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

BPRATV
In stock

12100-KCY-670, 12191-KCY-672, 13011-KCY-670, 13101-KCY-670, 90601-KA5-000, 13111-KCY-670, 12100-HN1-A70, 12191-KCY-672, 12251-HN1-003, 12391-KCY-67...

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$424.44
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400EX 400X 89mm Hi Comp Big Bore Kit Race Gas 12.5:1 Piston +4 Rebuild 440cc Kit

BPRATV
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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$34.99
$34.99
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$34.99

400EX 400X Valve Spring Seats Base Washers Steel Copper Wave Washer Head Rebuild

BPRATV
In stock

WORKS ON ALL HONDA 400EX 400X AND XR400R MODELS AND YEARS!If you bought a so-called "complete" head rebuild kit online unless it was from us it is ...

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$34.99 - $34.99
$34.99
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$34.99
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$303.39
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$303.39
$257.88
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$257.88

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

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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$1,299.99
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$1,299.99
$999.98
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$999.98

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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$940.84
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$940.84
$599.98
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$599.98

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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$603.90
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$415.76
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$415.76

TRX 400EX XR 400X Crank Bearings Hotrods Replacement Crankshaft Main Bearing Kit

BPRATV
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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$415.76
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$415.76
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$529.00
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$417.77
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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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$529.00
$417.77
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$417.77
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$999.99
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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
Low 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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$1,147.48
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$1,147.48
$840.12
$840.12 - $840.12
$840.12

Honda TRX400EX TRX 400EX Assembled Cylinder Head Camshaft Chain Kit Cam Bearings

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-HA0-770, ...

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$840.12
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$124.99
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$88.88
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$88.88

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

BPRATV
Low 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
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$124.99
$88.88
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$88.88
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$725.00
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$725.00
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$625.00

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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$725.00
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$725.00
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$625.00
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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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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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$999.99
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$699.98
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$799.99
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$799.99
$699.99
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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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$799.99
$699.99
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$699.99
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$1,299.99
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$1,299.99
$1,098.88
$1,098.88 - $1,098.88
$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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$1,299.99
$1,098.88
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$1,098.88
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$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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$489.98
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$299.99
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$299.99
$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
$258.88
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$258.88
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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
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$417.77
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Save 20% Save %
$486.10
$486.10 - $486.10
$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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$579.99
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$479.99
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Save 8% Save %
$599.99
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$599.99
$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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$599.99
$549.99
$549.99 - $549.99
$549.99
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Save 23% Save %
$1,004.84
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$1,004.84
$769.89
$769.89 - $769.89
$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
$769.89 - $769.89
$769.89
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Save 14% Save %
$299.99
$299.99 - $299.99
$299.99
$258.88
$258.88 - $258.88
$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
$258.88 - $258.88
$258.88
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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
$424.44 - $424.44
$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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$999.99
$999.99 - $999.99
$999.99
$699.98
$699.98 - $699.98
$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
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$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
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$489.99
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$1,264.95
$1,264.95 - $1,264.95
$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
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$1,264.95
$499.99
$499.99 - $499.99
$499.99
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$199.99
$199.99 - $199.99
$199.99
$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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$199.99
$199.99 - $199.99
$199.99
$195.00
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$195.00
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$1,799.99
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$1,799.99
$1,699.99
$1,699.99 - $1,699.99
$1,699.99

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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$1,799.99
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$1,799.99
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$1,699.99
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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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$149.99
$105.99
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$105.99
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$1,294.11
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$1,294.11
$1,099.99
$1,099.99 - $1,099.99
$1,099.99

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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$1,294.11
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$1,294.11
$1,099.99
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$1,099.99
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$706.66
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$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
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$706.66
$599.99
$599.99 - $599.99
$599.99
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$36.00
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$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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$369.99
$369.99 - $369.99
$369.99
$298.88
$298.88 - $298.88
$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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$369.99
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$369.99
$298.88
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$298.88
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$21.77
$21.77 - $21.77
$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
$18.88 - $18.88
$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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$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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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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$999.99
$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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$999.98
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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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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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$388.88
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Honda TRX 400EX X Top End Rebuild Repair Kit CP Carrillo Piston Gaskets Cylinder

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

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

BPRATV
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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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$729.99
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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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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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