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K&S Carburetor Air Cut Off Valve Kit

(5 reviews)

Item: 324879

$22.54 – $38.83

Select Your Vehicle - Fitment Guaranteed

K&S Carburetor Air Cut Off Valve Kit


Direct OEM-style replacement carburetor air cut off valve kit from K&S Technologies. Located on the side of the carburetor, the air cut off valve prevents a lean fuel mixture when decelerating and consequently - backfiring. It works by temporarily closing the pilot jet airway to provide a richer mix as the throttle closes. If your machine has a tendency to backfire, this may be one solution for solving your problem.

  • Reduces or prevents backfiring on deceleration
  • Includes all required diaphragm(s), spring(s) and/or O-ring(s) as required to service the OEM carburetor
Specification Details
Color Varies (make selection above)
OEM Reference Varies (make selection above)
Quantity Varies (make selection above)

Vehicle Fitment


Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.

Honda
  • CB1000C Custom 1983
  • CB1100F Super Sport 1983
  • CB400A Hawk Hondamatic 1978
  • CB400T Hawk 1980-1981
  • CB400TI Hawk I 1979
  • CB400TII Hawk II 1979
  • CB450SC Nighthawk 450 1982-1986
  • CB450T Hawk 450 1982
  • CB650 1979-1980
  • CB650C 650 Custom 1980
  • CB750C 750 Custom 1980-1982
  • CB750F 750 Super Sport 1979-1982
  • CB750K 750 Four 1979-1982
  • CB750L Limited 1979
  • CB750SC Nighthawk 750 1982-1983
  • CB900C 900 Custom 1980-1982
  • CB900F 900 Super Sport 1981-1982
  • CBX Super Sport 1979-1982
  • CM400A Hondamatic 1979-1981
  • CM400C Custom 1981
  • CM400E Economy 1980-1981
  • CM400T Twin 1979-1981
  • CM450A Hondamatic 1982-1983
  • CM450C Custom 1982
  • CM450E Economy 1982-1983
  • CRF230F 2003-2009, 2012-2014
  • CX500 1978-1979
  • CX500C Custom 1979-1982
  • CX500D Deluxe 1979-1981
  • FT500 Ascot Single 1982-1983
  • GL1000 Gold Wing 1975-1979
  • GL1100 Gold Wing 1980-1983
  • GL1100A Gold Wing Aspencade 1982-1983
  • GL1100I Gold Wing Interstate 1980-1983
  • GL1200 Gold Wing 1984
  • GL1200A Gold Wing Aspencade 1984-1987
  • GL1200I Gold Wing Interstate 1984-1987
  • GL500 Silver Wing 1981-1982
  • GL500I Silver Wing Interstate 1981-1982
  • GL650 Silver Wing 1983
  • GL650I Silver Wing Interstate 1983
  • NT650 Hawk GT 1988-1991
  • PC800 Pacific Coast 1989-1990, 1994-1998
  • VT1100C Shadow 1100 1987-1990, 1992-1996
  • VT1100C Shadow 1100 Spirit 1997-2003
  • VT1100C2 Shadow 1100 A.C.E. 1995-1999
  • VT1100C2 Shadow 1100 Sabre 2000-2003
  • VT1100C3 Shadow 1100 Aero 1998-2002
  • VT1100D2 Shadow 1100 A.C.E. 1999
  • VT1100T Shadow 1100 A.C.E. Tourer 1998-2001
  • VT600C Shadow 600 VLX 1989, 1991-1997, 1999-2007
  • VT600CD Shadow 600 VLX Deluxe 1993-2007
  • VT600CD2 Shadow 600 VLX Deluxe 1999-2000
  • VT750C2 Shadow 750 Spirit 2007-2009
  • VT750CA Shadow 750 Aero ABS 2004-2009
  • VTX1300C 2004-2009
  • VTX1300R 2005-2009
  • VTX1300S 2003-2007
  • VTX1300T 2008-2009
  • XL250R 1982-1983
  • XL250S 1978-1981
  • XL500R 1982
  • XL500S 1979-1981
  • XR250 1980
  • XR250R 1981-1983, 1986-2004
  • XR350R 1985
  • XR500 1979-1980
  • XR500R 1981-1982
  • XR600R 1988-2000
  • XR650R 2000-2007
Kawasaki
  • Brute Force 650 4x4 2005-2013
  • Brute Force 750 4x4i 2005-2007
  • Concours 1000 1986-2005
  • Eliminator 1000 1987
  • Eliminator 250 1988-1989, 1991
  • KFX400 2003-2006
  • KFX700 V-Force 2004-2009
  • KL650B Tengai 1990-1991
  • KLR600 1984-1986
  • KLR650 1987-2005
  • KLX125 2003-2006
  • KLX125L 2003-2006
  • KLX400R 2003
  • KLX650C 1993-1996
  • KLX650R 1993-1996
  • KZ1000J 1000 Standard 1981-1982
  • KZ1300A Standard 1979-1982
  • KZ1300B Touring 1980
  • Ninja 250R 1986-1990, 1992-2004
  • Ninja ZX-9R 1998-2003
  • Prairie 650 4x4 2002-2003
  • Prairie 700 4x4 2004-2006
  • Vulcan 1500 Classic 1996-2004
