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SHIPPING UPDATE: Due to high demand, orders are currently processing in 5-7 business days. Need it faster? Contact us to upgrade to expedited shipping! If you’ve found the item elsewhere or can’t wait, no problem—we completely understand. Just reach out to us, and we’ll cancel your order. Thanks for your patience and support! BRAPPPPPPPPPP!

Honda TRX400EX

Honda 400EX Rebuild Kits, Pistons, and Parts

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Honda TRX400EX 400EX 400X XR400 87mm 416cc JE Cometic 12:1 Cylinder Big Bore Kit

BPRATV

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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$304.88
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$528.09
$528.09 - $528.09
$528.09
$448.88
$448.88 - $448.88
$448.88

TRX400EX TRX 400EX 89mm 440cc Big Bore Race Gas Hi-Comp 12.5 Piston Top End Kit

BPRATV

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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$448.88
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$448.88
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$1,264.95
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$1,264.95
$788.89
$788.89 - $788.89
$788.89

TRX400EX TRX 400EX Genuine Honda OEM Cylinder Wiseco Piston Top End Rebuild Kit

Honda OEM

12100-KCY-670, 4606M08500, C7825, C7825-EST, 1043-2, M2002, M2003, M2001,4606M08700,12100-KCY-670, 12100-HN1-A70, 12191-KCY-672,13011-KCY-670, 1310...

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$788.89
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$788.89
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$124.99
$124.99 - $124.99
$124.99
$89.88
$89.88 - $89.88
$89.88

400EX 400X XR400R Ti Cylinder Case Studs Titanium Crankcase Stud Upgrade Kit Set

BPRATV Talon Titanium

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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$89.88
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$89.88
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$765.20
$765.20 - $765.20
$765.20
$588.89
$588.89 - $588.89
$588.89

TRX 400EX 400X Stock Bore Cylinder 85 mil Piston Top End Rebuild Stage 1 Hotcams

BPRATV

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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$765.20
$588.89
$588.89 - $588.89
$588.89
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$999.99
$999.99 - $999.99
$999.99
$648.88
$648.88 - $648.88
$648.88

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

BPRATV

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

99-04 Honda 400EX 85mm OEM Bore Cylinder Crank Wiseco Piston Engine Rebuild Kit

BPRATV

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

BPRATV

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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$999.99
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$999.99
$648.88
$648.88 - $648.88
$648.88
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$1,019.99
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$1,019.99
$729.98
$729.98 - $729.98
$729.98

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

BPRATV

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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$1,019.99
$729.98
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$729.98

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

BPRATV

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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$729.98
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$1,019.99
$729.98
$729.98 - $729.98
$729.98

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

BPRATV

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
$699.98 - $699.98
$699.98

TRX 400EX 88mm +3 Big Bore Cylinder Crank Wiseco Piston Engine Rebuild Kit 99-04

BPRATV

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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$699.98
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$699.98
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$1,009.99
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$699.98
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$699.98

99-04 Honda 400EX 88mm Big Bore Cylinder Crank Wiseco Piston Engine Rebuild Kit

BPRATV

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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$699.98
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$1,009.99
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$1,009.99
$699.98
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$699.98

99-04 Honda TRX400EX 88mm 426 Big Bore Cylinder Wiseco Piston Engine Rebuild Kit

BPRATV

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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$699.98
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$699.98
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$1,009.99
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$1,009.99
$699.98
$699.98 - $699.98
$699.98

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

BPRATV

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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$699.98
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$1,009.99
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$1,009.99
$699.98
$699.98 - $699.98
$699.98

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

BPRATV

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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$699.98
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$1,009.99
$699.98
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$699.98

99-04 Honda TRX400EX 87mm 416 Big Bore Cylinder Wiseco Piston Engine Rebuild Kit

BPRATV

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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$699.98
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Save 35% Save %
$999.99
$999.99 - $999.99
$999.99
$648.88
$648.88 - $648.88
$648.88

05+ Honda TRX400EX 85mm OEM Bore Cylinder Crank Wiseco Piston Engine Rebuild Kit

BPRATV

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

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

TRX 400EX 400X 85mm OEM Bore Cylinder Crank Wiseco Piston Engine Rebuild Kit 05+

BPRATV

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

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$999.99
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$999.99
$648.88
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$648.88
Save 35% Save %
Save 35% Save %
$999.99
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$999.99
$648.88
$648.88 - $648.88
$648.88

05+ Honda 400EX 400X 85mm Stock Bore Cylinder & Wiseco Piston Engine Rebuild Kit

BPRATV

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

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$999.99
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$999.99
$648.88
$648.88 - $648.88
$648.88
Save 35% Save %
Save 28% Save %
$1,019.99
$1,019.99 - $1,019.99
$1,019.99
$729.98
$729.98 - $729.98
$729.98

05+ Honda 400EX 400X 89mm 440 Big Bore Cylinder Wiseco Piston Engine Rebuild Kit

BPRATV

WPC131B, 4667M08900, C7826, K014, B5047,4040, C7825, 808894, 822278, 4040, CBK0016, C7826, 12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673...

