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Due to Thanksgiving and the holiday rush, our current handling time is approximately 4–5 business days. We sincerely appreciate your patience and understanding. We truly appreciate your business and are thankful for another great year serving our customers. If you have any questions or concerns, please contact us—our team is working as hard as possible to ship all orders promptly.
Due to Thanksgiving and the holiday rush, our current handling time is approximately 4–5 business days. We sincerely appreciate your patience and understanding. We truly appreciate your business and are thankful for another great year serving our customers. If you have any questions or concerns, please contact us—our team is working as hard as possible to ship all orders promptly.

Honda TRX400EX

Honda 400EX Rebuild Kits, Pistons, and Parts

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TRX 400EX TRX 400EX 88mm Big Bore Stage 2 Cam +1 Valves +3 Cylinder Hotcams KPMI

BPRATV

FITS ALL HONDA TRX400EX, 400X, AND XR400R MODELS AND YEARS NEW after market 88mm cylinder Wiseco or JE forged piston* Nitrite coated piston rings C...

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05-14 Honda TRX 400EX 400X Hotrods Crank Rod Rebuild Kit Piston Gaskets Seals

Wiseco

Complete HOTRODS Complete Engine Rebuild Rebuild Kit with a WISECO Piston!In Stock - Ships within 24 hours!!!Honda TRX400EX & TRX400X Years 200...

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Honda TRX 400EX 400X Top End Rebuild Repair Kit Wossner Piston Gaskets Cylinder

Wossner

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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Honda 400EX 400X XR400 Complete Titanium Left Crankcase Cover Bolts Screws Kit

BPRATV Talon Titanium

BPRATV - The Original Trailblazer for Titanium Hardware in the ATV Industry. Fits Honda TRX 400EX 400X XR400 All Years!Replaces OEM Part #: 90004-G...

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99-04 400EX 400 EX 88mm Simple Rebuild Kit Wiseco Piston Complete Gaskets Seals

Hot Rods

Honda TRX 400EX 400X Simple Rebuild Kit (Big Bore 88mm) 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 BPR Stock Simple Rebuild Kit CP 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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99-04 400EX 400 EX 89mm Simple Rebuild Kit Wossner 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 85mm Simple Rebuild Kit Wossner Piston Complete Gaskets Seals

BPRATV

Honda TRX 400EX 400X Simple Rebuild Kit (OEM Stock Bore 85mm) We've heard your feedback! Some of our kits are Too Complete. We mean it when we say ...

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05-14 400EX 400 EX 87mm Simple Rebuild Kit Wossner Piston Complete Gaskets Seals

BPRATV

Honda TRX 400EX 400X Simple Rebuild Kit (Big Bore 87mm) 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 87mm Simple Rebuild Kit Wiseco Piston Complete Gaskets Seals

BPRATV

Honda TRX 400EX 400X Simple Rebuild Kit (Big Bore 87mm) We've heard your feedback! Some of our kits are Too Complete. We mean it when we say no one...

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99-08 Honda TRX400EX TRX 400EX 09-14 TRX 400X Hot Rods Connecting Rod Kit 8609

Hot Rods

Hot Rods Connecting Rod Kit Works for Honda 1999-2008 Sportrax 400EX / 2009-2014 TRX 400X Models A High Quality Replacement Part Designed to Imp...

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Honda 400EX OEM Stock Cylinder 85mm Wiseco Piston 10:1 Cometic Gasket KPMI Viton

BPRATV

Genuine Honda OEM Stock Bore 85mm Cylinder | 12100-KCY-670  Wiseco 85mm 10:1 Compression Piston | 4606M08500 Nitrite-coated piston rings | 3386XC ...

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Honda 400EX OEM Big Bore 86mm Cylinder Wiseco Piston Kit 10:1 Cometic Gasket Kit

BPRATV

Genuine Honda OEM BIG BORE 86mm Cylinder | 12100-KCY-670  Bored & Diamond Honed New OEM Cylinder Wiseco 86mm 10:1 Compression Piston | 4606M08...

