• Boyesen Power Reeds - Yamaha RD250/350/400 and RD250/350LC Boyesen's patented dual-stage design incorporates a specially shaped top reed and ported bottom reed. The top reed is lightweight and resilient for crisp throttle response at partial throttle or low RPM. The stiffer, bottom reed is ported to provide maximum flow and horsepower at higher RPM. More Airflow, More Air Velocity, More overall Power. Includes 2 sets of reeds.
  • Carbon Tech Reeds - Yamaha RD250/350/400. Carbon Fiber reeds by Carbon Tech. The latest in high tech reed technology. Available in low tension for stock to slightly modified engines and high tension for highly modified race engines. We recommend LT type for stock and street performance RD's with stock exhaust or expansion chambers with modified intake. HT type for high output / high revving racing applications. Note: Order 1 set for 1 motor, this is enough to do both cylinders. Sample image. Choose Reeds and click add to cart. 
  • TDR Hyper Tension Reeds - Yamaha RD250/350/400. By Tony Doukas Racing. The tuner and racer's choice in reed technology. Custom design by TDR to give maximum performance, flow and long life, excellent high rev performance. Highest quality fiber reeds available, each kit contains 2 sets of reeds, enough reeds to do 2 carbs/1bike. Note: One package of reeds is enough to do one bike, two cylinders. Available in 3 stages: Stage 1 (yz125 style) - Stock to mildly modified engines. These double petal reeds are .018" thick and offer excellent throttle response and added performance. These reeds are based on the Yamaha YZ125 reeds but resized to fit the RD reed cages, no cutting or mods required. Stage 2 - Stock or slightly modified engines (chambers/filters/no porting). These double petal reeds are .020" thick and offer excellent throttle response and added performance. Slightly stiffer than our stage 1 reeds. Stage 3 - For highly modified engines or racing applications. These Single petal reeds are .020" thick and offer excellent throttle response and added performance. Much stiffer than our stage 1 or 2 reeds.
  • Yamaha YZ125 Reeds for Yamaha RD250/350/400 (set of 4). We carry these reeds due to numerous customer requests. These are original Yamaha reeds for the YZ125 but can be used in the Yamaha RD250/350/400. Note: These reeds must be cut to size to fit the RD reed cages. Sold as a set of 4, enough to do 2 reed cages.