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

BPRATV
In stock

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

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TRX400EX TRX 400X XR 400R 400EX Stage 2 Two Hotcam Hot Cam Camshaft Timing Chain

Hot Cams
Low stock

Honda 400EX 400X XR400R Stage 2 Hotcam + BPRATV HD Chain kit delivers increased top-end power, stronger reliability, and direct bolt-on fitment. ...

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$303.39
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$257.88
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Honda TRX 400EX 400X Wiseco Heavy Duty Forged Clutch Basket Kit 2005-2014 BPRATV

BPRATV
Low 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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Honda 400EX XR400R Cylinder Head Assembly Top End Rebuild Kit Valves Rocker Arms

BPRATV
Out of stock

Complete Top End Rebuild Kit with New Assembled Cylinder Head NEW after market 85mm, stock bore cylinder Wiseco or Wossner forged piston** Nitrite ...

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$383.95
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$383.95

Honda TRX400EX 400X XR400 Hot Cams Stage 2 Two Camshaft Mid Top End Power Boost!

Hot Cams
Low stock

1043-2, 14000-HN1-A70, 14000-HN1-000, 1007-1, 1051-3, 1043-2, 14000-KCY-670, 14000-HN1-A70, 14401-KCY-671, 91002-MN1-671, 91003-KF0-008 💥 Honda T...

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$940.84
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$599.98
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99-04 TRX 400EX Stroker Crank Rebuild Kit Hotrods 4mm Crankshaft Bottom End Part

BPRATV
Low stock

FITS ALL '99-04 HONDA 400EX MODELSHot Rods +4mm crankshaft with rod assembledSKF heavy duty replacement crank bearingsComplete gasket kitMLS head g...

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$124.99
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$89.88
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$89.88

400EX 400X XR400R Ti Cylinder Case Studs Titanium Crankcase Stud Upgrade Kit Set

BPRATV Talon Titanium
In stock

BPRATV - The Original Trailblazer for Titanium Hardware in the ATV Industry. THESE STUDS ARE TO MOUNT THE CYLINDER ON TO THE CASES.  THEY ARE NOT H...

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$184.88
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$184.88

Honda TRX 400EX 400X 85mm Stock Bore 10:1 Piston Cometic MLS Top End Gasket Kit

Wiseco
Out of stock

12100-KCY-670, 4606M08500, C7825, 12191-KCY-673, 13011-KCY-670, 90601-KA5-000, 13103-KCY-670, 13111-KCY-670, 12251-HN1-003, PK1031Brand New Wiseco ...

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$417.77

Honda XR400R XR 400EX 89mm 89 440cc Big Bore Top End Rebuild Kit Cylinder Wiseco

BPRATV
In stock

4667M08900, 8604D400, 247612, M2033, 1043-2, M2008, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, 30-33750, 130...

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99-04 Honda 400EX 400X Hot Rods Bottom End Crank Rod Rebuild Kit Gaskets Seals

Hot Rods
Out of stock

13000-MBV-730, 4040, 808829, 822139, K014, Hot Rods Wiseco, WPC131A,12191-KCY-673, 13011-KCY-670, 90601-KA5-000,13103-KCY-670, 13111-KCY-670, 12251...

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$99.99
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$73.49
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$73.49

TRX 400EX 400X Crank Bearings SKF Aftermarket Crankshaft Main Bearing Left Right

SKF
In stock

Honda OEM 91001-KF0-018, K014, B5047, 23.CBS14096, TM-SC0692C3Bulletproof Your Honda 400EX/400X Crankshaft with SKF Crank BearingsFits All Honda TR...

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$680.81
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$680.81
$448.89
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$448.89

TRX400EX 400EX 400X 89mm 89 mm 440cc CP Big Bore Cylinder Top End Kit Head Studs

CP-Carrillo
In stock

M2033,4667M08900,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, 30-33750, 13011-KCY-670, 90601-KA5-000, 13103-KCY-670, 13111-KCY-670, 12...

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TRX 400EX 400X Assembled Head Assembly Complete Valves Valve Cover Spring Rocker

BPRATV
In stock

30-3111, 30-3115, 30-3117, 14411-KCY-670, 14421-KCY-670, 14431-KCY-670, 14445-KF0-000, 14446-KF0-000, 14447-KF0-000, 14451-MBV-000, 14455-KCY-670, ...

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$1,098.88
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$1,098.88

400EX Ported Cylinder Head Porting Assembled +1 Valves Kibblewhite 1mm Valve Kit

BPRATV
In stock

Brand new aftermarket cylinder head and valve cover Full race port and polish - intake, exhaust, combustion chamber Valve guides cut Pocket port ...

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$21.99
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$18.99
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$18.99

99+ Honda TRX400EX TRX 400EX 400X Head Valve Stem Guide Seals RED Seals Set of 4

Kibblewhite Precision
In stock

Complete Set of Kibblewhite Hi-Temp RED Viton Valve Stem Seals (4)Fits Honda TRX 400EX, 400X and XR400 ALL YEARS!Better then OEM for Less $$$!!Repl...