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05-08 Honda Sportrax TRX 400EX 09-14 400X Vertex Complete Engine Seal Kit 822278

Vertex

Fits 05-08 Honda Sportrax 400 EX / TRX 09-14 400X Models  Vertex Engine Complete Oil Seal Kit Set Includes: Crankshaft Output Shaft Water Pump ...

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Honda 400EX XR400 87mm 416cc Big Bore Wiseco Piston Replacement Rings Set 3425XC

Wiseco

Honda 400EX / 400X / XR400 87mm Wiseco Big Bore Piston Replacement Rings KitPart# 3425XCThese rings are for Wiseco Piston Part #'s 4606M08700 &...

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TRX400EX TRX 400EX 87 mil Big Bore 416 Cylinder Complete Rebuilt Top End Rebuild

BPRATV

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

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TRX400EX TRX 400EX Cylinder Stock Bore Top End Rebuild Hot Cam Bearings Complete

BPRATV

1043-2, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, 30-33750, 13011-KCY-670, 90601-KA5-000, 13103-KCY-670, 13...

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TRX400EX TRX 400EX Stage 3 Hotcam Kibblewhite Valve Spring Complete Head Rebuild

BPRATV

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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TRX400EX 400EX 400X 87 mil Big Bore Cylinder Kit Complete 416 Top End Rebuild

BPRATV

FITS ALL HONDA TRX400EX, 400X, AND XR400R MODELS AND YEARS   - 87mm after market cylinder  - 87mm JE CP or Wiseco forged piston**  - Piston rings  ...

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TRX400EX TRX 400EX Cam Timing Chain Red Tensioner Dampener Lifter Top End Gasket

Honda OEM

FITS ALL HONDA TRX400EX, 400X, AND XR400R MODELS AND YEARS After market heavy duty cam chain conversion Cam chain dampener 1 and 2 Red billet cam c...

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TRX400EX TRX 400EX XR400 87 mil Big Bore Kit 416 Cylinder Top End Rebuild Kit

BPRATV

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

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TRX400EX TRX 400EX Cylinder Namura Top End Piston Rebuild Kit Stock 85 mil 11:1

BPRATV

TOP END REBUILD FROM THE BEST!  CALL TO ORDER OR WITH ANY QUESTIONS!  SE HABLA ESPANOL FITS ALL HONDA TRX400EX, 400X, AND XR400R MODELS AND YEARS ...

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TRX400EX TRX 400EX XR Stage 2 Hotcam Cylinder Wiseco Piston Top End Rebuild Kit

BPRATV

FITS ALL HONDA TRX400EX, 400X, AND XR400R MODELS AND YEARS NEW after market 85mm cylinder Wiseco CP or JE forged piston** Hi temp piston rings Wri...

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TRX400EX TRX 400EX Head Cylinder 87 mil Big Bore Kit Cover Top End Rebuild

BPRATV

FITS ALL HONDA TRX400EX, 400X, AND XR400R MODELS AND YEARS New after-market cylinder head - NO VALVES OR SPRINGS HEAD ONLY Aftermarket cylinder he...

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TRX400EX TRX 400EX 89mm Big Bore Stage 3 Hotcam Camshaft 440 Top End Rebuild Kit

BPRATV

4794M08900,C7826,12100-KCY-670,208552,1051-3,3P-440,C7826-EST,HC92RH2015112,DPR8Z,, M2002, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826...

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Racing Valve Spring Kit Kibblewhite 30-3111 For 99-14 Honda TRX400EX TRX400X

Kibblewhite Precision

Type Intake / Exhaust Retainer Material Titanium Valve Lift 0.300” Installed Height 1.375" Seat Pressure 70# Open Pressure 157# @ Lif...

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Honda TRX 400EX Sportrax Titanium Lug Nuts Front Rear Wheel Ti Lug Nut Set of 4

BPRATV

Honda TRX 400EX Sportrax Lug Nuts4-Pack of Titanium 12 point flange nutsMade from heat treated Grade 5 Titanium AlloyMuch stronger than standard lu...

