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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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$449.99

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

BPRATV

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

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TRX400EX TRX 400EX 88mm Big Bore Stage 2 Cam Kibblewhite Valves 426 Top End Kit

BPRATV

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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$692.99
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$599.99
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$599.99

TRX 400EX 400X Webcam Web Cam Kibblewhite Valves Valve Springs Head Redo Kit

BPRATV

FITS ALL HONDA TRX400EX, XR400, AND 400X YEARS AND MODELS!  Webcam custom grind high performance camshaft Kibblewhite race valve spring kit Ki...

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$692.99
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$599.99
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$599.99
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$479.99 - $479.99
$479.99
$479.99 - $479.99
$479.99

TRX 400EX 400X XR 416 Big Bore Kit 87 mil Cylinder +2 Complete Top End Rebuild

BPRATV

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

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$599.99
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$473.54
$473.54 - $473.54
$473.54

*TRX 400EX 400X Hotrods Crank Bearings Hot Rods Rod Crankshaft Main Bearing Kit

BPRATV

WORKS ON ALL HONDA 400EX AND 400X MODELS AND YEARS - BUY IN BULK AND SAVE $$ Hotrods OEM replacement crankshaft with gear Connecting rod, rod be...

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$599.99
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$599.99
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$999.99
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$899.99
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$899.99

TRX 400EX 400X Assembled Head Assembly Stage 2 Hot Cam Chain Hotcam Camshaft Kit

BPRATV

FITS ALL XR400R TRX400EX and TRX400X MODELS New aftermarket cylinder head and valve cover Stage 2 Hotcams camshaft HD cam chain conversion SKF cam...

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$999.99
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$199.99
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$199.99
$149.99
$149.99 - $149.99
$149.99

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

Cometic Gaskets

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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$149.99
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$1,154.95
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$1,154.95
$72.99
$72.99 - $72.99
$72.99

TRX 400EX 400X Stock Bore Piston Aftermarket 10:1 Standard 85mm Head Gasket Kit

BPRATV

FITS ALL HONDA 400EX 400X XR400R YEARS AND MODELS!! BUY IN BULK AND SAVE!! Standard 85mm 10:1 piston Piston rings Wristpin Circlips Top end gaske...

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$1,154.95
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$72.99
$72.99 - $72.99
$72.99
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$799.99
$799.99 - $799.99
$799.99
$699.99
$699.99 - $699.99
$699.99

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

BPRATV

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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$699.99
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$604.99
$604.99 - $604.99
$604.99
$399.99
$399.99 - $399.99
$399.99

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

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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$604.99
$399.99
$399.99 - $399.99
$399.99
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$82.99
$82.99 - $82.99
$82.99
$72.99
$72.99 - $72.99
$72.99

TRX 400EX 400X Big Bore 89mm 10:1 Piston Kit Top End Gasket Cometic Head Gasket

BPRATV

FITS ALL HONDA 400EX 400X XR400R YEARS AND MODELS!! Standard Aftermarket 89mm 10:1 piston Piston rings Wristpin Circlips Top end gasket kit COMETIC...

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$82.99
$72.99
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$72.99
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$604.99
$604.99 - $604.99
$604.99
$199.99
$199.99 - $199.99
$199.99

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

BPRATV Talon Titanium

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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$604.99
$199.99
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$199.99
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$1,299.99
$1,299.99 - $1,299.99
$1,299.99
$999.99
$999.99 - $999.99
$999.99

400EX Ported Cylinder Head Porting Assembled +1 Valves Kibblewhite 1mm Valve Kit

BPRATV

Brand new aftermarket cylinder head and valve cover Full race port and polish - intake, exhaust, combustion chamber Valve guides cut Pocket port ...

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$199.99
$199.99 - $199.99
$199.99
$159.99
$159.99 - $159.99
$159.99

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

Honda OEM

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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$199.99
$159.99
$159.99 - $159.99
$159.99
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$1,599.99 - $1,599.99
$1,599.99
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$1,599.99

400EX Ported Cylinder Head Assembly Stage 2 Hotcam Kibblewhite Studs Complete

BPRATV

Brand new aftermarket cylinder head and valve cover Full race port and polish - intake, exhaust, combustion chamber Valve guides cut Complete ass...