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$1,019.99
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$1,019.99
$729.98
$729.98 - $729.98
$729.98
Save 28% Save %
Save 28% Save %
$1,019.99
$1,019.99 - $1,019.99
$1,019.99
$729.98
$729.98 - $729.98
$729.98

05+ Honda TRX400EX 89mm Big Bore Cylinder Crank Wiseco Piston Engine Rebuild Kit

BPRATV

WPC131B, 4667M08900, C7826, K014, B5047,4040, C7825, 808894, 822278, 4040, CBK0016, C7826, 12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673...

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$1,019.99
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$1,019.99
$729.98
$729.98 - $729.98
$729.98
Save 28% Save %
Save 28% Save %
$1,019.99
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$1,019.99
$729.98
$729.98 - $729.98
$729.98

TRX 400EX 400X 89mm Big Bore Cylinder Crank Wiseco Piston Engine Rebuild Kit 05+

BPRATV

WPC131B, 4667M08900, C7826, K014, B5047,4040, C7825, 808894, 822278, 4040, CBK0016, C7826, 12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673...

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$1,019.99
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$1,019.99
$729.98
$729.98 - $729.98
$729.98
Save 28% Save %
Save 29% Save %
$1,009.99
$1,009.99 - $1,009.99
$1,009.99
$719.98
$719.98 - $719.98
$719.98

TRX 400EX 400X 88mm Big Bore Cylinder Crank Wiseco Piston Engine Rebuild Kit 05+

BPRATV

WPC131B, 4606M08800, C7826, K014, B5047,4040, C7825, 808894, 822278, 4040, CBK0016, C7826, 12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673...

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$1,009.99
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$1,009.99
$719.98
$719.98 - $719.98
$719.98
Save 29% Save %
Save 29% Save %
$1,009.99
$1,009.99 - $1,009.99
$1,009.99
$719.98
$719.98 - $719.98
$719.98

05+ Honda TRX400EX 88mm Big Bore Cylinder Crank Wiseco Piston Engine Rebuild Kit

BPRATV

WPC131B, 4606M08800, C7826, K014, B5047,4040, C7825, 808894, 822278, 4040, CBK0016, C7826, 12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673...

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$1,009.99
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$1,009.99
$719.98
$719.98 - $719.98
$719.98
Save 29% Save %
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$1,009.99
$1,009.99 - $1,009.99
$1,009.99
$719.98
$719.98 - $719.98
$719.98

05+ Honda 400EX 400X 88mm 426 Big Bore Cylinder Wiseco Piston Engine Rebuild Kit

BPRATV

WPC131B, 4606M08800, C7826, K014, B5047,4040, C7825, 808894, 822278, 4040, CBK0016, C7826, 12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673...

View full details
$1,009.99
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$1,009.99
$719.98
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$719.98
Save 29% Save %
Save 31% Save %
$1,009.99
$1,009.99 - $1,009.99
$1,009.99
$699.98
$699.98 - $699.98
$699.98

TRX 400EX 400X 87mm Big Bore Cylinder Crank Wiseco Piston Engine Rebuild Kit 05+

BPRATV

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

View full details
$1,009.99
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$1,009.99
$699.98
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$699.98
Save 31% Save %
Save 31% Save %
$1,009.99
$1,009.99 - $1,009.99
$1,009.99
$699.98
$699.98 - $699.98
$699.98

05+ Honda TRX400EX 87mm Big Bore Cylinder Crank Wiseco Piston Engine Rebuild Kit

BPRATV

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

View full details
$1,009.99
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$699.98
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$699.98
Save 31% Save %
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$1,009.99
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$1,009.99
$699.98
$699.98 - $699.98
$699.98

05+ Honda 400EX 400X 87mm 416 Big Bore Cylinder Wiseco Piston Engine Rebuild Kit

BPRATV

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

View full details
$1,009.99
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$1,009.99
$699.98
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$699.98
Save 31% Save %
Save 23% Save %
$386.78
$386.78 - $386.78
$386.78
$298.88
$298.88 - $298.88
$298.88

Honda 400X 400EX XR 400R Top End Cylinder Top Rebuild Kit 10.5 JE Piston Gaskets

BPRATV

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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$386.78
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$386.78
$298.88
$298.88 - $298.88
$298.88
Save 23% Save %
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$386.78
$386.78 - $386.78
$386.78
$298.88
$298.88 - $298.88
$298.88

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

BPRATV

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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$386.78
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$386.78
$298.88
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$298.88
Save 23% Save %
Save 23% Save %
$386.78
$386.78 - $386.78
$386.78
$298.88
$298.88 - $298.88
$298.88

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

BPRATV

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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$386.78
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$386.78
$298.88
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$298.88
Save 23% Save %
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$436.78
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$436.78
$304.88
$304.88 - $304.88
$304.88

TRX400EX 400EX 400X 87mm Big Bore Cylinder JE Piston Cometic Top End Rebuild Kit

BPRATV

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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$436.78
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$436.78
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$304.88
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$436.78
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$436.78
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$304.88 - $304.88
$304.88

TRX400EX 400EX 400X 88mm Big Bore Cylinder JE Piston Cometic Top End Rebuild Kit

BPRATV

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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$436.78
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$436.78
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TRX 400EX 400X XR400 89mm Big Bore Cylinder 10.8:1 JE Piston Gaskets Rebuild Kit

BPRATV

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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$319.98
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$319.98
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$499.99
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$319.98
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$319.98

TRX400EX 400X 89mm Big Bore Cylinder 10.8 JE Piston Cometic Top End Rebuild Kit

BPRATV

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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