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SHIPPING UPDATE: Due to high demand, orders are currently processing in 5-7 business days. Need it faster? Contact us to upgrade to expedited shipping! If you’ve found the item elsewhere or can’t wait, no problem—we completely understand. Just reach out to us, and we’ll cancel your order. Thanks for your patience and support! BRAPPPPPPPPPP!

Honda TRX400EX

Honda 400EX Rebuild Kits, Pistons, and Parts

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$281.46
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Honda 400EX 400X Wiseco 85mm Stock Bore 11:1 Piston COMETIC Top End Gasket Kit

Wiseco

Wiseco 85mm Stock Bore 11:1 Compression Piston & Cometic Top End Gasket KitFits Honda TRX 400EX & 400XYears 1999 2000 2001 2002 2003 2004 2...

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05-14 TRX400EX TRX 400EX TITANIUM Cylinder Head Valve Cover Bolt Kit Ti Bolts

BPRATV Talon Titanium

BPRATV - The Original Trailblazer for Titanium Hardware in the ATV Industry. Fits Honda TRX 400EX 400X XR400 All Years!Race to the finish line with...

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Honda TRX400EX TRX 400EX TITANIUM Exhaust Studs Valve Head Valve Cover Bolt Kit

BPRATV Talon Titanium

92900-08022-0B, 90301-HM8-000, 95701-08070-00, 90084-KCY-670, 90004-GHB-700, 90004-GHB-760, 90004-GHB-710BPRATV - The Original Trailblazer for Tita...

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Honda TRX400EX TRX 400EX Kibblewhite Head Fix +1mm Intake Exhaust Valves Springs

Kibblewhite Precision

Best Honda TRX 400EX Kibblewhite Valves Spring Kit On Sale, 30-3111, 30-3116, 30-3118, 71016-4, 71016, 12209-413-003, 14711-KCY-670, 14721-KCY-670,...

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Honda TRX400EX TRX 400EX ARP Style Stronger Heavy Duty Cylinder Head Studs Kit

Kibblewhite Precision

Brand New Kibblewhite Extreme Heavy Duty Head Stud KitHonda 400EX & 400X Years 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011...

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Kibblewhite Honda TRX 400EX 400X Stronger Heavy Duty Cylinder Head Studs Kit

Kibblewhite Precision

Brand New Kibblewhite Extreme Heavy Duty Head Stud KitHonda 400EX & 400X Years 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011...

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05-14 Honda 400EX 400X Wiseco Crank Rod Motor Rebuild Repair Kit Piston Gaskets

Wiseco

Complete Wiseco Complete Engine Rebuild Rebuild Kit!Honda TRX400EX & TRX400X Years 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 ONLYThis k...

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$999.99
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05-14 400EX 400 EX 89mm BPR Simple Rebuild Kit CP Piston Complete Gaskets Seals

BPRATV

Honda TRX 400EX 400X Simple Rebuild Kit (Big Bore 89mm) We've heard your feedback! Some of our kits are Too Complete. We mean it when we say no one...

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05-14 400EX 400 EX Stock Simple Rebuild Kit Wiseco Piston Complete Gaskets Seals

BPRATV

Honda TRX 400EX 400X Simple Rebuild Kit (Stock Bore 85mm) We've heard your feedback! Some of our kits are Too Complete. We mean it when we say no o...

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$999.99
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99-14 TRX400EX 400EX 400X XR400 89mm 10.8:1 440cc JE Piston Cometic Gaskets Kit

JE Pistons

JE 89mm 10.8:1 416cc Big Bore Piston Kit & Cometic Top End Gasket SetFits Honda TRX400EX, TRX400X, and XR400Years 1999 2000 2001 2002 2003 2004...

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TRX400EX TRX 400EX Big Bore Kit 87mm Cylinder Stage 2 Hotcam Top End Rebuild Kit

BPRATV

FITS ALL HONDA TRX400EX, 400X, AND XR400R MODELS AND YEARS NEW 87mm cylinder Wiseco CP or JE forged piston Hi temp piston rings Wristpin Circlips ...

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TRX400EX TRX 400EX 400X Complete Assembled Head Porting Port Assemble Valves Kit

BPRATV

FITS ALL HONDA TRX400EX AND 400X MODELS AND YEARS NEW AFTER MARKET cylinder head with valve cover  Full race port and polish  Complete head assem...

