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OEM & Performance ATV, UTV & Dirt Bike Parts for Yamaha, Honda, Polaris, Can-Am & More — Shipped Fast from BPRATV
OEM & Performance ATV, UTV & Dirt Bike Parts for Yamaha, Honda, Polaris, Can-Am & More — Shipped Fast from BPRATV

Honda TRX400EX

Honda 400EX Rebuild Kits, Pistons, and Parts

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SKF Cam Bearings For Honda TRX 400EX TRX 400X XR400 91003-KF0-008 91002-MN1-671

SKF
In stock

WORKS ON ALL HONDA 400EX 400X AND XR400R MODELS AND YEARSSKF OEM Upgrade Aftermarket Camshaft Bearing SetBearing Made in Germany / FranceReplaces H...

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

BPRATV Talon Titanium
Low stock

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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$449.99
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TRX 400EX 400 400X Kibblewhite +1 Valves Springs Complete Valve Head Rebuild Kit

Kibblewhite Precision
In stock

30-3111, 30-3116, 30-3118, 30-3120,30-3111, 30-3116, 30-3118, 30-3120, 14711-KCY-670, 14721-KCY-670 14411-KCY-670, 14421-KCY-670 14431-KCY-670, 144...

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$639.98
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$639.98

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

Wiseco
Out of stock

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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$1,264.95
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$499.99
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$499.99

TRX400EX TRX 400EX Stage 1 Hotcam Hot Cam Valves Springs Chain Head Rebuild Kit

BPRATV
In stock

FITS ALL HONDA TRX400EX TRX400X AND XR400R YEARS AND MODELS   COMPLETE HEAD REBUILD KIT! Stage 1 Hotcam Cam bearings Rocker arms Rocker arm shafts...

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$199.99
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$195.00
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$195.00

Honda 400EX 400X 87mm Piston Wiseco Big Bore +2 Over Piston Cometic Gasket Kit

BPRATV
Out of stock

Works on all Honda 400EX, 400X, and XR400R models and years Wiseco 87mm big bore forged piston Nitrite coated piston rings Chrome wristpin Circli...

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

Kibblewhite Precision
In stock

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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99-04 Honda 400EX Cylinder Head Complete Top Bottom End Rebuild Kit Assembly Kit

BPRATV
Out of stock

Works on all '99-04 Honda 400EX models 85mm stock bore cylinder 85mm stock bore Wiseco or Wossner forged piston Nitrite-coated piston rings Chrom...

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$149.99
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$149.99
$105.99
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$105.99

99-08 Honda 400EX Crank Pin Rod Bearing Bottom End Crankshaft Rod Rebuild Kit

BPRATV
Out of stock

WORKS ON ALL HONDA 1999-2008 400EX and 2009-2014 TRX 400X YEAR MAKE MODELS Aftermarket replacement crank pin and rod bearing Includes thrust wash...

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$149.99
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$1,099.99
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99-04 TRX 400EX Complete Rebuilt Motor Engine Rebuild Top & Bottom End Parts Kit

BPRATV
Out of stock

FITS ALL 99-04 HONDA TRX400EX SPORTRAX MODELS NEW after market cylinder CP JE or Wiseco forged piston** Hi temp piston rings Wristpin Circlips Hotr...

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$706.66
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400EX 400X XR400R Kibblewhite Valves Valve Springs Cylinder Head Valve Cover Kit

BPRATV
In stock

30-3111, 30-3115, 30-3117, 14721-KCY-670, 12200-KCY-670, 12200-HN1-A70, 12310-HN1-010, 12209-413-003, 14711-KCY-670, 71016-4, 71016, 8400003-2, 840...

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$102.99
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$89.98
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Honda TRX400EX 400EX 89mm 89 Big Bore Wiseco Piston Rings Set COMETIC Gasket Kit

Wiseco
In stock

Honda TRX400EX 89mm Wiseco Piston Rings + Cometic Gasket Kit Restore Power & Reliability This premium top-end refresh package combines Wisec...

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$149.99
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Best 400EX 400X XR400 Cylinder Head Studs ALL TITANIUM Stud Bolt Nut Upgrade Kit

BPRATV Talon Titanium
In stock

30-33750, 90085-KCY-670, 90083-KG0-981,Upgrade your Honda 400EX, 400X, or XR400R with the BPRATV Talon Titanium Cylinder Head Stud Kit. Stronger, ...

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$36.00
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$28.81
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Honda TRX400EX 400EX 400X XR400R Valve Keeper Cotters Complete Set 14781-HA0-770

BPRATV
In stock

Honda OEM, 14781-HA0-770, XC110, 519-CVV2220C, Secure your Honda's valvetrain with BPRATV's Valve Keeper Cotters Set of 8! Direct OEM replacement f...

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$369.99
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$298.88
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$298.88

Honda TRX400EX 400X XR400 OEM Stock Bore Kit 85mm Wiseco Piston & Cometic Gasket

BPRATV
Out of stock

4606M08500 / C7825 / 400EX-CYL85, 3P-400, 12100-KCY-670,1043-2, M2002, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY...

