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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 TRX400EX TRX 400EX 400X Stage 3 Three Hotcams Cam & Hot Cams Timing Chain✅

Hot Cams
Low stock

1051-3, HC82RH2010112, 91003-KF0-008, 91002-MN1-671, 14000-HN1-000, 14401-KCY-671,14401-KCY-671, HC82RH2010112, HC82RH2010112,CC004,14401-KCY-671,3...

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Honda 400EX 400X XR400 Complete Titanium Left Crankcase Cover Bolts Screws 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!Replaces OEM Part #: 90004-G...

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Honda 400EX 400X Top End Rebuild Cylinder Head Valve Cover Stock Upper Assembly

BPRATV
In stock

FITS ALL HONDA TRX400EX, 400X, AND XR400R MODELS AND YEARS NEW aftermarket cylinder 10:1 piston Hi-temp piston rings Chrome wrist pin Circlips To...

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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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$604.99
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TRX 400EX 400X Top End Rebuild Kit Stock Bore Cylinder Piston 85mm Assembly Part

BPRATV
In stock

1043-2, M2002, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, 30-33750, 13011-KCY-670, 90601-KA5-000, 13103-KCY-...

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

BPRATV
In stock

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

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

BPRATV Talon Titanium
In stock

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

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

SKF
Low stock

FITS ALL HONDA TRX400EX AND 400X YEARS AND MODELS!  SKF set of 4 front wheel bearings Replacement for both left and right front hubs Better than O...

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99-04 TRX400EX TRX 400EX 416 Big Bore Complete Motor Rebuild Valves Hotcams 87mm

BPRATV
In stock

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

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

BPRATV
In stock

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

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Honda 400EX 400X XR400R OEM Timing Guide Tensioner & Chain Tensioner Cam Chain

Honda OEM
Low stock

FITS ALL HONDA 400EX 400X XR400R MODELS AND YEARSGenuine Honda OEM cam chain guide - OEM Part # 14620-KCY-670Genuine Honda OEM cam chain tensioner ...

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Honda TRX 400EX XR400 Kibblewhite Valve Spring Kit Bronze Valve Guides RED Seals

Kibblewhite Precision
In stock

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

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$349.99
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$218.88
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$218.88

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

Wiseco
Out of stock

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

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$303.39
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$257.88
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05-14 Honda TRX400EX Wiseco Forged Clutch Basket Fibers Springs & Steels Kit NEW

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 TRX400EX XR400 85mm 400cc Stock Bore Kit Wiseco Forged Piston Cometic MLS

Wiseco, Cometic Gaskets, BPRATV, Honda TRX400EX 400X XR400R
In 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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$444.68
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$444.68
$398.88
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$398.88

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

BPRATV
In stock

1043-2, M2002, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, 30-33750, 13011-KCY-670, 90601-KA5-000, 13103-KCY-...

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$398.88
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$388.88

Honda TRX400EX 400X XR400 85mm Top End Rebuild Kit 10:1 CP Piston Cometic Gasket

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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$49.95
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Honda TRX 400EX XR400 Wiseco 88mm Piston Rings 3465XC Big Bore 426cc Rebuild Set

Wiseco
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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Honda TRX 400EX Big Bore 89mm 440cc 12.5:1 Wiseco Piston Top Engine Rebuild Kit

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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$744.44
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$744.44

99-04 Honda TRX400EX 89mm 440 Big Bore Cylinder Wiseco Piston Engine Rebuild Kit

BPRATV
In stock

WPC131A, 4667M08900, CBK0080, C7826, K014, B5047,4040, K014, B5047,4040, C7825, 808894, 822278, 4040, CBK0016, C7826, 12100-KCY-670, 4606M08500, C7...

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$1,009.99
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$699.98
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99-04 Honda 400EX 88mm Big Bore Cylinder Crank Wiseco Piston Engine Rebuild Kit

BPRATV
In stock

Upgrade your 1999-2004 Honda TRX 400EX to a powerful 426cc with BPRATV’s complete big bore engine rebuild kit. Includes 88mm cylinder, Wiseco forge...

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$538.68
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$533.68

TRX 400EX 400X XR400R Stage 1 Hot Cams Valves Springs Complete Head Rebuild Kit

Hot Cams
Low stock

1007-1,3P-HRK,14775-KCY-670,90544-KF0-000,91002-MN1-671FITS ALL HONDA TRX400EX, 400X, AND XR400R MODELS AND YEARSStage 1 Hot Cams CamshaftSKF OEM U...

