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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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$384.99
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$384.99
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$139.99

TRX400EX TRX 400EX 400X Carb Kit Carburetor Intake Filter Cable Complete Stock

BPRATV
In stock

FITS  ALL 400EX, 400X, AND XR400R MODELS AND YEARS After market OEM replacement carb Hi flow K&N stylep air filter with clamp Terrycable or Mot...

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$384.99
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$139.99
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$699.98

BEST Honda TRX400EX TRX 400EX Complete ASSEMBLED Cylinder Head Kit 12200-KCY-670

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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$369.99
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$369.99
$298.88
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$298.88

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

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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$369.99
$298.88
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$298.88
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$923.99
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$923.99
$885.27
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$885.27

Honda 400EX 400X 87mm Big Bore Kit Valves Springs Stage 2 Hotcam +2 416c Top End

BPRATV
Low stock

The Best Big Bore Honda TRX400EX Top End Rebuild You will find. BPRATV 87mm Big Bore Cylinder (1 Year Warranty) Wiseco or Wossner forged piston Hi ...

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$885.27
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$885.27
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$49.99
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$34.99
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$34.99

Best Honda TRX 400EX 400X Heavy Duty Cam Chain Timing Chain Conversion Stronger

BPRATV
In stock

14620-KCY-670, 14511-KCY-670, 14401-KCY-671, 14520-KCY-671,CC004,HC82RH2010112BPRATV Talon heavy-duty conversion timing chainMuch stronger than any...

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$34.99
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$34.99
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$349.99
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$349.99
$299.99
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$299.99

99-04 400EX Main Crank Trans Bearings Complete Motor Transmission Bearing Kit

BPRATV
In stock

WORKS ON ALL '99-04 HONDA TRX 400EX MODELS Crankshaft main bearings Crank balancer bearings Transmission bearings Starter needle bearing Clutch be...

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$349.99
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$349.99
$299.99
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$299.99
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$369.99
$369.99 - $369.99
$369.99
$298.88
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$298.88

Honda TRX400EX XR 400X Top End Rebuild Repair Kit Wiseco Piston Gaskets Cylinder

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, PK1031Complete Standard...

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$369.99
$298.88
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$298.88
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$94.99 - $94.99
$94.99
$102.88
$102.88 - $102.88
$102.88

TRX400EX 400EX Timing Guides Guide Tensioner Chain Tensioner HOTCAMS Cam Chain

Hot Cams
In stock

HC82RH2010112, 14620-KCY-670, 14511-KCY-670, 14401-KCY-671, ProX, 31.1496, Wiseco, CC004, D.I.D, SCA0409SV112FITS ALL HONDA 400EX 400X XR400R MODEL...

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$94.99
$102.88
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$102.88
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$216.71
$216.71 - $216.71
$216.71
$174.99
$174.99 - $174.99
$174.99

Honda 400EX 400X Wiseco Piston Top End Gaskets Stock Replace Hi Comp Pump Gas

Wiseco
Out of stock

Works on all Honda 400EX, 400X, and XR400R models and years Wiseco 85mm 10:1 forged piston Nitrite coated piston rings Chrome wristpin Circlips T...

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$216.71
$216.71 - $216.71
$216.71
$174.99
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$174.99
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$149.99
$149.99 - $149.99
$149.99
$108.88
$108.88 - $108.88
$108.88

Best Honda TRX 400EX 400X XR400 Head Bolts Studs TITANIUM Cylinder Head Stud Kit

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
$108.88
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$108.88
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$46.80
$46.80 - $46.80
$46.80
$38.88
$38.88 - $38.88
$38.88

Honda TRX 400EX XR400 400X 416 440 Cometic Top End Gasket Kit C7826 89mm MLS USA

Cometic Gaskets
Out of stock

C7826, C7825, 12251-KCY-671, 12191-KCY-671, 91302-356-000, 18291-MN5-650, 14523-KBB-901, 91301-200-000, 91306-MG3-000, 91301-679-003, 18291-MN5-650...

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$46.80
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$46.80
$38.88
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$38.88
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$966.06
$966.06 - $966.06
$966.06
$769.89
$769.89 - $769.89
$769.89

Honda 400EX 87m Big Bore Kit Stage 2 Hot Cams +2 Cylinder Piston 416 Top End Kit

BPRATV
Low stock

Best Honda TRX400EX Big Bore Top End Rebuild Kit Online, 1043-2, M2008, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, ...