  • Vulcan 1500 L 1996-1997
  • Vulcan 1500 Nomad 1999-2001
  • Vulcan 700 1985
  • Vulcan 750 1986-2005
  • Vulcan 800 1995-2005
  • Vulcan 800 Classic 1996-2005
  • Vulcan 800 Drifter 1999-2006
  • Vulcan 88 1987-1995
  • Vulcan 88 SE 1990
Suzuki
  • Boulevard S40 2005-2009
  • Boulevard S50 2005-2009
  • Boulevard S83 2005-2009
  • DR-Z400 2000-2002
  • DR-Z400E 2000-2004
  • GV1200GL Madura 1200 1985-1986
  • GV700GL Madura 700 1985
  • Intruder 1400 1987-1988, 2004
  • Intruder 700 1986-1987
  • Intruder 750 1988-1991
  • Intruder 800 1992-2004
  • LS650 Savage 650 1986-1988, 1995-2004
  • LT-A400 Eiger 400 Auto 2x4 2002-2004
  • LT-A400F Eiger 400 Auto 4x4 2002-2004
  • LT-A500F Vinson 500 Auto 4x4 2002-2004
  • LT-F400 Eiger 400 2x4 2002-2004
  • LT-F400F Eiger 400 4x4 2004
  • LT-F500F Vinson 500 4x4 2003-2004
  • LT-Z400 QuadSport 400 2003-2008
  • Marauder 800 1997-2004
  • SV650 1999-2002
  • SV650S 1999-2002
  • VX800 1990-1993
Yamaha
  • Bear Tracker 2x4 1999-2004
  • Big Bear 350 2x4 1996
  • Big Bear 350 4x4 1987-1999
  • Big Bear 400 2x4 2000-2001
  • Big Bear 400 4x4 2000-2001, 2003-2005
  • Bruin 350 2x4 2004
  • Bruin 350 4x4 2004-2005
  • Bruin 350 Auto 2x4 2005
  • FZS1000 FZ1 2001-2005
  • Grizzly 600 4x4 1998-2000
  • Kodiak 400 2x4 2000-2001
  • Kodiak 400 4x4 1993-1999, 2001
  • Raptor 350 2004-2013
  • Raptor 660R 2001-2005
  • Royal Star Tour Deluxe 2005
  • Royal Star Venture 2000-2005
  • SR500 1980-1981
  • SRX250 1987
  • SRX600S 1986
  • TDM850 1992-1993
  • TT-R225 2001-2004
  • TT-R230 2005-2022
  • TT225 1986-1987
  • TT350 1986-1987
  • TT600 1983-1986
  • TW200 1987-2000
  • V-Star 1100 Classic 2000-2009
  • V-Star 1100 Custom 2000-2004
  • V-Star 1100 Silverado 2003-2005
  • V-Star 650 Classic 1998-2005
  • V-Star 650 Custom 1998-2004
  • V-Star 650 Silverado 2003-2005
  • VMX1200 VMAX 1985-1986, 1988-2005
  • WR250F 2001-2013
  • WR400F 2000
  • WR426F 2001-2002
  • WR450F 2003-2011
  • Wolverine 350 4x4 1995-2005
  • XC50 Vino Classic 2006-2011
  • XT225 1993-2005
  • XT350 1985-2000
  • XT500 1980-1981
  • XT550 1983
  • XT600E 1990-1995
  • XV1100 Virago 1100 1988-1999
  • XV500 Virago 500 1983
  • XV535 Virago 535 1990, 1993-2000
  • XV750 Virago 750 1988-1997
  • XVZ1200 Venture 1983-1984
  • XVZ1200 Venture Royale 1983-1985
  • XVZ1300D Venture Royale 1986-1993
  • YFM350ER Moto-4 1987-1990, 1992-1995
  • YFM350X Warrior 1987-2004
  • YFP350U Terra Pro 1988
  • YFZ450 ATV 2004-2009

Customer Reviews

Write Review

They are great.

By   on  Verified Purchaser

They fit, and it is running again.


Cut Off Valve

By   on  Verified Purchaser

It fit with no problem.


Good deal

By   on  Verified Purchaser

Worked great


K&S Cut Off Valve

By   on  Verified Purchaser

Worked great.


Cut Off Valve Fits

By   on 

Fit my bike, runs fine. Still trying to find out why it sputters.


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Questions & Answers

Ask Question

Do I need to purchase 2 of these kits or just 1 for a 1995 Honda Shadow?

In the case of the Honda Shadows, both the 750 and 1100 cc variants, these kits come with enough parts to service two carburetors. What you see photographed when you select your bike from the fit menu is exactly what you'd get.

By Staff
Answer Question

Does this kit come with two diaphragms or just one?

It depends on what machine you're fitting the kit to. What you see photographed once you select your make, model and year is exactly what you'd receive from your order.

By Staff
Answer Question

Does this come with two diaphragms or just one?

Only kits that fit 1997-2003 model year Honda VT1100C Shadow models include two diaphragms. All other kits are shipped with only one diaphragm.

By Staff
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