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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 400EX 400X Titanium Cylinder Head Studs Gasket Gaskets Ti Stud Bolt Kit

Cometic Gaskets
In stock

FITS ALL HONDA TRX400EX, 400X AND XR400R MODELS AND YEARSCometic stock bore top end gasket kitAll Grade 5 Titanium Alloy cylinder head stud kitAlle...

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TRX 400EX 400X Cylinder Head Valve Cover Complete Rebuild Kit Stage 1 Hotcam

BPRATV
Low 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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Best Honda 400EX 400X OEM Cam Chain Guides Talon Heavy Duty Cam Timing Chain Kit

Honda OEM
Low stock

Genuine OEM Honda cam chain guidesBPRATV Talon heavy duty conversion timing chainWorks on all Honda 400EX, 400X, and XR400R models and yearsOEM Par...

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400EX Cylinder Head Kibblewhite Valves Complete Top End Rebuild Stage 2 Hotcam

BPRATV
In stock

THIS IS IT! NO ONE SELLS IT LIKE WE DO! FITS ALL HONDA TRX400EX, 400X, AND XR400R MODELS AND YEARS Kit includes: NEW aftermarket 85mm cylinder ...

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99-04 TRX 400EX 88mm Rebuild Kit Top Bottom Big Bore Motor Engine Assembly 426c

BPRATV
In stock

WORKS ON ALL '99-04 HONDA 400EX MODELS Aftermarket 88mm big bore cylinder 88mm big bore Wiseco JE or CP forged piston* Nitrite coated piston rings ...

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Honda 400EX 400X +1 Ported Assembled Head Port Porting Kibblewhite +1mm Valves

BPRATV
In stock

FITS ALL HONDA TRX400EX, 400X, AND XR400R MODELS AND YEARSNEW after-market cylinder head and valve cover Full race port and polish Valve guides cut...

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400EX 400X Cylinder Head Rebuild Kit Stage 2 Hotcam Kibblewhite Valve Cover

BPRATV
In stock

FITS ALL HONDA 400EX 400X AND XR400R MODELS AND YEARS!! Aftermarket cylinder head with valve cover Stage 2 Hotcam Cam bearings HD timing chain c...

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400EX 400X XR400R Ti Cylinder Head Studs Strongest Heavy Duty Titanium Stud Kit

BPRATV
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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Honda TRX400EX TRX 400EX 400X OEM Extreme Heavy Duty Hotcam Hot Cam Timing Chain

Hot Cams, Hot Rods, BPRATV, Honda TRX400EX TRX 400EX
In stock

HC82RH2010112,CC004,14401-KCY-671,31.1496,SCA0409SV112 Brand New Direct Replacement Hot Cams Heavy Duty Timing Chain Fits Honda TRX400EX, TRX400X,...

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1999-2004 Honda TRX 400EX 440 Big Bore Complete Rebuild Kit Stage 3 Hot Cams Cam

BPRATV
In stock

Complete Honda TRX400EX 440 big bore engine rebuild kit with forged piston, Hot Rods crankshaft, Stage 3 Hotcam, clutch kit, bearings, seals and ga...

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$458.00
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High Compression 12:1 JE Forged Piston Rebuild Kit Honda TRX400EX 85mm Cylinder!

JE Pistons
Out of stock

Honda XR400R rebuild kit with JE forged 12:1 piston, 85mm cylinder, and Cometic MLS gaskets for stronger throttle response. Honda 400EX High Compre...

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$33.34
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$26.68

Honda TRX400EX/TRX400X/XR400R 0.027" MLS Cylinder Head Gasket 86mm 85mm OEM Bore

Cometic Gaskets
In stock

Replace your TRX400EX head gasket with Cometic MLS. Fits 85-86mm bore, .027 thickness, durable and high performance. Cometic Honda TRX400EX TRX40...

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Cometic MLS Head Gasket 85mm OEM Stock Bore Head Gasket for Honda TRX400EX 400EX

Cometic Gaskets
In stock

Premium MLS gasket for Honda TRX400EX TRX400X XR400R. .027 thickness ensures optimal combustion sealing and durability. Cometic Honda TRX400EX TR...

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09-14 Honda TRX400X TRX 400EX 400X 85mm OEM Stock Bore Cometic MLS Head Gasket

Cometic Gaskets
In stock

High-quality Cometic MLS gasket for Honda 400EX TRX400X XR400R. Built for stock bore engines with precision sealing. Cometic Honda TRX400EX TRX40...

