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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 XR400R Top End Rebuild Kit JE Forged 12:1 85mm Piston Stock Bore!

JE Pistons
Low stock

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

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$388.88

JE Forged 12:1 Piston Cylinder Rebuild Kit Honda TRX400EX XR400R 85mm Stock Bore

JE Pistons
Low stock

Restore Honda TRX400X and XR400R performance with JE forged piston technology, stock bore cylinder, and premium gasket sealing. Honda TRX400X XR400...

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1999-2014 Honda TRX400EX TRX400X XR400R JE 12:1 Cylinder Rebuild Kit Stock Bore!

JE Pistons
Low stock

Complete Honda TRX400EX top end rebuild kit with JE forged 12:1 piston, stock bore cylinder, Cometic MLS gaskets, and premium performance parts. ...

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$999.99
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$769.89
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$769.89

TRX400EX TRX 400EX Big Bore Kit 87mm Cylinder Stage 2 Hotcam Top End Rebuild Kit

Wiseco,Hot Cams,Cometic,BPRATV,Honda TRX 400EX TRX400EX
In stock

Complete 87mm 416cc big bore kit for Honda TRX400EX, TRX400X & XR400. Includes Stage 2 Hot Cam, forged piston, Cometic gaskets, titanium studs ...

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$33.34
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$26.68
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$26.68

Cometic Head Gasket 85mm Standard Bore Head Gasket for Honda TRX400EX 400EX 400X

Cometic Gaskets
In stock

Cometic MLS head gasket for TRX400EX TRX400X XR400R. USA-made, 3-layer steel, perfect for stock bore rebuilds. Cometic Honda TRX400EX TRX400X XR4...

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99-08 Honda Sportrax TRX400EX TRX 400EX 85mm Stock Bore Cometic MLS Head Gasket

Cometic Gaskets
In stock

Upgrade your TRX400EX engine with Cometic MLS gasket. .027 thickness, 85-86mm bore, improved durability and sealing. Cometic Honda TRX400EX TRX40...

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Honda TRX400EX Sportrax TRX400X 85mm OEM Stock Bore Cometic MLS Head Gasket USA

Cometic Gaskets
In stock

MLS head gasket for TRX400EX XR400R TRX400X. Cometic quality, 3-layer steel, perfect for stock rebuild applications. Cometic Honda TRX400EX TRX40...

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$26.68

TRX400EX TRX 400EX 85mm OEM Stock Bore Cometic MLS Head Gasket USA 12251-HN1-A41

Cometic Gaskets
In stock

USA-made Cometic MLS head gasket for TRX400EX TRX400X XR400R. .027 thickness, 85-86mm bore, reliable sealing performance. Cometic Honda TRX400EX ...

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$1,199.99
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$1,048.88
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$1,048.88

05+ Honda TRX 400EX 400X Complete Engine Rebuild Kit Top Bottom End Crank Piston

BPRATV
In stock

Complete top and bottom end rebuild kit for 2005+ Honda TRX400EX and 400X. Includes forged piston, crankshaft, bearings, seals, clutch kit and tita...

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05+ TRX 400EX 400X Rebuild Kit Complete Top Bottom End Motor Engine Assembly Set

BPRATV
In stock

Complete top and bottom end rebuild kit for 2005+ Honda TRX400EX and 400X. Includes forged piston, crankshaft, bearings, seals, clutch kit and tita...

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2005+ TRX 400EX 400X Full Top Bottom End Engine Rebuild Set Forged Piston Crank

BPRATV
In stock

Complete top and bottom end rebuild kit for 2005+ Honda TRX400EX and 400X. Includes forged piston, crankshaft, bearings, seals, clutch kit and tita...

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Honda TRX 400EX Pro-X Intake Valves Kibblewhite Red Viton Seals Head Rebuild Kit

Pro-X
Low stock

Restore power to your Honda TRX400EX with Pro-X intake valves and Kibblewhite red seals. Direct fit, premium materials, and proven performance. ...

