bike.

Q: How often should I repack my R-304?
A: Because the R-304 is a performance-oriented silencer, the packing will break down faster than a stock unit. We recommend repacking every 15-20 hours of riding to ensure the bike maintains its performance and does not become excessively loud.

Expert Pro-Tip: When repacking your silencer, don't just shove the packing in—wrap it tightly around the perforated core. If the packing is loose, it will vibrate and disintegrate in a matter of hours. A tightly wrapped, dense packing job is the secret to both a deeper, factory sound and consistent, crisp engine response.

Recommended Pairings:
o KTM 85 SX Performance Parts & Upgrades
o Husqvarna TC85 Performance Parts
o Gas Gas MC 85 Performance Parts

At Moto-House MX, we carry the best brands in motocross and off-road performance. Our team has over 40 years of experience helping riders get more out of their bikes. Every order ships fast from our Central Florida location.

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