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$966.06
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$966.06
$769.89
$769.89 - $769.89
$769.89
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$119.99
$119.99 - $119.99
$119.99
$99.98
$99.98 - $99.98
$99.98

99-04 TRX400EX TRX 400EX TITANIUM Cylinder Head Valve Cover Bolt Kit Ti Hardware

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
$119.99 - $119.99
$119.99
$99.98
$99.98 - $99.98
$99.98
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$418.96
$418.96 - $418.96
$418.96
$408.88
$408.88 - $408.88
$408.88

TRX 400EX 400X Stage 1 Hotcam Hot Cams Camshaft Bearings HD Chain Conversion Kit

Hot Cams
Low stock

1007-1,1043-2,14000-HN1-A70, 14401-KCY-671, 91002-MN1-671, CC004, HC82RH2010112, 31.1496,SCA0409SV112,91003-KF0-008Brand New Hotcams Stage 1 Camsh...

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$418.96
$418.96 - $418.96
$418.96
$408.88
$408.88 - $408.88
$408.88
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$496.85
$496.85 - $496.85
$496.85
$359.36
$359.36 - $359.36
$359.36

TRX 400EX 400X Kibblewhite Valve Springs Guides Complete Valves Head Rebuild Kit

Kibblewhite Precision
In stock

330-3120,30-3111,30-3115,30-3117,71016-4, 14711-KCY-670, 14721-KCY-670 14411-KCY-670, 14421-KCY-670 14431-KCY-670, 14445-KF0-000 14446-KF0-000, 144...

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$496.85
$496.85 - $496.85
$496.85
$359.36
$359.36 - $359.36
$359.36
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$207.38
$207.38 - $207.38
$207.38
$134.44
$134.44 - $134.44
$134.44

400EX 400X XR400 Kibblewhite Valves Valve Seals Black Diamond Intake Exhaust Kit

Kibblewhite Precision
In stock

FITS ALL HONDA 400EX 400X AND XR400R MODELS AND YEARS!! Kibblewhite Black Diamond kit Stainless steel one-piece valve construction MADE IN USA Std ...

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$207.38
$207.38 - $207.38
$207.38
$134.44
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$134.44
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$355.95 - $355.95
$355.95
$383.95
$383.95 - $383.95
$383.95

Hot Cams Stage 2 Camshaft Honda TRX400EX 400X XR400R 99–14 Performance Power Cam

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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$355.95
$383.95
$383.95 - $383.95
$383.95
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$473.60
$473.60 - $473.60
$473.60
$378.88
$378.88 - $378.88
$378.88

TRX 400EX 400X 440 Big Bore 89mm Cylinder Hi-Performance Cam Top End Rebuild Kit

BPRATV
In stock

4667M08900, 1043-2, C7826, 1051-3, 12100-KCY-670, 71016-4, 13111-KCY-670, 4606M08500, C7826, 71016-4, 13111-KCY-670, 12251-HN1-003, 12209-KL4-005, ...

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$473.60
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$473.60
$378.88
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$378.88
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$43.98
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$43.98
$31.19
$31.19 - $31.19
$31.19

99-14 Honda 400EX 400X 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
$43.98 - $43.98
$43.98
$31.19
$31.19 - $31.19
$31.19
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Save 18% Save %
$151.99
$151.99 - $151.99
$151.99
$124.98
$124.98 - $124.98
$124.98

Honda 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
$151.99 - $151.99
$151.99
$124.98
$124.98 - $124.98
$124.98
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$97.66
$97.66 - $97.66
$97.66
$86.48
$86.48 - $86.48
$86.48

Kibblewhite Honda TRX 400EX 400X Stronger Heavy Duty Cylinder Head Studs Kit

Kibblewhite Precision
In stock

Brand New Kibblewhite Extreme Heavy Duty Head Stud KitHonda 400EX & 400X Years 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011...