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$58.89
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Honda TRX400EX 400X XR400 Kibblewhite Spring Kit Guides Viton Seals KPMI 30-3111

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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$188.88
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Honda TRX400EX 400X XR400 Kibblewhite Titanium Valve Spring Kit 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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Kibblewhite 30-3111 30-3120 Titanium Spring Kit Valve Guides Seal TRX400EX XR400

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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426cc Big Bore Wiseco 88mm Piston & Cometic Gasket Kit Honda TRX400EX 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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$349.99
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$218.88
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Honda TRX 400EX 400X 426 88mm Wiseco Big Bore Cylinder Piston Cometic Gasket Set

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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$349.99
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$349.99
$218.88
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$218.88
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$349.99
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Wiseco 88mm 11:1 426 Big Bore Piston + Cometic Top Gasket Kit Honda 400EX XR400R

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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$349.99
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$218.88
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$349.99
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$218.88
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$218.88

Honda 400EX 400X Wiseco 87mm 416 Big Bore Cylinder 11:1 Piston Top Gasket Kit US

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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$349.99
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$349.99
$218.88
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$218.88
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$349.99
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$349.99
$218.88
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$218.88

Wiseco 87mm Big Bore Cylinder Piston & Cometic Gasket Kit Honda 400EX 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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$349.99
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$349.99
$218.88
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$218.88
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$79.95
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$74.95

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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$79.95
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$79.95
$74.95
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$74.95
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$303.39
$303.39 - $303.39
$303.39
$257.88
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$257.88

05-14 Honda TRX 400EX Wiseco Heavy Duty Forged Clutch Basket Fibers Spring Steel

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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$303.39
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$303.39
$257.88
$257.88 - $257.88
$257.88
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$303.39
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$303.39
$257.88
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05-14 Honda TRX 400EX Wiseco Heavy Duty Forged Clutch Basket Fibers Spring Steel

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

New Wiseco WPP3043 Forged Clutch Basket Kit Honda TRX400EX 400X 05-14 BPRATV Kit

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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$303.39
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$303.39
$257.88
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$257.88
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$136.86
$136.86 - $136.86
$136.86
$108.88
$108.88 - $108.88
$108.88

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

Kibblewhite Precision
Low 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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$136.86
$108.88
$108.88 - $108.88
$108.88
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$136.86
$136.86 - $136.86
$136.86
$108.88
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$108.88

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

Kibblewhite Precision
Low 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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$136.86
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$136.86
$108.88
$108.88 - $108.88
$108.88
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$36.00
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$36.00
$28.81
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$28.81

BPRATV Valve Cotters Honda Sportrax 400EX XR400R TRX400X 14781-HA0-770 1996-2014

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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$36.00
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$36.00
$28.81
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$28.81

TRX400EX 400X XR400R Valve Keeper Cotters Set Replaces Honda OEM # 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
$36.00 - $36.00
$36.00
$28.81
$28.81 - $28.81
$28.81
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$53.99
$53.99 - $53.99
$53.99
$43.19
$43.19 - $43.19
$43.19

Honda TRX400EX 400EX 400X XR400 Valve Keeper Cotters Kibblewhite RED Viton Seals

Kibblewhite Precision
In stock

Honda OEM, 14781-HA0-770, 12209-422-005, 12209-KL4-005, 71016-4,14781-HA0-770, XC110, 519-CVV2220C, Secure your Honda's valvetrain with BPRATV's Va...

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$53.99
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$53.99
$43.19
$43.19 - $43.19
$43.19
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$53.99
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$53.99
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$43.19

Honda TRX400EX 400X XR400R Valve Keepers KPMI Viton Seals OEM #14781-HA0-770 NEW

Kibblewhite Precision
In stock

Honda OEM, 14781-HA0-770, 12209-422-005, 12209-KL4-005, 71016-4,14781-HA0-770, XC110, 519-CVV2220C, Secure your Honda's valvetrain with BPRATV's Va...

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$53.99
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$53.99
$43.19
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$43.19
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$53.99
$53.99 - $53.99
$53.99
$43.19
$43.19 - $43.19
$43.19

Honda TRX400EX 400X XR400 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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$53.99
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$43.19
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$53.99
$53.99 - $53.99
$53.99
$43.19
$43.19 - $43.19
$43.19

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

Kibblewhite Precision
In stock

Honda OEM, 14781-HA0-770, 12209-422-005, 12209-KL4-005, 71016-4,14781-HA0-770, XC110, 519-CVV2220C, Secure your Honda's valvetrain with BPRATV's Va...

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$53.99
$53.99 - $53.99
$53.99
$43.19
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$43.19
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$53.99
$53.99 - $53.99
$53.99
$43.19
$43.19 - $43.19
$43.19

Honda TRX400EX 400X XR400R Valve Keepers KPMI Viton Seals OEM #14781-HA0-770 NEW

Kibblewhite Precision
In stock

Honda OEM, 14781-HA0-770, 12209-422-005, 12209-KL4-005, 71016-4,14781-HA0-770, XC110, 519-CVV2220C, Secure your Honda's valvetrain with BPRATV's Va...

