Pro Circuit R-304 Shorty Silencer SK98080-R — Kawasaki KX85 / KX112 & Suzuki RM100 1998-2025

Pro Circuit R-304 Shorty Silencer SK98080-R — Kawasaki KX85 / KX112 & Suzuki RM100 1998-2025

Product Description

Bring out the quintessential crisp, raw snap of your two-stroke machine with the iconic Pro Circuit R-304 Shorty Silencer. Widely recognized as the ultimate slip-on upgrade for mini-motocross racers, the Shorty design features a shortened canister length that optimizes exhaust gas backpressure. This structural profile delivers instant, aggressive bottom-end throttle response and massive mid-range acceleration, helping young racers pull holeshots and clear obstacles straight out of tight corners.

Constructed out of lightweight 6061-T6 aerospace aluminum with a clean, brushed exterior finish, this ultra-light canister significantly reduces rear chassis weight over stock mufflers. The internal core assembly utilizes exclusive E-glass pillow packing to control sound waves while maximizing internal exhaust velocity. Completed with high-strength stainless steel intake pipes, double-walled mounting brackets, and structural Allen-head screws, maintenance and repacking are exceptionally straightforward.

Top Features: Pro Circuit R-304 Shorty Silencer

• Shorty Canister Profile: Compressed body layout optimizes power delivery down low, perfect for immediate acceleration out of corners.
• Lightweight Materials: Premium 6061-T6 brushed aluminum canister combined with a rugged stainless steel inlet pipe and end cap for maximum durability.
• E-Glass Pillow Packing: Proprietary packing configuration maximizes structural longevity and guarantees superior dampening efficiency.
• Simple Disassembly: High-grade steel Allen-head fasteners enable rapid packing replacement without drilling out structural rivets.

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

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Sub-Model
2022-2025	Kawasaki	KX112
2001-2025	Kawasaki	KX85
1998-2009, 2011-2021	Kawasaki	KX100
2010	Kawasaki	KX100
2003-2005	Suzuki	RM100
1998-2018	Kawasaki	KX80

Frequently Asked Questions

Q: What is the sound performance profile of the R-304 Shorty compared to the standard 304 silencer?
A: The R-304 Shorty features a shorter canister body, which results in a slightly louder, crisp exhaust note with a significant emphasis on immediate low-to-mid range power generation. The standard 304 silencer offers a marginally quieter footprint and spreads performance more evenly across the top end.

Q: How often do I need to repack the internal E-glass pillow packing in this shorty model?
A: For two-stroke track machinery running at sustained high RPMs, Pro Circuit recommends servicing the silencer packing every 10 to 15 operating hours. Swapping worn packing elements restores backpressure balance, preserves optimal engine performance, and shields the aluminum sleeve from high thermal wear.

Expert Pro-Tip: When seating your fresh silencer to your expansion chamber pipe joint, avoid utilizing generic hardware store silicone. Grab high-temperature RTV silicone sealant to establish an air-tight, absolute seal around the piping sleeve interface. A leaking exhaust collar allows raw ambient oxygen to mix with hot exhaust waves, resulting in erratic jetting performance, messy oil splatter, and noticeable throttle response delays.

Recommended Pairings:
o Kawasaki KX85 / KX100 / KX112 Performance Parts
o Pro Circuit 2-Stroke Exhaust Collection
o High-Temp Seals & Chemicals

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.

Moto-House MX – Choice of Champions – Clermont / Montverde, FL. Central Florida's premier powersports source with lightning-fast worldwide shipping.