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New Honda TRX400EX Sportrax 89mm Big Bore 87 88 89 .027" MLS Cometic Head Gasket

Cometic Gaskets

FITS ALL HONDA 400EX MODELS AND YEARS!89mm Head Gasket for all 400EX Big Bore CylindersPatented MLS Multi-Layer Steel ConstructionMADE IN USABuy in...

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Honda TRX 400EX Sportrax Titanium Lug Nuts For All Wheels Front Rear Nut Set 16

BPRATV

YOUR BEST ONLINE SOURCE FOR HARD TO FIND TITANIUM LUG NUTS!  SAVE BIG WHEN YOU BUY IN BULK!Honda TRX 400EX Sportrax Lug Nuts16-Pack of Titanium 12 ...

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Honda Sportrax 400EX TRX 400EX 400X Stock Bore 85mm 10:1 Aftermarket Piston Kit

BPRATV

FITS ALL HONDA SPORTRAX TRX 400EX YEARS AND MODELS!!Standard Aftermarket 85mm 10:1 pistonPiston ringsWristpinCirclipsFits all 85mm 400EX cylinders

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99-04 400EX Rebuilt Motor Engine Assembly 87mm Big Bore Ported Assembled Head

BPRATV

COMPLETE BUILT BIG BORE MOTOR!Used core bottom end with all BRAND NEW parts listed below87mm big bore cylinder 87mm Wiseco forged piston Piston rin...

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Honda 400EX 400X 89mm Piston Wiseco Big Bore +4 Over Piston Cometic Gasket Kit

BPRATV

Works on all Honda 400EX, 400X, and XR400R models and years Wiseco 89mm big bore forged piston Nitrite coated piston rings Chrome wristpin Circli...

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$211.97
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Honda 400EX 400X 88mm Piston Wiseco Big Bore +3 Over Piston Cometic Gasket Kit

Wiseco

Works on all Honda 400EX, 400X, and XR400R models and yearsWiseco 88mm big bore forged pistonNitrite-coated piston ringsChrome wrist-pinCirclipsCom...

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$207.97
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Port 400EX 400X Cylinder Head Ported Porting Assembled Kibblewhite Valves Spring

BPRATV

Brand new aftermarket cylinder head and valve cover Full race port and polish Intake, exhaust, and combustion chamber Valve guides cut Complete a...

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TRX 400EX 400X Cylinder Head Assembly Assembled Head Valves Springs Rocker Arms

BPRATV

Brand new aftermarket cylinder head and valve cover Complete assembly of both head and valve cover except camshaft Valve springs, retainers, and ...

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Honda 400EX 400X Top End Rebuild Cylinder Head Valve Cover Stock Upper Assembly

BPRATV

FITS ALL HONDA TRX400EX, 400X, AND XR400R MODELS AND YEARS NEW aftermarket cylinder 10:1 piston Hi-temp piston rings Chrome wrist pin Circlips To...

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$699.99
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TRX 400EX 400X XR 89 mil Big Bore Kit +4 Cylinder Hi Comp Top End Rebuild Hotcam

BPRATV

FITS ALL HONDA 400EX 400X XR400 MODELS AND YEARS NEW aftermarket 89mm big bore cylinder Wiseco or CP forged piston** The piston is hi comp RA...

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$649.99
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Honda 400EX 400X Port Ported Head Porting Assembly Assembled Kibblewhite Valves

BPRATV

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

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$1,199.99
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TRX 400EX 400X XR 88m Big Bore Kit Stage 3 Hotcam Hot Cam +3 Top End Rebuild Kit

BPRATV

Compatible Vehicles Submodel Year Make Model TRX400EX 2x4 2008 Honda Sportrax 400 TRX400EX 2x4 2007 Honda Sportrax 400 TRX400EX 2x4 20...