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$53.99
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$53.99
$43.19
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$43.19
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$53.99
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$43.19

TRX400EX 400X XR400 Honda Valve Keepers Cotters Kit Kibblewhite Viton Stem 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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$53.99
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$53.99
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$43.19
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$53.99
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$53.99
$43.19
$43.19 - $43.19
$43.19

Honda TRX400EX 400X XR400R Valve Keepers Cotters and 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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$53.99
$53.99 - $53.99
$53.99
$43.19
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$43.19
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$53.99
$53.99 - $53.99
$53.99
$43.19
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$43.19

Honda TRX 400EX 400X XR400R Valve Keepers Cotters Kit with Red Kibblewhite 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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$53.99
$53.99 - $53.99
$53.99
$43.19
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$43.19
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$444.68
$444.68 - $444.68
$444.68
$398.88
$398.88 - $398.88
$398.88

TRX400EX XR400R 87mm 416 Big Bore Top End Rebuild Kit Wiseco Cometic Gaskets 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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$444.68
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$444.68
$398.88
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$398.88
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$444.68
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$444.68
$398.88
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$398.88

Honda XR400 TRX400EX 87mm 416cc Big Bore Top End Rebuild Kit Wiseco Cometic NEW!

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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$444.68
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$444.68
$398.88
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$398.88
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$1,445.99
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$1,299.99
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Honda TRX400EX 89mm Big Bore Stroker 465cc Crank Piston Motor Engine Rebuild Kit

BPRATV
Low stock

4240, CBK0037, 4040, DPR8Z, WPC131A, WPC131B, CBK0016, TBK0012, K014, 3011-KCY-670, 90601-KA5-000, 13103-KCY-670, 13111-KCY-670, 12251-HN1-003, 122...

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$1,445.99
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$1,299.99
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$1,299.99
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$264.00
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$264.00
$194.56
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$194.56

Honda TRX 400EX 400X XR400R Valves Set Gasket Kit RED Seals Kibblewhite USA Made

Kibblewhite Precision
In stock

30-3115, 30-3117, 30-3111, 30-3115, 71016-4, 71016 14711-KCY-670, 14721-KCY-670, 14411-KCY-670, 14431-KCY-670, 14445-KF0-000, 14446-KF0-000, 14751-...

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$264.00
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$264.00
$194.56
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$194.56
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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 XR 400R 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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$18.88
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$18.88
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$489.99
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$489.99
$388.88
$388.88 - $388.88
$388.88

Honda TRX400EX 400X XR400 85mm CP-Carrillo Piston Top End Kit Cometic Gasket Set

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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$489.99
$388.88
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$388.88
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$49.95
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$49.95
$39.98
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$39.98

Honda 400EX XR400 Wiseco 88mm Big Bore Rings 3465XC 426cc Piston Top End Engine

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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$39.98
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$39.98
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$28.50
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$28.50
$15.99
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$15.99

Honda 2005+ TRX 400EX 400 OEM Replacement Transmission NTN Bearing 91004-HN1-A41

NTN
Low stock

🔥 Honda TRX400EX TRX400X NTN 91004-HN1-A41 Transmission Bearing 🔥 🛠️ Product Overview Premium NTN Deep Groove Ball Bearing OEM-spec transmis...

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$15.99
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$15.99
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$524.99
$539.83
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$539.83

TRX 400EX Hotcams Stage 1 Stock Replace Camshaft Valves Rockers Head Rebuild Kit

Hot Cams
Low stock

1007-1, 14000-HN1-A70,14711-KCY-670, 14721-KCY-670, 14411-KCY-670, 14421-KCY-670, 14431-KCY-670, 14445-KF0-000, 14446-KF0-000, 14447-KF0-000, 14751...

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$539.83
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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 89mm 440cc 12.5 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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$699.99
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$489.98
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$1,129.99
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$1,129.99
$789.99
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$789.99

05-14 400EX 400 EX 88mm Simple Rebuild Kit Wiseco Piston Complete Gaskets Seals

BPRATV
In stock

WPC131A, 4606M08800, CBK0080, C7826, K014, B5047,4040, K014, B5047,4040, C7825, 808894, 822278, 4040, CBK0016, C7826, 12100-KCY-670, 4606M08500, C7...

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$789.99
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$789.99
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$436.78
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$436.78
$388.88
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$388.88

TRX400EX 400EX 400X XR400R 85mm Stock 10.5 JE Piston Cometic Top End Rebuild Kit

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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$388.88
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