Pro Circuit R-304 Silencer – Yamaha YZ125 (2002–2023)
Compact race performance. The legendary Pro Circuit R-304 delivers optimum power gains in a shorter package—designed for closed-course racing where maximum performance is the priority. Hex head screws make repacking quick and easy.
The Pro Circuit R-304 Silencer (SY02125-RE) features compact design for weight savings and performance gains. Recommended for closed-course racing only due to higher sound output. Hex head screws secure the inlet cap for easy removal and quick repacking. The go-to silencer for racers who prioritize maximum power over sound restrictions.
What's Included
- Pro Circuit R-304 Silencer – compact design
- Mounting hardware and springs
Key Features
- Compact Design – optimum performance gains
- Lighter Weight – shorter body saves weight
- Hex Head Screws – easy inlet cap removal for repacking
- Quick Repack Access – maintain performance easily
- Maximum Performance – no sound restrictions compromises
- Closed-Course Racing Only – higher sound output
- Championship-Proven Design – race-winning performance
- Pro Circuit Engineering – decades of championship experience
Fitment
- 2002–2023 Yamaha YZ125
Install Notes
- Direct bolt-on replacement for stock silencer
- Installation time: 30–45 minutes
- Basic hand tools required
- Requires Pro Circuit expansion chamber for optimal performance
- May require jetting adjustment
- Closed-course racing only – check sound regulations
- Easy to repack – remove hex screws, replace packing
📦 Shipping Information
In-Stock Items:
- Most parts ship next business day
- Modquad parts: Monday–Thursday dispatch
Made-to-Order Items:
- Custom swingarms & A-arms: 2–4 weeks
- EVP exhaust systems: 2–4 weeks
- Sneakers: 1–2 weeks
Stock Guarantee: Items marked "In Stock" ship immediately. Made-to-order items are built fresh for you.
Questions? Contact us—we respond within 24 hours.