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$243.10
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Kibblewhite Top End Spring Guide Seal Kit Honda TRX400EX 400X XR400 Performance!

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

Wiseco 88mm Big Bore Cylinder Piston & Cometic Gasket Kit Honda 400EX 400X XR400

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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$218.88
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$218.88

Wiseco 87mm 11:1 416 Big Bore Piston + Cometic Top Gasket Kit Honda 400EX XR400R

Wiseco
Out of stock

4628M08700, C7826, 4606M08700, M2001, 133889, Upgrade your Honda 400EX, 400X, or XR400R with this Wiseco 87mm 416cc Big Bore Piston & Cometic G...

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$218.88
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$349.99
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$218.88

Honda TRX 400EX 400X 416 87mm Wiseco Big Bore Cylinder Piston Cometic Gasket Set

Wiseco
Out of stock

4628M08700, C7826, 4606M08700, M2001, 133889, Upgrade your Honda 400EX, 400X, or XR400R with this Wiseco 87mm 416cc Big Bore Piston & Cometic G...

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$218.88

416cc Big Bore Wiseco 87mm Piston & Cometic Gasket Kit Honda TRX400EX 400X XR400

Wiseco
Out of stock

4628M08700, C7826, 4606M08700, M2001, 133889, Upgrade your Honda 400EX, 400X, or XR400R with this Wiseco 87mm 416cc Big Bore Piston & Cometic G...

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$79.95
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Honda TRX400EX 400X XR400 Hot Cams Cam Chain HC82RH2010112 Hotcams TRX 400EX Cam

BPRATV
In stock

HC82RH2010112,CC004,14401-KCY-671,31.1496,SCA0409SV112Hot Cams, Direct OEM Replacement Cam Chain For Honda XR400R ’96-04 / TRX400EX / X ’99-14 A cr...

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$383.95
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Hot Cams Stage 2 Camshaft Honda TRX400EX 400X XR400R 99–14 Mid Top End 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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$383.95
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$136.86
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$108.88
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$108.88

99-14 Honda 400EX 400X Kibblewhite Head Saver Intake Exhaust Valve Guides Seals

Kibblewhite Precision
In stock

30-3120, 30-3111, 30-3115, 30-3117, MRS16, 30-3120, 71016-2, 12231-KF0-305,12209-KL4-005 🔥 99-14 Honda 400EX 400X Kibblewhite Head Saver Valve Gu...

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$136.86
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$108.88
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$108.88
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Honda XR400 XR 400 400EX Kibblewhite Head Intake Exhaust Valve Guides RED Seals

Kibblewhite Precision
In stock

30-3120, 30-3111, 30-3115, 30-3117, MRS16, 30-3120, 71016-2, 12231-KF0-305,12209-KL4-005 🔥 Honda XR400R 400EX 400X Kibblewhite Head Saver Valve G...

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$108.88
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$108.88
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$108.88
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Honda 400EX 400X XR400 Kibblewhite Head Saver Intake Exhaust Valve Guides Seals

Kibblewhite Precision
In stock

30-3120, 30-3111, 30-3115, 30-3117, MRS16, 30-3120, 71016-2, 12231-KF0-305,12209-KL4-005 🔥 99-14 Honda 400EX 400X Kibblewhite Head Saver Valve Gu...

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$53.99
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$43.19
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$43.19

TRX400EX XR400 400X Honda Valve Keepers Cotters with Kibblewhite Red Viton Seals

Kibblewhite Precision
In stock

Secure your Honda's valvetrain with this Complete Kit! Includes 8 Valve Keepers (14781-HA0-770) & 4 Kibblewhite RED Viton Seals (12209-422-005,...

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Honda TRX400EX 400X XR400R Valve Keepers Cotters Set Kibblewhite Viton Seals Kit

Kibblewhite Precision
In stock

Secure your Honda's valvetrain with this Complete Kit! Includes 8 Valve Keepers (14781-HA0-770) & 4 Kibblewhite RED Viton Seals (12209-422-005,...

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$43.19
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$264.00
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$194.56
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$194.56

Kibblewhite Top End Kit TRX 400EX 400X XR400R Valves Seals MLS Gaskets Complete

Kibblewhite Precision
In stock

Kibblewhite Top End Kit TRX 400EX 400X XR400R Valves Seals MLS Gaskets Complete ...