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$538.68
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$149.99
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$109.99
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$109.99

400EX 400X TITANIUM Cylinder Head Studs Ti Stud 12 Point Nut Kit Set

BPRATV Talon Titanium
In stock

All Grade 5 Titanium alloy stud nut and washer kit Heat treated, allen head studs 12 point flange nuts 3mm washers As strong as, half the weight of...

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$149.99
$109.99
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$109.99
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$486.10
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$486.10
$447.50
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$447.50

Best 400EX 400X XR400 87mm Big Bore Cylinder Piston Kit 416 +2mm Top End Rebuild

BPRATV
In stock

1007-1, M2008, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, 1043-2,C7826, 71016-4, 12191-KCY-673, 30-33750, 13011-KCY-670, 90601-KA5-000, 131...

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$486.10
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$447.50
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$447.50
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$133.78
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$133.78
$119.89
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$119.89

Honda 400EX 400X XR400 ProX Valve Rebuild Kit Valves Set KIBBLEWHITE Red Seals

Pro-X
In stock

28.1495-2, 28.1495-1,14711-KCY-670,14721-KCY-670,12209-KL4-005,30-3115,30-3117,8400003-2, 8400003-1,VES003,VIS003,X2VEK16000,X2VIK16000Is your Hond...

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$119.89
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$119.89
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$834.95
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$834.95
$802.33
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$802.33

Honda 400EX 400X 87mm 416cc CP 11 Pump Gas Big Bore Cylinder Stage 1 Hot Cam Kit

BPRATV
Low stock

1043-2, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, 30-33750, 13011-KCY-670, 90601-KA5-000, 13103-KCY-670, 13...

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$802.33
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$802.33
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$27.49
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$27.49
$19.89
$19.89 - $19.89
$19.89

TRX 400EX 400X XR400 Stock OEM Hot Cams Camshaft Cam Shaft Bearing 91003-KF0-008

SKF
In stock

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

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$27.49
$19.89
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$19.89
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$19.86
$19.86 - $19.86
$19.86

TRX 400EX 400X XR400 Stock OEM Hot Cams Camshaft Cam Shaft Bearing 91002-MN1-671

SKF
In stock

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

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$19.86
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$19.86
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$39.99
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$29.98
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$29.98

Cam Shaft Bearings For Honda TRX400EX 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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$33.34
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$33.34
$30.88
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$30.88

09-14 Honda TRX400X TRX 400EX 400X 87 88mm 89mm Big Bore Cometic MLS Head Gasket

Cometic, Cometic Gasket, Honda TRX 400EX 400X XR400, BPRATV
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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Honda TRX400EX Sportrax TRX400X 87 88 89 mm Big Bore Cometic MLS Head Gasket USA

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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$44.99
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$34.99

NEW Honda TRX400EX TRX 400EX XR 400X 87mm WISECO Big Bore Piston Rings Set JAPAN

Wiseco
In stock

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

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$44.99
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$44.99
$34.99
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$34.99
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$500.49
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$500.49
$323.89
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$323.89

Honda 400EX 400X XR400 Top End Rebuild Kit CP 10:1 Piston Gaskets Cylinder NGK🔥

BPRATV
In stock

Honda 400EX 400X XR400 Top End Rebuild Kit CP 10:1 Piston Gaskets Cylinder NGK🔥 ...

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$500.49
$323.89
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$323.89
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$500.49
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$388.88
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$388.88

Honda 400EX 400X XR400 Top End Rebuild Kit CP 11:1 Piston Gaskets Cylinder NGK🔥

BPRATV
In stock

Complete 85mm Stock / Standard Bore Top End Rebuild Kit With CP Carrillo Piston and Cometic GasketsThe best rebuild kit on the market should have a...

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$500.49
$388.88
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$388.88
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$277.76
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$254.44
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$254.44

TRX400EX 400EX OEM Timing Guide Tensioner With Chain Tensioner HOTCAMS Cam Chain

Honda OEM
Low stock

FITS ALL HONDA 400EX 400X XR400R MODELS AND YEARSGenuine Honda OEM cam chain guide - OEM Part # 14620-KCY-670Genuine Honda OEM cam chain tensioner ...

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$277.76
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$277.76
$254.44
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$254.44
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$314.99
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$314.99
$219.89
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$219.89

Honda 400EX 400X Wiseco 89mm BIG BORE 12.5:1 Piston COMETIC Top End Gasket Kit

Wiseco
In stock

Honda TRX 400EX 440cc Wiseco 89mm Big Bore 12.5:1 Compression Piston & Cometic Top End Gasket KitFits Honda TRX 400EX & 400XYears 1999 2000...

