





photos are representational: Accuracy is ensured by Part Numbers.
A POWERFUL SOLUTION TO A SIMPLE PROBLEM
Designed for 1998 arctic cat Thundercat, this Boyesen component is built to support dependable fitment, durability, and reliable performance for serious riders.
One reed petal is NOT enough! The reed petals in all 2 stroke engines take an incredible amount of abuse! At peak RPM, reed petals are opening and closing hundreds of times per second. Over time, a single reed loses its ability to regulate flow rates in proper proportions. This causes a loss of reed petal reaction and reduces the consistency of peak horsepower. Boyesen's revolutionary dual-stage reed design delivers more usable power than stock. Stock single-stage reeds operate most effectively within a relatively narrow RPM range and are limited because of the single stage design. Boyesen's one soft reed on top of one firm flow-through reed gives you a wide range of intake control, plus increased intake velocity. Your original reeds can't possibly duplicate that performance. The dual-stage design allows you to replace your stock reed stop with a Rev-Plate which permits the reeds to open freely and function efficiently. The multi-port feature of the bottom reed creates more channels for the charge, delivering increased velocity to the intake ports and generating more overall power. Dual-stage reeds work in unison to perform efficiently throughout the entire powerband. The difference in stiffness between the top reed and the bottom reed allow the reeds to respond quickly and accurately to changes in engine pressure. This translates into quicker acceleration, crisper throttle response and increased horsepower throughout the powerband.
THE BOYESEN POWER REED ADVANTAGE
Dual-stage reeds work in unison to perform efficiently throughout the entire powerband. The difference in stiffness between the top reed and the bottom reed allow the reeds to respond quickly and accurately to changes in engine pressure. This translates into quicker acceleration, crisper throttle response and increased horsepower throughout the powerband.


MS PLUS FLOW OPTIMIZATION
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. By using a multiple reed petal stack, it is possible to acheive peak horsepower, more torque, improved stall resistance and greater overall reed durability.
FREE REVING POWER
The dual-stage design allows you to replace your stock reed stop with a Rev-Plate which permits the reeds to open freely and function efficiently. This results in a free reving, yet extremely smooth power delivery with an improved connection between your hand, the rear wheel and the terrain.part number cross reference
| boyesen part number | serial number (start) | serial number (end) | UPC number | eu hts number | Southern number |
|---|---|---|---|---|---|
| RG50 | 804429504244 | ||||
| parts unlimited | parts europe | tucker rocky | wpc | apico int | |
| bihr | dist 1 | dist 2 | dist 3 | dist 4 | |
Applications
| Machine type | make | model | year range | cc | FUEL SYSTEM | CYLINDERS |
|---|---|---|---|---|---|---|
| SNOWMOBILE | arctic cat | EXT 600 Triple | 1997-1998 | 600 | ||
| SNOWMOBILE | arctic cat | Mountain Cat 1000 | 2001-2002 | 1000 | ||
| SNOWMOBILE | arctic cat | Mountain Cat 500 | 2002-2002 | 500 | ||
| SNOWMOBILE | arctic cat | Mountain Cat 500 | 2001-2001 | 500 | ||
| SNOWMOBILE | arctic cat | Mountain Cat 600 | 2001-2004 | 600 | ||
| SNOWMOBILE | arctic cat | Pantera 1000 | 2001-2001 | 1000 | ||
| SNOWMOBILE | arctic cat | Pantera 600 | 2002-2005 | 600 | ||
| SNOWMOBILE | arctic cat | Pantera 800 | 1998-1999 | 800 | ||
| SNOWMOBILE | arctic cat | Powder Special 2K | 2000-2000 | 600 | ||
| SNOWMOBILE | arctic cat | Powder Special 500 EFI | 1999-2000 | 500 | ||
| SNOWMOBILE | arctic cat | Powder Special 600 | 1998-2000 | 600 | ||
| SNOWMOBILE | arctic cat | Powder Special 600 EFI | 1998-2000 | 600 | ||
| SNOWMOBILE | arctic cat | Thundercat | 1993-1998 | 900 | ||
| SNOWMOBILE | arctic cat | Thundercat | 1999-2002 | 1000 | ||
| SNOWMOBILE | arctic cat | Triple Touring 600 | 1999-2001 | 600 | ||
| SNOWMOBILE | arctic cat | ZL 500 | 1998-2002 | 500 | ||
| SNOWMOBILE | arctic cat | ZL 600 | 1999-2000 | 600 | ||
| SNOWMOBILE | arctic cat | ZL 600 | 1999-2003 | 600 | ||
| SNOWMOBILE | arctic cat | ZR 2K | 2000-2000 | 600 | ||
| SNOWMOBILE | arctic cat | ZR 440 | 1996-1998 | 440 | ||
| SNOWMOBILE | arctic cat | ZR 440 Sno Pro | 1998-2002 | 440 | ||
| SNOWMOBILE | arctic cat | ZR 500 | 1998-2002 | 500 | ||
| SNOWMOBILE | arctic cat | ZR 500 | 1999-2001 | 500 | ||
| SNOWMOBILE | arctic cat | ZR 600 | 1998-2002 | 600 | ||
| SNOWMOBILE | arctic cat | ZR 600 | 1998-2002 | 600 | ||
| SNOWMOBILE | arctic cat | ZR 600 Blair Morgan Signature Edition | 2000-2000 | 600 | ||
| SNOWMOBILE | arctic cat | ZRT 600 | 1995-2002 | 600 | ||
| SNOWMOBILE | arctic cat | ZRT 800 | 1995-2001 | 800 |
extended fitment
Arctic Cat ZR 600 Blair Morgan Signature Edition 00, Arctic Cat Mountain Cat 500 02, Arctic Cat Mountain Cat 500 01, Arctic Cat Mountain Cat 600 01-04, Arctic Cat Pantera 600 02-05, Arctic Cat Powder Special 2K 00, Arctic Cat Powder Special 500 EFI 99-00, Arctic Cat Powder Special 600 98-00, Arctic Cat Powder Special 600 EFI 98-00, Arctic Cat ZL 500 98-02, Arctic Cat ZL 600 99-00, Arctic Cat ZL 600 99-03, Arctic Cat ZR 2K 00, Arctic Cat ZR 440 96-98, Arctic Cat ZR 440 Sno Pro 98-02, Arctic Cat ZR 500 98-02, Arctic Cat ZR 500 99-01, Arctic Cat ZR 600 98-02, Arctic Cat EXT 600 Triple 97-98, Arctic Cat Mountain Cat 1000 01-02, Arctic Cat Pantera 1000 01, Arctic Cat Pantera 800 98-99, Arctic Cat Thundercat 93-98, Arctic Cat Thundercat 99-02, Arctic Cat Triple Touring 600 99-01, Arctic Cat ZRT 600 95-02, Arctic Cat ZRT 800 95-01