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TRX400EX TRX 400EX Stage 3 Hotcam Hot Cam Valves Springs Chain Head Rebuild Kit

Hot Cams

FITS ALL HONDA TRX400EX TRX400X AND XR400R YEARS AND MODELS   COMPLETE HEAD REBUILD KIT! Stage 3 Hotcam Cam bearings Rocker arms Rocker arm shaft...

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TRX 400EX 400X Cylinder Head Valve Cover Complete Rebuild Kit Stage 2 Hot Cam

BPRATV

FITS ALL HONDA 400EX 400X AND XR400R MODELS AND YEARS - THE ONLY TRULY COMPLETE REBUILD KIT ONLINE All parts are aftermarket Cylinder head Valve ...

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TRX 400EX Stage 1 Hotcam Hot Cam Chain Guides Black Tensioner Guide Bearings Kit

Honda OEM

FITS ALL XR400R TRX400EX and TRX400X MODELS Hotcams Stage 1 camshaft SKF cam bearings Heavy duty cam chain conversion OEM Honda cam chain guides B...

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TRX 400EX 400X Stock Bore Cylinder Cam Camshaft 85mm Top End Rebuild Parts Kit

BPRATV

FITS ALL HONDA 400EX 400X XR400R YEARS AND MODELS!! Aftermarket 85mm cylinder Standard 85mm 10:1 piston Piston rings Wristpin Circlips Top end ga...

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TRX 400EX 400X Stage 2 Hot Cam Kibblewhite Valve Springs Head Rebuild Redo Kit

Kibblewhite Precision

FITS ALL HONDA 400EX 400X AND XR400R MODELS AND YEARS - THE ONLY TRULY COMPLETE REBUILD KIT ONLINE Stage 2 Hotcam SKF cam bearings Kibblewhite st...

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Honda TRX 400EX 400X Complete Head Rebuild Redo Kibblewhite Valves Valve Springs

BPRATV

FITS ALL HONDA 400EX 400X AND XR400R MODELS AND YEARS - THE ONLY TRULY COMPLETE REBUILD KIT ONLINE Kibblewhite stainless steel intake and exhaust v...

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Honda TRX 400EX 400X 87mm Big Bore Kit +2 Cylinder Head Assembly Top End Repair

BPRATV

  FITS ALL HONDA TRX400EX, 400X MODELS AND YEARS Genuine BPR aftermarket cylinder head Cylinder head valve cover 87mm cylinder Wiseco or Wos...

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99-04 400EX 87mm Big Bore Rebuild Kit Top Bottom End Motor Engine Repair Redo

BPRATV

Works on all '99-04 Honda 400EX models 87mm big bore cylinder 87mm big bore Wiseco or Wossner forged piston Nitrite coated piston rings Chrome wr...

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$1,799.99
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Best 400EX 400X XR400 Cylinder Head Studs ALL TITANIUM Stud Bolt Nut Upgrade Kit

BPRATV Talon Titanium

Works on all Honda 400EX 400X and XR400R models and years All Grade 5 Titanium Alloy kit Heat treated, allen head studs 12 point flange nuts and 3...

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$138.99
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Best TRX 400EX 400X Wheel Bearings Complete Left Right Front Hub Bearing Kit Set

SKF

FITS ALL HONDA TRX400EX AND 400X YEARS AND MODELS!  SKF set of 4 front wheel bearings Replacement for both left and right front hubs Better than O...

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$571.99
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Save 92% Save %
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99-04 TRX 400EX Bottom End Rebuild Kit Hotrods Crank Lower Motor Engine Assembly

BPRATV

FITS ALL '99-04 HONDA 400EX MODELS Hotrods replacement crankshaft with rod assembled SKF heavy duty replacement crank bearings Complete gasket ki...

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$494.06
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$1,299.99
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Honda 400EX 400X +1 Ported Assembled Head Port Porting Kibblewhite +1mm Valves

BPRATV

FITS ALL HONDA TRX400EX, 400X, AND XR400R MODELS AND YEARSNEW after-market cylinder head and valve cover Full race port and polish Valve guides cut...

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$1,299.99
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$134.89
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400EX 400X XR400 Kibblewhite Valves Valve Seals Black Diamond Intake Exhaust Kit

Kibblewhite Precision

FITS ALL HONDA 400EX 400X AND XR400R MODELS AND YEARS!! Kibblewhite Black Diamond kit Stainless steel one-piece valve construction MADE IN USA Std ...