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$264.00
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$489.99
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$388.88
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$388.88

Honda 400EX 400X XR400 Top End Rebuild Kit CP Piston Gaskets Cylinder NGK Plug

CP-Carrillo
In stock

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

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$489.99
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$388.88
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$388.88
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Honda 400EX 400X XR400 Top End Rebuild Kit Stock CP Piston NGK Plug Cometic Set

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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$388.88
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Honda 400EX 400X XR400 Top End Rebuild Kit 11:1 CP Piston NGK Plug & Cometic Set

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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Honda TRX400EX 400X XR400 85mm 11:1 CP Piston Top End Kit Cometic MLS Gasket Set

CP-Carrillo
In stock

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

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$489.99
$388.88
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$388.88
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$489.99
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Honda TRX400EX 400X XR400 85mm Top End Rebuild Kit 11:1 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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$489.99
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$599.99
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$447.50
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$447.50

TRX 400EX 400X 87mm Big Bore Cylinder +2mm Top End Rebuild Kit Complete Assembly

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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$419.98
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$419.98
$376.88
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TRX 400EX TRX400EX 400X 87mm 87 416cc Big Bore Cylinder 11:1 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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$49.95
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$49.95
$39.98
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$39.98

Wiseco 88mm Ring Set 3465XC Fits Honda 400EX XR400R 426cc Big Bore Piston Repair

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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$386.78
$388.88
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TRX400EX 400EX 400X XR400 85mm Stock Bore Cylinder JE Piston Gaskets Rebuild Kit

BPRATV
Low stock

TRX400EX 400EX 400X XR400 85mm Stock Bore Cylinder JE Piston Gasket Rebuild Kit! ...

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$388.88
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$605.79
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$424.44
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$424.44

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

JE Pistons
In stock

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

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$424.44
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$424.44
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Honda TRX 400EX 400X Big Bore Top End Rebuild Kit 89mm Cylinder JE Piston Gasket

JE Pistons
In stock

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

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$424.44
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$424.44
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$599.99
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$447.50
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$447.50

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

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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$447.50
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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 87mil 10.8 416cc JE Cometic Cylinder Big Bore Kit

JE Pistons
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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$381.55
$381.55 - $381.55
$381.55
$238.87
$238.87 - $238.87
$238.87

TRX400EX 400EX 87mm 87 416cc Big Bore Cylinder 11:1 CP Piston Cometic Gasket Kit

BPRATV
Out of stock

4628M08700, 133889, 4606M08700, 1043-2, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, 30-33750, 13011-KCY-670, ...

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$238.87
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$238.87
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$999.99
$999.99 - $999.99
$999.99
$648.88
$648.88 - $648.88
$648.88

99-04 Honda TRX 400EX 85mm Stock Bore Cylinder Wiseco Piston Engine Rebuild Kit

Wiseco
In 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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$1,019.99
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$1,019.99
$744.44
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$744.44

TRX 400EX 89mm +4 Big Bore Cylinder Crank Wiseco Piston Engine Rebuild Kit 99-04

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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$1,009.99
$699.98
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$699.98

TRX 400EX 87mm +2 Big Bore Cylinder Crank Wiseco Piston Engine Rebuild Kit 99-04

BPRATV
In stock

WPC131A, 4606M08700, 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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05+ Honda TRX400EX 87mm Big Bore Cylinder Crank Wiseco Piston Engine Rebuild Kit

Wiseco
In stock

WPC131B, 4606M08700, C7826, K014, B5047,4040, C7825, 808894, 822278, 4040, CBK0016, C7826, 12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673...

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$699.98
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$699.98
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$386.78 - $386.78
$386.78
$388.88
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$388.88

TRX400EX 400EX 400X XR400 85mm Stock Bore Cylinder JE Piston Gaskets Rebuild Kit

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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$388.88
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$388.88
$386.78 - $386.78
$386.78
$388.88
$388.88 - $388.88
$388.88

TRX400EX 400EX 400X 85mm Bore Cylinder JE Piston Cometic Gaskets Top Rebuild Kit

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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$388.88
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$605.79
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$605.79
$424.44
$424.44 - $424.44
$424.44

TRX 400EX 400X XR400 89mm Big Bore Cylinder 10.8:1 JE Piston Gaskets Rebuild Kit

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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