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$21.77
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$21.77
$18.88
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$18.88

Cylinder Head Valve Cover Metal Gasket for Honda TRX 400EX TRX400X 12391-KCY-671

BPRATV
In stock

12391-KCY-671,VC03201,XG119,CRUGVKCY,C7826, C7825, 12251-KCY-671, 12191-KCY-671, 91302-356-000, 18291-MN5-650, 14523-KBB-901, 91301-200-000, 91306-...

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1996-2014 Honda Cylinder Head Valve Cover Gasket XR400R TRX 400X TRX400EX 400EX

BPRATV
In stock

12391-KCY-671,VC03201,XG119,CRUGVKCY,C7826, C7825, 12251-KCY-671, 12191-KCY-671, 91302-356-000, 18291-MN5-650, 14523-KBB-901, 91301-200-000, 91306-...

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1996-2014 Honda Cylinder Head Valve Cover Gasket XR400R TRX 400EX 12391-KCY-671

BPRATV
In stock

12391-KCY-671,VC03201,XG119,CRUGVKCY,C7826, C7825, 12251-KCY-671, 12191-KCY-671, 91302-356-000, 18291-MN5-650, 14523-KBB-901, 91301-200-000, 91306-...

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$18.88
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$18.88

Steel Valve Cover Gasket Honda TRX400EX TRX400X XR400R OEM Upgrade 12391‑KCY‑671

BPRATV
In stock

12391-KCY-671,VC03201,XG119,CRUGVKCY,C7826, C7825, 12251-KCY-671, 12191-KCY-671, 91302-356-000, 18291-MN5-650, 14523-KBB-901, 91301-200-000, 91306-...

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$999.99
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$648.88
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$648.88

Honda TRX 400EX 85mm Stock Cylinder Crank Wiseco Piston Engine Rebuild Kit 99-04

BPRATV
Out of stock

WPC131A, 4606M08500, CBK0080, C7826, K014, B5047,4040, K014, B5047,4040, C7825, 808894, 822278, 4040, CBK0016, C7826, 12100-KCY-670, 4606M08500, C7...

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$459.99
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$459.99
$398.88
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$398.88

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

JE Pistons
Low stock

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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$459.99
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$398.88
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$398.88
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$480.78
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$480.78
$388.88
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$388.88

TRX400EX 400EX 400X 88mm Big Bore Cylinder JE Piston Cometic Top End Rebuild Kit

JE Pistons
Out of stock

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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$480.78
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$480.78
$424.44
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$424.44

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

JE Pistons
Low stock

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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$424.44
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$1,684.22
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$1,684.22
$999.98
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$999.98

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

BPRATV
Out of stock

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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$999.98
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$1,684.22
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$1,684.22
$999.98
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$999.98

Honda TRX400EX Assembled Cylinder Head Stage 2 Hot Cams Chain Cometic Gasket Kit

BPRATV
Out of stock

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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$479.99
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$479.99
$388.88
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$388.88

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

BPRATV
Low stock

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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$479.99
$388.88
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$388.88
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$43.98
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$43.98
$31.19
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$31.19

Honda 400EX 400X XR400R BPRATV Stronger Heavy Duty Exhaust Head Pipe Studs Bolts

BPRATV Talon Titanium
In stock

92900-08022-0B, 90301-HM8-000, 18291-MN5-650Give your Honda 400EX 400X XR400R a performance upgrade with this complete exhaust stud kit that boosts...

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$43.98
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$31.19
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$31.19
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$469.99
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$469.99
$398.88
$398.88 - $398.88
$398.88

TRX 400EX TRX400EX 400X 88mm 88 426cc Big Bore Cylinder 10:1 Top End Rebuild Kit

BPRATV
In stock

1043-2, M2008, 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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$469.99
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$34.42
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$30.88
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$30.88

TRX 400EX 400X Sportrax 87mm 89mm Big Bore Head Gasket Cometic +4 Cylinder Top

Cometic Gaskets, Cometic, BPRATV, Honda TRX400EX
In stock

Cometic MLS head gasket for Honda TRX400EX, TRX400X, XR400R big bore engines. Supports 87–89mm bores with race-proven sealing. Cometic Honda TRX...

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$44.99
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Honda 400EX XR400 87mm 416cc Big Bore Wiseco Replacement Piston Rings Set 3425XC

Wiseco
In stock

Honda 400EX / 400X / XR400 87mm Wiseco Big Bore Piston Replacement Rings KitPart# 3425XCThese rings are for Wiseco Piston Part #'s 4606M08700, 4628...