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$149.99
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$149.99
$134.89
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$1,199.99
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99-04 TRX 400EX Big Bore Stroker Complete 465 Rebuilt Motor Engine Rebuild Kit

BPRATV

WORKS ON ALL '99-04 HONDA 400EX MODELS - BUY IN BULK AND SAVE $$ 89mm aftermarket big bore cylinder 89mm CP-Carrillo CUSTOM  Hotrods +4mm stroke...

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$1,299.99
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$1,199.99
Save 8% Save %
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$436.78
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$436.78
$304.88
$304.88 - $304.88
$304.88

TRX400EX 400EX 400X XR400 87mm Big Bore Cylinder JE Piston & Gaskets Rebuild Kit

BPRATV

1043-2, M2002, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, 30-33750, 13011-KCY-670, 90601-KA5-000, 13103-KCY-...

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$304.88
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$304.88
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$304.88
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$304.88

TRX400EX 400EX 400X XR400 88mm Big Bore Cylinder JE Piston & Gaskets Rebuild Kit

BPRATV

1043-2, M2002, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, 30-33750, 13011-KCY-670, 90601-KA5-000, 13103-KCY-...

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$436.78
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$436.78
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$304.88
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$436.78
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$436.78
$304.88
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$304.88

TRX 400EX 400X 88mm Big Bore Cylinder 13:1 JE Piston Cometic Top End Rebuild Kit

BPRATV

1043-2, M2002, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, 30-33750, 13011-KCY-670, 90601-KA5-000, 13103-KCY-...

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$436.78
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$436.78
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$304.88
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$436.78
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$436.78
$304.88
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$304.88

TRX 400EX 400X XR400 88mm Big Bore Cylinder 13:1 JE Piston & Gaskets Rebuild Kit

BPRATV

1043-2, M2002, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, 30-33750, 13011-KCY-670, 90601-KA5-000, 13103-KCY-...

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$436.78
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$436.78
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$304.88
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Save 22% Save %
$888.89
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$688.89

TRX400EX 400EX Assembled Cylinder Head Stage 2 Hot Cams Chain & 87 88 89 Cometic

BPRATV

14711-KCY-670, 14721-KCY-670 14411-KCY-670, 14431-KCY-670, 14445-KF0-000 14446-KF0-000, 14751-KCY-670, 14761-KG0-003 14451-MBV-000, 14781-HA0-770, ...

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$688.89
Save 22% Save %
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$919.89
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$919.89
$649.89
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$649.89

400EX 400X XR400R Cylinder Head Stage 2 Hot Cams WISECO Chain Stock Cometic Kit

BPRATV

14711-KCY-670, 14721-KCY-670 14411-KCY-670, 14431-KCY-670, 14445-KF0-000 14446-KF0-000, 14751-KCY-670, 14761-KG0-003 14451-MBV-000, 14781-HA0-770, ...

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$919.89
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$919.89
$649.89
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$649.89
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$479.99
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$316.99
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Honda TRX 400EX X Top End Rebuild Repair Kit CP Carrillo Piston Gaskets Cylinder

BPRATV

Complete Standard Bore Top End Rebuild Kit!Honda TRX400EX & TRX400X Years 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012...

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$479.99
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$316.99
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$1,419.99
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$1,199.99
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$1,199.99

05+ 400EX 400X Big Bore Stroker Complete 465cc Rebuilt Motor Engine Rebuild Kit

BPRATV

4240,CBK0037,CBK0163,808894,TBK0012,K014, 12100-KCY-670, 4606M08500, C7826, 71016-412191-KCY-673, 13011-KCY-670, 90601-KA5-00013103-KCY-670, 13111-...

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$16.60
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$14.94
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$14.94

Scott Moto Black Grips ATV PWC BMX Handle Bar Grip Set Black YFZ450 TRX450 400EX

Scott Sports

Enhance your off-road experience with the Scott Moto Black Grips ATV PWC BMX Handle Bar Grip SetUpgrade your off-road ride with the Scott Moto Blac...

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$16.60
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$16.60
$14.94
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$14.94
Save 10% Save %
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$67.94
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Honda TRX400EX TRX 400EX 400X WISECO Extreme Heavy Duty Timing Cam Chain CC004

Wiseco

Wiseco, Cam Chain, XR400R ’96-04 / TRX400EX / X ’99-14 A critical component to four-stroke top-end and valvetrain maintenance, Wiseco cam chains ar...

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$67.94 - $67.94
$67.94
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$67.94

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