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Due to Thanksgiving and the holiday rush, our current handling time is approximately 4–5 business days. We sincerely appreciate your patience and understanding. We truly appreciate your business and are thankful for another great year serving our customers. If you have any questions or concerns, please contact us—our team is working as hard as possible to ship all orders promptly.
Due to Thanksgiving and the holiday rush, our current handling time is approximately 4–5 business days. We sincerely appreciate your patience and understanding. We truly appreciate your business and are thankful for another great year serving our customers. If you have any questions or concerns, please contact us—our team is working as hard as possible to ship all orders promptly.

Honda TRX400EX

Honda 400EX Rebuild Kits, Pistons, and Parts

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TRX400 400EX 400X Stock Cylinder 85m Complete Top End Rebuild Stage 1 Hotcam Kit

BPRATV

FITS ALL HONDA TRX400EX, 400X, AND XR400R MODELS AND YEARS   - 85mm after market cylinder  - 85mm JE CP or Wiseco forged piston**  - Piston rings  ...

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TRX 400EX 400X XR400 89mm Big Bore Kit Hi Comp Race Gas 12.5:1 440 Rebuild Kit

BPRATV

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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$472.99
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TRX 400EX 400X XR400 87mm Big Bore Kit Hi Comp Race Gas 12.5:1 416cc Rebuild Kit

BPRATV

FITS ALL HONDA TRX400EX, 400X, AND XR400R MODELS AND YEARS NEW after market 87mm cylinder CP or JE forged RACE GAS ONLY piston** Hi temp piston ri...

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TRX 400EX 400X Stage 2 Hotcam Kibblewhite Valve Springs Chain Cam Bearings Kit

BPRATV

FITS ALL HONDA TRX400EX, 400X, AND XR400R MODELS AND YEARS Hotcams Stage 2 camshaft Cam bearings Kibblewhite race valve spring kit BASE WASHERS NOT...

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TRX 400EX 400X XR 88m Big Bore Stage 3 Hotcam Valve Springs +3 Top End Kit 426cc

BPRATV

Compatible Vehicles Submodel Year Make Model TRX400EX 2x4 2008 Honda Sportrax 400 TRX400EX 2x4 2007 Honda Sportrax 400 TRX400EX 2x4 20...

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$49.99
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Honda Sportrax 400 TRX400EX TRX 400X XR400R Big Bore 89mm Aftermarket Piston Kit

BPRATV

FITS ALL HONDA SPORTRAX TRX 400EX YEARS AND MODELS!!Big Bore Aftermarket 89mm 10:1 pistonPiston ringsWristpinCirclipsFits all 89mm 400EX Cylinders

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05+ 400EX 400X 87mm Big Bore Rebuild Kit Top Bottom End Motor Engine Repair Redo

BPRATV

Works on all 2005+ Honda 400EX and 400X models 87mm big bore cylinder 87mm big bore Wiseco or Wossner forged piston Nitrite-coated piston rings C...

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99-04 400EX 88mm Big Bore Rebuild Kit Top Bottom End Motor Engine Repair Redo

BPRATV

Works on all '99-04 Honda 400EX models 88mm big bore cylinder 88mm 10:1 big bore Wiseco or Wossner forged piston Nitrite-coated piston rings Chro...

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400X 400EX Titanium Cylinder Head Studs Ti Stud Upgrade Performance Kit Set

BPRATV

All Grade 5 Titanium alloy stud and nut kit No case or cylinder machining required Heat treated, allen head studs 12 point flange nuts and 3mm wa...

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05+ 400EX 400X Complete Motor Engine Cylinder Head Rebuilt Rebuild Assembly Kit

BPRATV

Works on all 2005+ Honda 400EX and 400X models 85mm stock bore cylinder 85mm stock bore Wiseco or Wossner forged piston Nitrite-coated piston rin...

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Honda 400EX 400X +1mm Over Piston Wiseco 4606M08600 86mm Piston Top End Gaskets

BPRATV

Works on all Honda 400EX, 400X, and XR400R models and years Wiseco 86mm forged piston Nitrite coated piston rings Chrome wristpin Circlips Top en...

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400EX 400X Cylinder Head Stage 2 Cam Assembled Head Assembly Camshaft Gasket Kit

BPRATV

Brand new aftermarket cylinder head and valve cover Complete assembly of both head and valve cover  Valve springs, retainers, and seats Intake an...

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400EX 400X XR400 Top End Rebuild Kit Stock Cylinder Piston Upper Assembly Parts

BPRATV

Works on all Honda 400EX 400X and XR400R models and years NEW aftermarket cylinder Forged Wiseco or Wossner piston** Hi temp piston rings Chrome w...

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$999.99 - $999.99
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05+ TRX 400EX 400X Big Bore Rebuild Kit 87mm +2 Engine Motor Redo Assembly Parts

BPRATV

FITS ALL 05+ HONDA TRX400EX AND TRX400X MODELS NEW 87mm after market cylinder CP JE or Wiseco forged piston** Hi temp piston rings Wristpin Circlip...

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$999.99 - $999.99
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99-04 TRX 400EX Big Bore 89 mil Complete Rebuilt Motor Engine Rebuild Parts Kit

BPRATV

FITS ALL 99-04 HONDA TRX400EX SPORTRAX MODELS NEW 89mm after market cylinder CP JE or Wiseco forged hi comp pump gas piston** Hi temp piston rings...

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$1,537.49 - $1,537.49
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05+ TRX 400EX 400X 89mm Big Bore Rebuild Kit +4 Complete 440 Stage 3 Hotcam

BPRATV

FITS ALL '05+ TRX400EX and TRX400X MODELS 89mm after market cylinder Wiseco CP or JE 89mm forged piston**  Nitrite coated piston rings Chrome wris...