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$314.99
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$314.99
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$219.89
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$999.99
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$999.99
$899.98
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$899.98

TRX400X TRX400EX Wiseco Complete Rebuilt Motor Engine Rebuild Top Bottom End Kit

BPRATV
Out of stock

FITS ALL '05+ 400EX AND 400X ALL YEARS ALL MODELS NEW stock bore after market cylinder CP JE Wiseco or Wossner forged piston* Hi temp piston rings ...

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$999.99
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$999.99
$899.98
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$79.95
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$79.95
$71.99
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$71.99

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

Wiseco
In stock

Wiseco, Direct OEM Replacement Cam Chain, XR400R ’96-04 / TRX400EX / X ’99-14 A critical component to four-stroke top-end and valvetrain maintenanc...

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$79.95
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$79.95
$71.99
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$71.99
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$102.99
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$89.98
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$89.98

Honda TRX400EX 400EX 85mm Stock Bore Wiseco Piston Rings Set COMETIC Gasket Kit

Wiseco
In stock

Honda 400EX / 400X / XR400 85mm Wiseco Piston Replacement Rings KitPart# XC8500 / 3347XC / C7825 Get Power and Performance with the Honda TRX400EX ...

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Honda TRX400EX TRX 400EX TITANIUM Exhaust Studs Valve Head Valve Cover Bolt Kit

BPRATV Talon Titanium
In stock

92900-08022-0B, 90301-HM8-000, 95701-08070-00, 90084-KCY-670, 90004-GHB-700, 90004-GHB-760, 90004-GHB-710BPRATV - The Original Trailblazer for Tita...

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$999.99
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$749.99
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05-14 400EX 400 EX Stock Simple Rebuild Kit Wiseco Piston Complete Gaskets Seals

BPRATV
In stock

Honda TRX 400EX 400X Simple Rebuild Kit (Stock Bore 85mm) We've heard your feedback! Some of our kits are Too Complete. We mean it when we say no o...

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$349.99
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$238.88
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$238.88

99-14 TRX400EX 400EX 400X XR400 89mm 10.8:1 440cc JE Piston Cometic Gaskets Kit

JE Pistons
Out of stock

JE 89mm 10.8:1 416cc Big Bore Piston Kit & Cometic Top End Gasket SetFits Honda TRX400EX, TRX400X, and XR400Years 1999 2000 2001 2002 2003 2004...

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TRX400EX 400EX 400X 89mm 440cc 10.8:1 JE Piston Cometic Gaskets Kit Top End +4mm

JE Pistons Cometic Gaskets BPRATV Honda 400EX OEM Aftermarket Rep
Out of stock

JE 89mm 10.8:1 416cc Big Bore Piston Kit & Cometic Top End Gasket SetFits Honda TRX400EX, TRX400X, and XR400Years 1999 2000 2001 2002 2003 2004...

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TRX400EX 400EX 400X 88mm 11:1 JE Piston Cometic Gaskets Kit Top End Rebuild Seal

JE Pistons
Low stock

JE 88mm 11:1 426cc Big Bore Piston Kit & Cometic Top End Gasket SetFits Honda TRX400EX, TRX400X, and XR400Years 1999 2000 2001 2002 2003 2004 2...

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$472.99
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$459.99
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BPRATV TRX400EX TRX 400EX Cylinder Wiseco Piston Stock Bore Top End Rebuild Kit

BPRATV
Out of 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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$459.99
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TRX400EX TRX 400EX 400X Complete Assembled Head Porting Port Assemble Valves Kit

BPRATV
In stock

FITS ALL HONDA TRX400EX AND 400X MODELS AND YEARS NEW AFTER MARKET cylinder head with valve cover  Full race port and polish  Complete head assem...

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$549.99
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TRX400EX TRX 400EX Stage 2 Hotcam Hot Cam Valves Springs Rockers Head Rebuild

BPRATV
Low stock

FITS ALL HONDA TRX400EX TRX400X AND XR400R YEARS AND MODELS   COMPLETE PERFORMANCE HEAD REBUILD KIT! Stage 2 Hotcam Complete valve train head re...

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$299.97
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$211.97
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Honda 400EX 400X 89mm Piston Wiseco Big Bore +4 Over Piston Cometic Gasket Kit

BPRATV
In stock

Works on all Honda 400EX, 400X, and XR400R models and years Wiseco 89mm big bore forged piston Nitrite coated piston rings Chrome wristpin Circli...

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