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$97.66
$97.66 - $97.66
$97.66
$86.48
$86.48 - $86.48
$86.48
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$843.69 - $843.69
$843.69
$868.36
$868.36 - $868.36
$868.36

TRX 400EX 400X Big Bore 89mm 440 Stage 3 Hotcam Kibblewhite Springs Top End Kit

BPRATV
In stock

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

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$843.69 - $843.69
$843.69
$868.36
$868.36 - $868.36
$868.36
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$21.99
$21.99 - $21.99
$21.99
$17.99
$17.99 - $17.99
$17.99

TRX400EX 400EX 400X XR400R Kibblewhite Viton Valve Stem Seals Seal Set of 4 Four

Kibblewhite Precision
In stock

Fits Honda 400EX, XR400R, 400X All Years, and many many more vehicles!The best on the market is a complete set of Kibblewhite RED Viton valve stem ...

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$21.99
$21.99 - $21.99
$21.99
$17.99
$17.99 - $17.99
$17.99
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$369.99
$369.99 - $369.99
$369.99
$298.88
$298.88 - $298.88
$298.88

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

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
$369.99 - $369.99
$369.99
$298.88
$298.88 - $298.88
$298.88
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$21.77
$21.77 - $21.77
$21.77
$18.88
$18.88 - $18.88
$18.88

Honda TRX400EX/TRX400X/XR400R Metal Valve Cover Gasket OEM 12391‑KCY‑671 '99‑14

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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Save 14% Save %
$299.99
$299.99 - $299.99
$299.99
$258.88
$258.88 - $258.88
$258.88

BEST Honda TRX 400EX 400X Top End Rebuild Kit Stock Cylinder Piston Camshaft SKF

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
$299.99 - $299.99
$299.99
$258.88
$258.88 - $258.88
$258.88
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Save 15% Save %
$149.99
$149.99 - $149.99
$149.99
$127.99
$127.99 - $127.99
$127.99

TRX400EX 400EX 400X Complete Cylinder Head Stud Kit Cases Top End Stud Bolt Kit

BPRATV Talon Titanium
In stock

BPRATV - The Original Trailblazer for Titanium Hardware in the ATV Industry.  Fits Honda TRX400EX & XR400X All Years & Models Kit includ...

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$149.99
$149.99 - $149.99
$149.99
$127.99
$127.99 - $127.99
$127.99
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$49.95
$49.95 - $49.95
$49.95
$39.98
$39.98 - $39.98
$39.98

Honda 400EX XR400 88mm 426cc Big Bore Wiseco Piston Replacement Rings Set 3465XC

BPRATV
In stock

🔥 Honda 400EX / XR400 88mm Wiseco Big Bore Piston Ring Set – 3465XC 🔥 🛠️ Product Overview This listing is for a genuine Wiseco 88mm piston r...

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$49.95
$49.95 - $49.95
$49.95
$39.98
$39.98 - $39.98
$39.98
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Save 23% Save %
$1,004.84
$1,004.84 - $1,004.84
$1,004.84
$769.89
$769.89 - $769.89
$769.89

Honda 400EX 87m Big Bore Kit Stage 2 Hotcam +2 Cylinder Piston 416cc Top End Kit

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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$1,004.84
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$1,004.84
$769.89
$769.89 - $769.89
$769.89
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Save 11% Save %
$899.99
$899.99 - $899.99
$899.99
$799.99
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$799.99

TRX 400EX 400X Assembled Head Assembly Complete Kibblewhite Valves Rocker Arms

BPRATV
In stock

TRX 400EX 400X Assembled Head Assembly Complete Kibblewhite Valves Rocker Arms ...

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$899.99
$899.99 - $899.99
$899.99
$799.99
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$799.99
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Save 18% Save %
$599.99
$599.99 - $599.99
$599.99
$489.99
$489.99 - $489.99
$489.99

Honda 400EX Rebuilt Bottom Lower End Rebuild Kit Crank Trans Main Bearings 99-04

BPRATV
In stock

COMPLETE BOTTOM END REBUILF FOR HONDA TRX 400EX!A Great & Affordable Complete Bottom End Rebuild Kit with a New Crankshaft, Complete Replacemen...

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$599.99
$599.99 - $599.99
$599.99
$489.99
$489.99 - $489.99
$489.99
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Save 45% Save %
$199.99
$199.99 - $199.99
$199.99
$110.99
$110.99 - $110.99
$110.99

99-04 Honda 400EX Ti Cylinder Head Studs Strongest Heavy Duty Titanium Stud Kit

BPRATV Talon Titanium
In stock

FITS ALL HONDA TRX400EX XR400R AND 400X MODELS AND YEARS - BUY IN BULK AND SAVE $$$Complete kit for cylinder headAll titanium stud and nut kitMade ...