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$34.99
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$1,119.99
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$1,119.99
$768.99
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$768.99

99-04 400EX 400 EX BPR Stock Simple Rebuild Kit CP Piston Complete Gaskets Seals

BPRATV
In stock

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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$1,119.99
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$1,119.99
$768.99
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$644.99
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$644.99
$545.49
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$545.49

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

Hot Cams
In stock

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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$644.99
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$644.99
$545.49
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$545.49
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$699.99
$729.99
$729.99 - $729.99
$729.99

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

BPRATV
In stock

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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$699.99
$729.99
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$729.99
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$604.99
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$604.99
$424.44
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$424.44

TRX 400EX 400X Top End Rebuild Kit Stock Bore Cylinder Piston 85mm Assembly Part

BPRATV
Out of stock

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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$604.99
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$424.44
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$424.44
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$999.99 - $999.99
$999.99
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$999.99

TRX 400EX 400X Port Ported Assembled Head Porting Assembly Valves

BPRATV
In stock

FITS ALL XR400R TRX400EX and TRX400X MODELS PHOTO IS NOT A STOCK IMAGE.  IT IS EXACTLY WHAT YOUR HEAD WILL LOOK LIKE.  THE PORTING IS EXACTLY THE ...

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$1,799.99
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$1,599.99
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$1,599.99

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

BPRATV
In stock

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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$604.99
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$199.99
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$199.99

400EX 400X TITANIUM Cylinder Head Studs Ti Crankcase to Cylinder Both Kits Kit

BPRATV Talon Titanium
In stock

Complete kit for cylinder to crankcases and cylinder to head All Grade 5 Titanium alloy stud nut and washer kit Heat treated, allen head studs 12 p...

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$604.99
$199.99
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$199.99
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$571.99
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$44.99
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$44.99

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

SKF
Low stock

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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$571.99
$44.99
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$44.99
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$1,699.99
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99-04 TRX400EX TRX 400EX 416 Big Bore Complete Motor Rebuild Valves Hotcams 87mm

BPRATV
Out of stock

4040, CBK0080,4606M08700, TBK0011,C7826, K014, 808894, 4628M08700, 1051-3, 30-3111, 30-3115, 30-3117,8604D200, 133889, M2001,WPC131A ,WPC131B, CBK0...

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$149.99
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$149.99
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Get Honda 400EX Sportrax TITANIUM Head Studs 400X TI Cylinder Head Stud Bolt Kit

BPRATV
In stock

FITS ALL HONDA TRX400EX, 400X AND XR400R MODELS AND YEARS All Grade 5 Titanium Alloy cylinder head stud kit Allen head, heat treated studs 12 poin...

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$799.99
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99-04 400EX Sportrax Crank Bottom End Rebuild Crankshaft Motor Engine Assembly

BPRATV
In stock

FITS ALL HONDA 400EX 400X AND XR400R MODELS AND YEARS Hotrods or Wiseco crankshaft assembly with rod Complete gasket kit MLS head gasket  Oil seal...

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$33.34
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$33.34
$26.68
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Best Honda TRX400EX TRX 400EX Head Gasket Cometic OEM Stock Bore MLS Gasket USA

Cometic Gaskets
In stock

Cometic MLS head gasket for Honda TRX400EX TRX400X XR400R. .027 thickness, 85-86mm bore. Durable USA-made gasket for reliable engine sealing. Com...

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Honda TRX400EX 400EX 85mm OEM Stock Bore Cometic MLS Head Gasket 12251-HN1-A41

Cometic Gaskets
In stock

Durable MLS gasket for Honda TRX400EX XR400R TRX400X. .027 thickness, 85-86mm bore, reliable performance upgrade. Cometic Honda TRX400EX TRX400X ...

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$26.68
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$243.10
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$188.88
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Honda TRX 400EX XR400 Kibblewhite Valve Spring Kit Bronze Valve Guides RED Seals

Kibblewhite Precision
In stock

Complete Kibblewhite Titanium Valve Spring Kit with Bronze Guides and RED Viton Seals for Honda TRX400EX, 400X, and XR400. USA-made performance upg...

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Honda 400EX 400X Wiseco 88mm 426 Big Bore Cylinder 11:1 Piston Top Gasket Kit US

Wiseco
Out of stock

4628M08800, C7826, 4606M08800, 8604D300, 4606M08800, 177240, 177239, Upgrade your Honda 400EX, 400X, or XR400R with this Wiseco 88mm 426cc Big Bore...

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$218.88
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$257.88
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05-14 Honda TRX400EX Wiseco Forged Clutch Basket Fibers Springs & Steels Kit NEW

BPRATV
Out of stock

Wiseco, WPP3043, 22100-HN1-A40, 22201-MAL-600, 22321-MV4-000, 22401-HN1-000, Upgrade your 05-14 (Honda TRX400EX/400X with a Wiseco Forged Clutch Ba...

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$257.88
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Honda TRX400EX 400X 85mm 400cc Stock Bore Top End Rebuild Kit Wiseco Cometic NEW

BPRATV
Out of stock

4606M08500 / C7825 / 400EX-CYL85, 3P-400, 12100-KCY-670,1043-2, M2002, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY...

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$298.88
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$444.68
$398.88
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Honda XR400 TRX 400EX 87mm 416cc Big Bore Top End Rebuild Kit Wiseco 10:1 Piston

BPRATV
In stock

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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