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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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TRX 400EX 400X Assembled Head Assembly Complete Std Valve Springs Rocker Arms

BPRATV
In stock

FITS ALL XR400R TRX400EX and TRX400X MODELS New aftermarket cylinder head and valve cover Valve springs, retainers, and collars Standard replaceme...

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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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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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$799.99
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$699.99

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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$799.99
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$1,299.99
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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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$1,299.99
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$1,098.88
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$21.99
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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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$489.99
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$388.88

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

CP-Carrillo
Low 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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$388.88
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$699.99
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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
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$489.98
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$299.99
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$258.88
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$258.88

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

BPRATV
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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$299.99
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$258.88
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$529.00
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$529.00
$417.77
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$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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$33.34
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$30.88
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$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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$30.88
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$79.95
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$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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$79.95
$71.99
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$119.99
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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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$119.99
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$119.99
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$151.99
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$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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$151.99
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$151.99
$124.98
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$124.98
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$486.10
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$486.10
$388.88
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$388.88

Honda 400EX 400X Top End Rebuild Kit 85mm Stock Bore Cylinder JE CP Piston Studs

BPRATV
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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$486.10
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$486.10
$388.88
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$388.88
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$579.99
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$579.99
$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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$579.99
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$599.99
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$549.99
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$549.99

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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$599.99
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$1,004.84
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$1,004.84
$769.89
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$769.89

TRX400EX TRX 400EX Big Bore Kit Stage 2 Hotcam 87mm +2 Cylinder Hotcams Camshaft

BPRATV
Low 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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$1,004.84
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$1,004.84
$769.89
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$619.99
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$490.16
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$490.16

TRX 400EX 400X Hot Rods Crank Bearings Hot Rods Rod Crankshaft Main Bearing Kit

Hot Rods
In stock

Hot Rods Crank, 4040, 13000-MBV-730,4040,K014,91001-KF0-018,13000MBV730,91001KF0018Premium Hot Rods Crankshaft & SKF Main Bearing Kit for Honda...

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$619.99
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$619.99
$490.16
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$490.16
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$39.99
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$39.99
$29.98
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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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$299.99
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$299.99
$258.88
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$258.88

TRX 400EX 400X XR 400R Stock Cylinder Piston Top End Rebuild Kit Performance Cam

BPRATV
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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$299.99
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$299.99
$258.88
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$258.88
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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
Low 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
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$605.79
$424.44
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$424.44
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$605.79
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$605.79
$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
Low 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
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$605.79
$434.44
$434.44 - $434.44
$434.44
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$459.99
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$459.99
$398.88
$398.88 - $398.88
$398.88

TRX400EX 400EX 400X XR400 87mm 87 416cc JE Cometic 10.8:1 Cylinder Big Bore 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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$459.99
$398.88
$398.88 - $398.88
$398.88
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$459.00
$459.00 - $459.00
$459.00
$424.44
$424.44 - $424.44
$424.44

TRX 400EX 400X 87mm Big Bore Cylinder 12:1 JE Piston Cometic Top End Rebuild Kit

BPRATV
Low stock

199656, 1043-2, M2002, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, 30-33750, 13011-KCY-670, 90601-KA5-000, 13...

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$459.00
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$459.00
$424.44
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$424.44
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Save 8% Save %
$459.00
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$459.00
$424.44
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$424.44

Honda TRX400EX 400EX 400X XR400 87mm 416cc JE Cometic 12:1 Cylinder Big Bore Kit

BPRATV
Low stock

199656, 1043-2, M2002, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, 30-33750, 13011-KCY-670, 90601-KA5-000, 13...

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$459.00
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$459.00
$424.44
$424.44 - $424.44
$424.44
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$459.99
$459.99 - $459.99
$459.99
$398.88
$398.88 - $398.88
$398.88

TRX400EX 400EX 400X 87mm Big Bore Cylinder 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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$459.99
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$459.99
$398.88
$398.88 - $398.88
$398.88
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$999.99
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$999.99
$699.98
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$699.98

99-08 Honda Sportrax 400 TRX400X TRX400EX Completely ASSEMBLED Cylinder Head Kit

BPRATV
In 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-HA0-7...

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$999.99
$999.99 - $999.99
$999.99
$699.98
$699.98 - $699.98
$699.98
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Save 29% Save %
$687.49
$687.49 - $687.49
$687.49
$489.99
$489.99 - $489.99
$489.99

Best 05+ TRX 400EX 400X Bottom End Rebuild Kit Crank Shaft Motor Engine Assembly

BPRATV
In stock

COMPLETE BOTTOM END REBUILF FOR HONDA TRX 400EX!Compatible with all 2005+ Honda 400EX and 400X models!A Great & Affordable Complete Bottom End ...

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$687.49
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$687.49
$489.99
$489.99 - $489.99
$489.99
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Save 25% Save %
$39.99
$39.99 - $39.99
$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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$39.99
$39.99 - $39.99
$39.99
$29.98
$29.98 - $29.98
$29.98
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Save 17% Save %
$119.99
$119.99 - $119.99
$119.99
$99.98
$99.98 - $99.98
$99.98

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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$119.99
$119.99 - $119.99
$119.99
$99.98
$99.98 - $99.98
$99.98
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$449.99
$449.99 - $449.99
$449.99
$394.98
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$394.98

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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$449.99
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$449.99
$394.98
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$394.98
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$1,264.95
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$1,264.95
$499.99
$499.99 - $499.99
$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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$1,264.95
$1,264.95 - $1,264.95
$1,264.95
$499.99
$499.99 - $499.99
$499.99
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Save 1% Save %
$599.99
$599.99 - $599.99
$599.99
$595.00
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$595.00

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
$599.99 - $599.99
$599.99
$595.00
$595.00 - $595.00
$595.00
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Save 15% Save %
$706.66
$706.66 - $706.66
$706.66
$599.99
$599.99 - $599.99
$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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$706.66
$706.66 - $706.66
$706.66
$599.99
$599.99 - $599.99
$599.99
Save 15% Save %
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$102.99
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$102.99
$89.98
$89.98 - $89.98
$89.98

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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$102.99
$102.99 - $102.99
$102.99
$89.98
$89.98 - $89.98
$89.98
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$149.99
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$149.99
$108.88
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$108.88

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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$149.99
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$149.99
$108.88
$108.88 - $108.88
$108.88
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$36.00
$36.00 - $36.00
$36.00
$28.81
$28.81 - $28.81
$28.81

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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$36.00
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$36.00
$28.81
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$28.81
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$21.77
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$21.77
$18.88
$18.88 - $18.88
$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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$21.77
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$21.77
$18.88
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$18.88
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$21.77
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$21.77
$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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$21.77
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$21.77
$18.88
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$18.88
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$21.77
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$21.77
$18.88
$18.88 - $18.88
$18.88

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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$21.77
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$21.77
$18.88
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$18.88
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$21.77
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$21.77
$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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$21.77
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$18.88
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$18.88
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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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$398.88
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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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$480.78
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$424.44
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$424.44
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$479.99
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$479.99
$388.88
$388.88 - $388.88
$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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$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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$31.19
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$31.19
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$469.99
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$469.99
$398.88
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$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
$398.88
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$398.88
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