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IMPROVED INTAKE RESPONSE
Designed for 2000 gas gas EC 250, these Boyesen reeds are engineered to improve airflow efficiency, throttle control, and power delivery. Built with performance-focused materials, they help your engine respond more cleanly across demanding riding conditions.


X-CROSS DUAL CARBON WEAVE
All RC2 Pro Series reeds feature the absolute highest quality aerospace grade carbon material interwoven into specific tension combinations that maximize power delivery. Boyesen engineers specifically tune the carbon matrix tension using a proprietary weave formula and special layup techniques that optimize each specific reed tension to work in unision with the engine's unique intake pressure pulses for each make/model/year machine.
MS PLUS FLOW OPTIMIZATION
Boyesen's race-proven MS PLUS Optimization uses multi-staged reed petals to distribute the engine?s pulse forces over more surface area. By using a multiple reed petal stack, it is possible to acheive peak horsepower AND durability. The patented multi-stage design incorporates a specially shaped top reed petal and a ported bottom reed petal. The top petal is lightweight and resilient for crisp throttle response at partial throttle or low RPM. The stiffer, bottom petal is ported to provide maximum flow and horsepower at higher RPM.part number cross reference
| boyesen part number | serial number (start) | serial number (end) | UPC number | eu hts number | Southern number |
|---|---|---|---|---|---|
| RL-91 | 804429009589 | 84099100900 | |||
| parts unlimited | parts europe | tucker rocky | wpc | apico int | |
| 44051 | 59-75034 | ||||
| bihr | dist 1 | dist 2 | dist 3 | dist 4 | |
| 360171 |
Applications
| Machine type | make | model | year range | cc | FUEL SYSTEM | CYLINDERS |
|---|---|---|---|---|---|---|
| MX/OFFROAD/MINI | gas gas | EC 200 | 1999-2006 | 200 | ||
| MX/OFFROAD/MINI | gas gas | EC 250 | 1997-2005 | 250 | ||
| MX/OFFROAD/MINI | gas gas | EC 300 | 1999-2005 | 300 | ||
| MX/OFFROAD/MINI | gas gas | MC 250 | 1998-2005 | 250 | ||
| MX/OFFROAD/MINI | Yamaha | YZ 250 | 1996-1996 | 250 | ||
| ATV | gas gas | 300 Wild | 2002-2006 | 300 |
extended fitment
Yamaha YZ 250 96, Gas Gas EC 250 97-05, Gas Gas MC 250 98-05, Gas Gas EC 300 99-05, Gas Gas EC200 99-06, Gas Gas 300 Wild ATV 03-04









