Pro Circuit 304 Silencer – Yamaha YZ125 (2002–2023)
The standard for 2-stroke performance. The Pro Circuit 304 delivers championship-proven power with reduced noise output—perfect for riders who need race performance with slightly lower sound levels. Brushed aluminum looks as good as it performs.
The Pro Circuit 304 Silencer (SY02125-SE) features a slightly longer body compared to the R-304 for reduced noise output while maintaining excellent performance. Brushed aluminum body with stainless steel inlet tube and end cap delivers durability and professional appearance. Recommended for most two-stroke applications where sound regulations are a concern.
What's Included
- Pro Circuit 304 Silencer – brushed aluminum
- Mounting hardware and springs
Key Features
- Slightly Longer Body – reduced noise vs R-304
- Brushed Aluminum Body – premium appearance
- Stainless Steel Inlet Tube – corrosion-resistant
- Stainless Steel End Cap – durable construction
- Championship Performance – race-proven design
- Reduced Sound Output – better for noise regulations
- Recommended for Most Applications – versatile choice
- 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
- Check local sound regulations before installation
📦 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.
