BOYESEN reed valve replacement Pro Series BOYESEN reed valves system for GAS GAS, HONDA, TM RACING and YAMAHA 1985-2019

BOYESEN offers these reed petals for GAS GAS EC 200, EC 250, EC 300, MC 250, HONDA ATC 250, CR 250, FL 400 ODYSSEY PILOT, TRX 250 FOURTRAX 2WD, TRX 250 R FOURTRAX 2WD, TM RACING EN 250, EN 300, GS 250, MX 250, MX 300 and YAMAHA YZ 250 1985-2019. In the reed valve, thin reeds open to let the mixture in and close to stop it coming back out.

Why replace the reeds?

The benefits:

• Get the performance of a new reed valve back for little money.
• Lightweight material (often carbon) that reacts quickly.
• Quick replacement without changing the whole reed block.

Why choose BOYESEN?

Boyesen invented the dual-stage reed: a soft petal for low and mid revs, a stiffer one for top end, for more torque everywhere.

When should you replace the reeds?

A petal that no longer seals, or that is split or frayed, must be changed straight away: a piece drawn into the engine can damage it.

Specifications and fitting tips

• Reed valve replacement for Boyesen reed valves system
• Model-Specific variable tension reed petals (Aerospace carbon material)
• Manufacturer part number: PSR-21

Cross-Mania tip: Fit the petals the right way round (marking facing out) without bending them, and secure the screws with threadlocker.

Also needed with this part

• Reed block gasket : V FORCE G305 · V FORCE G05A
• Spark plug : NGK 3130 · NGK 3230

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
GAS GAS EC 200 2019
GAS GAS EC 200 2018
GAS GAS EC 200 2017
GAS GAS EC 200 2015
GAS GAS EC 200 2014
GAS GAS EC 200 2013
GAS GAS EC 200 2012
GAS GAS EC 200 2011
GAS GAS EC 200 2010
GAS GAS EC 200 2009
GAS GAS EC 200 2008
GAS GAS EC 200 2007
GAS GAS EC 200 2006
GAS GAS EC 200 2005
GAS GAS EC 200 2004
GAS GAS EC 200 2003
GAS GAS EC 200 2002
GAS GAS EC 200 2001
GAS GAS EC 200 2000
GAS GAS EC 200 1999
GAS GAS EC 250 2005
GAS GAS EC 250 2004
GAS GAS EC 250 2003
GAS GAS EC 250 2002
GAS GAS EC 250 2001
GAS GAS EC 300 2005
GAS GAS EC 300 2004
GAS GAS EC 300 2003
GAS GAS EC 300 2002
GAS GAS EC 300 2001
GAS GAS MC 250 2009
GAS GAS MC 250 2008
GAS GAS MC 250 2007
GAS GAS MC 250 2006
GAS GAS MC 250 2005
GAS GAS MC 250 2004
GAS GAS MC 250 2003
GAS GAS MC 250 2002
GAS GAS MC 250 2001
GAS GAS MC 250 2000
GAS GAS MC 250 1999
GAS GAS MC 250 1998
HONDA ATC 250 1988
HONDA ATC 250 1987
HONDA ATC 250 1986
HONDA ATC 250 1985
HONDA CR 250 2001
HONDA CR 250 2000
HONDA CR 250 1999
HONDA CR 250 1998
HONDA CR 250 1997
HONDA CR 250 1996
HONDA CR 250 1995
HONDA CR 250 1994
HONDA CR 250 1993
HONDA CR 250 1992
HONDA CR 250 1991
HONDA CR 250 1990
HONDA CR 250 1989
HONDA CR 250 1988
HONDA CR 250 1987
HONDA CR 250 1986
HONDA FL 400 ODYSSEY PILOT 1990
HONDA FL 400 ODYSSEY PILOT 1989
HONDA TRX 250 FOURTRAX 2WD 1987
HONDA TRX 250 FOURTRAX 2WD 1986
HONDA TRX 250 R FOURTRAX 2WD 1989
HONDA TRX 250 R FOURTRAX 2WD 1988
HONDA TRX 250 R FOURTRAX 2WD 1987
HONDA TRX 250 R FOURTRAX 2WD 1986
TM RACING EN 250 2000
TM RACING EN 250 1999
TM RACING EN 250 1998
TM RACING EN 300 2000
TM RACING EN 300 1999
TM RACING EN 300 1998
TM RACING EN 300 1997
TM RACING GS 250 2001
TM RACING GS 250 2000
TM RACING GS 250 1999
TM RACING GS 250 1998
TM RACING GS 250 1997
TM RACING GS 250 1996
TM RACING GS 250 1995
TM RACING MX 250 2000
TM RACING MX 250 1999
TM RACING MX 250 1998
TM RACING MX 250 1997
TM RACING MX 250 1996
TM RACING MX 300 2000
TM RACING MX 300 1999
TM RACING MX 300 1998
TM RACING MX 300 1997
YAMAHA YZ 250 1996