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$199.99
$199.99 - $199.99
$199.99
$110.99
$110.99 - $110.99
$110.99
Save 45% Save %
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$529.00
$529.00 - $529.00
$529.00
$417.77
$417.77 - $417.77
$417.77

Honda TRX400EX TRX 400EX 400X 440cc Big Bore Kit Wiseco Piston & Gasket 89mm Kit

Wiseco
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
$529.00 - $529.00
$529.00
$417.77
$417.77 - $417.77
$417.77
Save 21% Save %
Save 13% Save %
$486.10
$486.10 - $486.10
$486.10
$424.44
$424.44 - $424.44
$424.44

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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$486.10
$486.10 - $486.10
$486.10
$424.44
$424.44 - $424.44
$424.44
Save 13% Save %
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$436.78
$436.78 - $436.78
$436.78
$388.88
$388.88 - $388.88
$388.88

Honda TRX400EX TRX 400EX Top End Rebuild Kit Cylinder JE Piston Cometic Gaskets

JE Pistons
Low stock

379165, 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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$436.78
$436.78 - $436.78
$436.78
$388.88
$388.88 - $388.88
$388.88
Save 11% Save %
$486.10 - $486.10
$486.10
$489.98
$489.98 - $489.98
$489.98

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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$486.10 - $486.10
$486.10
$489.98
$489.98 - $489.98
$489.98
Save 15% Save %
$99.99
$99.99 - $99.99
$99.99
$84.99
$84.99 - $84.99
$84.99

Honda 400EX 85mm Stock Bore WISECO Piston Rings Set & Cometic Top End Gasket Kit

Wiseco
In stock

C7825, XC8500, 3347XC,4606M08500, 4628M08500, C7825, XC8500, 3347XC,4606M08500, 4628M08500, 12251-KCY-671, H0401027S, 12191-KCY-671, 91302-356-000,...

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$99.99
$99.99 - $99.99
$99.99
$84.99
$84.99 - $84.99
$84.99
Save 15% Save %
$34.99 - $34.99
$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
$34.99
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$34.99
Save 27% Save %
$78.99
$78.99 - $78.99
$78.99
$57.88
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$57.88

Honda 400EX 86 87 88 89 mm Big Bore Cometic Top End Gasket Kibblewhite RED Seals

Cometic Gaskets
In stock

Cometic Complete Top End 89mm Big Bore Gasket KitPart # C7826UPC: 191070011307For 86, 87, 88, 89mm Big Bore & Stroker KitsGREAT FOR 416cc, 426c...

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$78.99
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$57.88
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$57.88
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$418.96
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$418.96
$408.88
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$408.88

Honda TRX400EX TRX 400EX 400X Stage 1 One Hotcam Hot Cam Hotcams & Timing Chain

Hot Rods
Low stock

Get ready to take your Honda TRX400EX TRX 400EX 400X to the next level with this Stage 1 One Hotcam Hot Cam Hotcams & Timing Chain kit! This po...

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$408.88
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$408.88
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$21.99
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$21.99
$17.99
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$17.99

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

Kibblewhite Precision
Low stock

Boost Your Honda TRX400EX's Performance With KPMI® Red Viton Valve Stem SealsKey Features/Benefits: Made from 100% Viton for maximum heat resistanc...

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$21.99
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$17.99
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$17.99
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$499.99
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$399.98

Honda TRX 400EX 400X Complete Head Rebuild Redo Kibblewhite Valves Valve Springs

Kibblewhite Precision
In stock

FITS ALL HONDA 400EX 400X AND XR400R MODELS AND YEARS - THE ONLY TRULY COMPLETE REBUILD KIT ONLINE Kibblewhite stainless steel intake and exhaust v...

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$499.99
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$399.98
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$399.98
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$418.74
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$399.98

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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$418.74
$399.98
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$399.98
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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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$999.98
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$999.98
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$355.95 - $355.95
$355.95
$383.95
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$383.95

Honda TRX400EX 400X XR400 Stage 2 Hotcams Hot Cams Camshaft Stage II Two Upgrade

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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$355.95 - $355.95
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$383.95
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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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$124.99
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$124.99
$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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$124.99
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$124.99
$89.88
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$89.88
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