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$1,537.49 - $1,537.49
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$1,229.99
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05-14 400EX 400X Big Bore 87mm Hotcams Complete Rebuilt Motor Engine Rebuild Kit

BPRATV

FITS ALL 05+ HONDA TRX400EX AND TRX400X MODELS NEW 87mm after market cylinder CP JE Wiseco or Wossner forged piston* Hi temp piston rings Wristpin ...

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$1,229.99
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400EX Cylinder Head Kibblewhite Valves Complete Top End Rebuild Stage 2 Hotcam

BPRATV

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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$494.06 - $494.06
$494.06
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2005 TRX 400EX Bottom End Rebuild Kit Hotrods Crank Lower Motor Engine Assembly

BPRATV

FITS ALL 2005+ HONDA 400EX MODELS Hotrods replacement crankshaft with rod assembled SKF heavy duty replacement crank bearings Complete gasket kit...

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$839.99
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TRX 400EX 400X Top End Rebuild Hotcams Valve Springs Complete Stock Cylinder Kit

BPRATV

4606M08500,C7826,1007-1,30-3111,12100-KCY-670, 1043-2, M2002, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, 30-...

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99-04 TRX 400EX 400X Complete Rebuilt Bottom End Engine Rebuild Kit 87mm Piston

BPRATV

FITS ALL 99-04 HONDA TRX 400EX MODELS Wiseco or Hotrods heavy duty crank with rod** Wiseco or Hotrods crank bearings Wiseco CP or JE 87mm forged h...

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400EX 400X XR400R 87 mil Big Bore Kit Stage 3 Hotcam KPMI Springs Top End Kit

BPRATV

FITS ALL HONDA TRX400EX, 400X, AND XR400R MODELS AND YEARS NEW after market 87mm cylinder Wiseco CP or JE forged piston** Hi temp piston rings Wri...

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$768.74 - $768.74
$768.74
$768.74 - $768.74
$768.74
$699.99 - $699.99
$699.99
$699.99 - $699.99
$699.99

05+ TRX 400EX 400X Complete Rebuilt Bottom End Engine Rebuild Kit 87mm Piston

BPRATV

FITS ALL '05+ HONDA TRX 400EX 400X MODELS Wiseco or Hotrods heavy duty crank with rod** Wiseco or Hotrods crank bearings Wiseco CP or JE 87mm for...

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$699.99 - $699.99
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$199.99
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Best Honda TRX 400EX 400X Head Studs TITANIUM Cylinder Head Stud Bolt Kit Set

BPRATV

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 po...

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$199.99
$199.99 - $199.99
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$1,299.99 - $1,299.99
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05+ TRX 400EX 400X Big Bore Rebuild Kit 87mm +2 Top Bottom End Stage 2 Hotcam

BPRATV

FITS ALL HONDA 05+ TRX400EX AND 400X YEARS AND MODELS!  87mm after market cylinder Wiseco or JE forged piston** Hi temp piston rings Chrome wristp...

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$1,299.99 - $1,299.99
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$749.99 - $749.99
$749.99
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05+ 400X 400EX Stroker Rebuild Kit Hotrods +4mm Crank Bottom End Assembly Repair

BPRATV

FITS ALL 2005+ HONDA 400EX AND 400X MODELS Hotrods +4mm stroker crankshaft assembly with rod Complete gasket kit MLS head gasket  Oil seal kit  Va...

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$749.99 - $749.99
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05+ TRX 400X 400EX Stock Rebuilt Motor Engine Bottom End Rebuild Assembly Kit

BPRATV

FITS ALL '05+ HONDA 400EX AND 400X MODELS Hotrods or Wiseco HD crankshaft with rod Complete gasket kit MLS head gasket Complete seal kit Valve ste...

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$849.99 - $849.99
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$849.99
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$895.00
$895.00 - $895.00
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400EX 400X Cylinder Head Rebuild Kit Stage 2 Hotcam Kibblewhite Valve Cover

BPRATV

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

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$895.00
$895.00 - $895.00
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$795.00
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$849.99 - $849.99
$849.99
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99-04 TRX400EX TRX 400EX Rebuilt Motor Engine Bottom End Rebuild Assembly Kit

BPRATV

FITS ALL '99-04 HONDA 400EX MODELS Hotrods or Wiseco HD crankshaft with rod Complete gasket kit MLS head gasket Complete seal kit Valve stem seals...

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$849.99 - $849.99
$849.99
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$849.99
$1,099.99 - $1,099.99
$1,099.99
$1,099.99 - $1,099.99
$1,099.99

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

BPRATV

FITS ALL 05+ HONDA 400EX AND 400X MODELS NEW after market cylinder CP JE or Wiseco forged piston** Hi temp piston rings Chrome wristpin Circlips H...

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$1,099.99 - $1,099.99
$1,099.99
$1,099.99 - $1,099.99
$1,099.99
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$1,294.11
$1,294.11 - $1,294.11
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$1,099.99
$1,099.99 - $1,099.99
$1,099.99

99-04 TRX 400EX Complete Rebuilt Motor Engine Rebuild Top & Bottom End Parts Kit

BPRATV

FITS ALL 99-04 HONDA TRX400EX SPORTRAX MODELS NEW after market cylinder CP JE or Wiseco forged piston** Hi temp piston rings Wristpin Circlips Hotr...

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$1,294.11
$1,294.11 - $1,294.11
$1,294.11
$1,099.99
$1,099.99 - $1,099.99
$1,099.99
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