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$18.99
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$869.89
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$869.89

400EX 400X TRX400EX 87mm Big Bore Kit Stage 2 Hot Cams Camshaft Complete Top End

BPRATV
In stock

3P-416, 4606M08700, 4628M08700, 8604D200, 133889, M2001, 71016-4, C7826, 1043-2, 91002--MN1-671, 12100-HN1-A70, 12191-KCY-672, 13011-KCY-670, 13101...

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$299.99
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$268.88
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$268.88

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

BPRATV, SKF, Talon, Honda TRX400EX TRX 400EX 400X XR400R
In stock

4606M08500, C7825, 1051-3, 12100-KCY-670, 71016-4,4667M08900, 1043-2, C7826, 1051-3, 12100-KCY-670, 71016-4, 13111-KCY-670, 4606M08500, C7826, 7101...

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$605.79
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$434.44
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$434.44

TRX400EX 400EX 400X 89mm 440cc Big Bore Cylinder JE 11:1 Piston Cometic Top Kit

JE Pistons
Out of stock

247612, 4667M08900, 4794M08900,1043-2, M2002, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, 30-33750, 13011-KCY...

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$480.78
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$480.78
$424.44
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$424.44

TRX 400EX 400X XR400 88mm Big Bore Cylinder 13:1 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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$615.95
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$583.91
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99-04 Honda TRX400EX 400EX Hot Rods Hotrods Bottom End Rebuild Kit Crank Gaskets

Hot Rods
Out of stock

13000-MBV-730, 4040, 808829, 822139, K014, Hot Rods Wiseco, WPC131A,12191-KCY-673, 13011-KCY-670, 90601-KA5-000,13103-KCY-670, 13111-KCY-670, 12251...

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$39.99
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$39.99
$29.98
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$29.98

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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$119.99
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$119.99
$99.98
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$99.98

99-14 TRX400EX TRX 400EX TITANIUM Cylinder Head Valve Cover Bolt Kit Cam Bolts

BPRATV Talon Titanium
In 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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$374.99
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$223.41
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$223.41

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

Kibblewhite Precision
In stock

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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$51.46
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$51.46
$36.89
$36.89 - $36.89
$36.89

Honda 400EX XR400 89mm 440cc Big Bore Wiseco Piston Replacement Rings Set 3504XC

Wiseco
In stock

Honda 400EX / 400X / XR400 89mm Wiseco Big Bore Piston Replacement Rings KitPart# 3504XCThese rings are for Wiseco Piston Part #'s 4667M08900 &...

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$276.00
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$276.00
$186.97
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$186.97

TRX400EX TRX 400EX XR400 Wiseco 88 mil 88mm Piston +3 Big Bore 426 4606M08800

Wiseco
Out of stock

FITS ALL HONDA TRX400EX, 400X MODELS AND YEARS Includes one 88mm 10:1 Wiseco piston with rings, pin, and clips for all 400EX/X/XR models and years...

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$124.99
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$124.99
$88.88
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$88.88

TRX 400EX 400X XR400 Ti Cylinder Case Studs 90085-KCY-670 TITANIUM Stud Bolt Kit

BPRATV
In stock

BPRATV - The Original Trailblazer for Titanium Hardware in the ATV Industry. FITS ALL HONDA TRX400EX, 400X, AND XR400R MODELS AND YEARSTHESE STUDS ...

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$124.99
$88.88
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$88.88
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$992.49
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$992.49
$887.49
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$887.49

TRX 400EX 400X Assembled Head Complete Assembly Valves Rockers Stage 2 Hotcam

BPRATV
In stock

FITS ALL HONDA 400EX 400X XR400R MODELS AND YEARS All parts are aftermarket Cylinder head assembly Valve cover assembly Valves, springs, rocker ar...

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$992.49
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$992.49
$887.49
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$887.49
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$706.66
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$706.66
$599.99
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$599.99

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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$21.77
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$18.88
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$18.88

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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$18.88
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$21.77
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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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$18.88
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Save 21% Save %
$489.99
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$489.99
$388.88
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$388.88

Honda TRX 400EX 400X Top End Rebuild Kit 11:1 CP Piston Cometic Gaskets Cylinder

CP-Carrillo
In stock

400EX-CYL85 M2002 400EX-TEG DPR8Z, 810894, M2003,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, 13011-KCY-670, 90601-KA5-000, 13103-KCY-...

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$489.99
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$489.99
$388.88
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$388.88
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Save 30% Save %
$699.99
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$699.99
$489.98
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$489.98

TRX400EX TRX 400EX Big Bore 89m 440 Wiseco 12.5:1 Top End Rebuild Kit Head Studs

BPRATV
In stock

247612, 4667M08900, 4794M08900,1043-2, M2002, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, 30-33750, 13011-KCY...