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Honda 400EX 400X 88mm Rebuild Kit Top Bottom Big Bore Motor Engine Assembly 426c

BPRATV

WORKS ON ALL 2005+ HONDA 400EX AND 400X MODELS Aftermarket 88mm big bore cylinder 88mm big bore Wiseco JE or CP forged piston* Nitrite coated pisto...

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TRX 400EX 400X XR Stock Standard Bore Cylinder Hotcam 85mm Top End Rebuild Kit

BPRATV

FITS ALL HONDA 400EX 400X XR400 MODELS AND YEARS NEW aftermarket cylinder Wiseco JE or CP forged piston** Piston is hi comp pump gas version Hi ...

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$449.99
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$405.89
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TRX 400EX 400X Stage 3 Three Hotcam Hot Cam Kibblewhite Valve Springs Complete

BPRATV

FITS ALL HONDA TRX400EX, 400X, AND XR400R MODELS AND YEARSStage 3 HotcamKibblewhite race valve spring kit Viton valve stem seals Big bore top end g...

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$449.99
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TRX 400EX 400X Stage 1 Hotcam Kibblewhite Valve Springs Head Rebuild Redo Kit

BPRATV

FITS ALL HONDA 400EX 400X AND XR400R MODELS AND YEARS - THE ONLY TRULY COMPLETE REBUILD KIT ONLINE Stage 1 Hotcam SKF cam bearings Kibblewhite st...

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$788.88
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$788.88
$648.88
$648.88 - $648.88
$648.88
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$1,000.98
$1,000.98 - $1,000.98
$1,000.98
$750.74
$750.74 - $750.74
$750.74

TRX 400EX 400X XR 87m Big Bore Kit Stage 2 Hotcam Hot Cam +2 Top End Rebuild Kit

BPRATV

FITS ALL HONDA 400EX 400X XR400 MODELS AND YEARS NEW aftermarket 87mm cylinder Wiseco JE or CP forged big bore piston** Hi-temp piston rings ...

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$1,000.98
$1,000.98 - $1,000.98
$1,000.98
$750.74
$750.74 - $750.74
$750.74
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$899.99 - $899.99
$899.99
$899.99 - $899.99
$899.99

TRX 400EX 400X Cylinder Head Valves Assembled Kibblewhite Valve Springs Rockers

BPRATV

FITS ALL HONDA TRX400EX, 400X, AND XR400R MODELS AND YEARS NEW after market cylinder head and valve cover Complete head assembly Kibblewhite valve ...

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$899.99 - $899.99
$899.99
$899.99 - $899.99
$899.99
$359.99 - $359.99
$359.99
$359.99 - $359.99
$359.99

TRX 400EX 400X Stage 2 Two Hotcam Hot Cam Kibblewhite Valve Springs Complete Kit

BPRATV

FITS ALL HONDA TRX400EX, 400X, AND XR400R MODELS AND YEARSStage 2 HotcamKibblewhite race valve spring kit Viton valve stem seals Big bore top end g...

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$359.99 - $359.99
$359.99
$359.99 - $359.99
$359.99
$599.99 - $599.99
$599.99
$599.99 - $599.99
$599.99

TRX400 400EX 400X Stock Cylinder 85m Complete Top End Rebuild Stage 1 Hotcam Kit

BPRATV

FITS ALL HONDA TRX400EX, 400X, AND XR400R MODELS AND YEARS   - 85mm after market cylinder  - 85mm JE CP or Wiseco forged piston**  - Piston rings  ...

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$599.99 - $599.99
$599.99
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$599.99
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$472.99
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$472.99
$469.99
$469.99 - $469.99
$469.99

TRX 400EX 400X XR400 89mm Big Bore Kit Hi Comp Race Gas 12.5:1 440 Rebuild Kit

BPRATV

FITS ALL HONDA TRX400EX, 400X, AND XR400R MODELS AND YEARS NEW after market 89mm cylinder Wiseco CP or JE forged piston** Hi temp piston rings Wri...

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$472.99
$472.99 - $472.99
$472.99
$469.99
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$469.99
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