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$699.99
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$699.99
$489.98
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$489.98
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Save 25% Save %
$39.99
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$39.99
$29.98
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$29.98

TRX 400EX 400X Cam Bearings OEM Aftermarket Bearing 91002-MN1-671 91003-KF0-008

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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$39.99
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$39.99
$29.98
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$29.98
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$149.99
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$149.99
$108.88
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$108.88

Honda TRX 400EX 400X Cylinder Head Studs Titanium Ti Head Stud Bolt Nut Kit Set

BPRATV Talon Titanium
In stock

3PHD, 30-33750, 90085-KCY-670, 90083-KG0-981BPRATV TALON TITANIUM Extreme Heavy Duty Cylinder Head Stud KitHonda 400EX, 400X, & XR400R Years 19...

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$149.99
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$149.99
$108.88
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$108.88
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$605.79
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$605.79
$424.44
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$424.44

Honda TRX400EX 400EX 400X XR400 89mm 440 JE Cometic 10.8:1 Cylinder Big Bore Kit

JE Pistons
In stock

247612, 4667M08900, 4794M08900,1043-2, M2002, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, 30-33750, 13011-KCY...

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$605.79
$424.44
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$424.44
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$529.00
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$529.00
$417.77
$417.77 - $417.77
$417.77

Honda XR400 XR 400EX 89mm 89 440 Big Bore Top End Rebuild Kit Cylinder Wiseco

BPRATV
In stock

4667M08900, 8604D400, 247612, M2033, 1043-2, M2008, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, 30-33750, 130...

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$529.00
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$529.00
$417.77
$417.77 - $417.77
$417.77
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Save 7% Save %
$33.34
$33.34 - $33.34
$33.34
$30.88
$30.88 - $30.88
$30.88

Honda TRX400EX 400EX 87 88mm 89mm Big Bore Cometic MLS Head Gasket 12251-HN1-A41

Cometic Gaskets
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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$33.34
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$33.34
$30.88
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$30.88
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$281.46
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$281.46
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$208.89 - $208.89
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Honda 400EX 400X Wiseco 85mm Stock Bore 11:1 Piston COMETIC Top End Gasket Kit

Wiseco
Out of stock

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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$281.46
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$208.89
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$208.89
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$79.95
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$79.95
$71.99
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$71.99

Wiseco OEM Extreme Heavy Duty Timing Cam Chain Honda TRX400EX TRX 400EX 400X JPN

Wiseco
In stock

HC82RH2010112,CC004,14401-KCY-671,31.1496,SCA0409SV112Wiseco, Direct OEM Replacement Cam Chain, XR400R ’96-04 / TRX400EX / X ’99-14 A critical comp...

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$71.99
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$151.99
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$151.99
$124.98
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$124.98

99-14 TRX400EX 400EX TITANIUM Cylinder Head Valve Cover Bolts & EXHAUST STUD KIT

BPRATV Talon Titanium
In 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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$999.99
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$999.99
$639.98
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05-14 Honda 400EX 400X Wiseco Crank Rod Motor Rebuild Repair Kit Piston Gaskets

Wiseco
In 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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$999.99
$639.98
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$1,264.95
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$499.99
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TRX400EX TRX 400EX Stage 1 Hotcam Hot Cam Valves Springs Chain Head Rebuild Kit

BPRATV
Low 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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$499.99
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$579.99
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$479.99
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$479.99

TRX 400EX 400X XR 416 Big Bore Kit 87 mil Cylinder +2 Complete Top End Rebuild

BPRATV
Low stock

Compatible Vehicles Submodel Year Make Model TRX400EX 2x4 2008 Honda Sportrax 400 TRX400EX 2x4 2007 Honda Sportrax 400 TRX400EX 2x4 200...

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$599.99
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$595.00
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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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$599.99
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$549.99
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TRX 400X 400EX Stage 2 Hotcam Rocker Arms Valves TRULY COMPLETE Head Rebuild Kit

BPRATV
In stock

FITS ALL HONDA TRX400EX, 400X, AND XR400R MODELS AND YEARS - ALL OTHER KITS YOU SEE ARE MISSING IMPORTANT PARTS YOU MUST HAVE TO REBUILD YOUR HEAD....

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$1,599.99
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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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$33.34
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$33.34
$26.68
$26.68 - $26.68
$26.68

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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$33.34
$26.68
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$1,004.84
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$1,004.84
$769.89
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TRX400EX TRX 400EX Big Bore Kit Stage 2 Hotcam 87mm +2 Cylinder Hotcams Camshaft

BPRATV
In stock

Upgrade your Honda TRX400EX or TRX400X with the BPRATV 87mm Big Bore Kit and Hotcams Stage 2 Camshaft. Includes forged piston, titanium studs, and ...

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