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$1,599.99
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$1,599.99
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$1,299.99
$1,299.99 - $1,299.99
$1,299.99
$1,099.99
$1,099.99 - $1,099.99
$1,099.99

99-04 TRX 400EX 89mm Rebuild Kit Top Bottom Big Bore Motor Engine Assembly 440c

BPRATV

WORKS ON ALL '99-04 HONDA 400EX MODELS Aftermarket 89mm big bore cylinder 89mm big bore Wiseco JE or CP forged piston* Nitrite coated piston rings ...

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$1,299.99
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$1,299.99
$1,099.99
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$1,099.99
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$59.99
$59.99 - $59.99
$59.99
$49.99
$49.99 - $49.99
$49.99

Best 400EX 400X XR400R Black Billet Cam Chain Tensioner Heavy Duty Timing Chain

BPRATV

FITS ALL HONDA 400EX 400X AND XR400R MODELS AND YEARS Aftermarket heavy duty timing chain upgrade Black billet cam chain tensioner Chain tensioner...

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$59.99
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$59.99
$49.99
$49.99 - $49.99
$49.99
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$1,099.99 - $1,099.99
$1,099.99
$1,099.99 - $1,099.99
$1,099.99

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

BPRATV

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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$1,099.99 - $1,099.99
$1,099.99
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$1,099.99
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$799.99
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$799.99
$699.99
$699.99 - $699.99
$699.99

99-04 400EX Sportrax Crank Bottom End Rebuild Crankshaft Motor Engine Assembly

BPRATV

FITS ALL HONDA 400EX 400X AND XR400R MODELS AND YEARS Hotrods or Wiseco crankshaft assembly with rod Complete gasket kit MLS head gasket  Oil seal...

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$139.99
$139.99 - $139.99
$139.99
$110.99
$110.99 - $110.99
$110.99

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

BPRATV

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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$139.99
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$139.99
$110.99
$110.99 - $110.99
$110.99
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$202.39
$202.39 - $202.39
$202.39
$119.99
$119.99 - $119.99
$119.99

Best Honda TRX 400EX 400X XR400 Head Studs TITANIUM Cylinder Head Stud Kit

BPRATV

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

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$202.39
$202.39 - $202.39
$202.39
$119.99
$119.99 - $119.99
$119.99
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Save 32% Save %
$436.78
$436.78 - $436.78
$436.78
$298.88
$298.88 - $298.88
$298.88

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

JE Pistons

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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$436.78
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$436.78
$298.88
$298.88 - $298.88
$298.88
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$436.78
$436.78 - $436.78
$436.78
$298.88
$298.88 - $298.88
$298.88

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

JE Pistons

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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$436.78
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$436.78
$298.88
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$298.88
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$436.78
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$436.78
$298.88
$298.88 - $298.88
$298.88

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

JE Pistons

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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$436.78
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$436.78
$298.88
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$298.88
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$436.78
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$436.78
$298.88
$298.88 - $298.88
$298.88

Honda TRX400EX TRX 400EX Top End Rebuild Kit Cylinder JE Piston Cometic Gaskets

JE Pistons

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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$436.78
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$436.78
$298.88
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$298.88
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$581.79
$581.79 - $581.79
$581.79
$324.88
$324.88 - $324.88
$324.88

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

JE Pistons

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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$581.79
$324.88
$324.88 - $324.88
$324.88
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$581.79
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$581.79
$324.88
$324.88 - $324.88
$324.88

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

JE Pistons

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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$581.79
$324.88
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$324.88
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$581.79
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$581.79
$324.88
$324.88 - $324.88
$324.88

TRX400EX 400EX 400X 89mm 10.8 440cc JE Piston Cometic Gasket Top End Rebuild Kit

JE Pistons

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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$581.79
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$581.79
$324.88
$324.88 - $324.88
$324.88
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$581.79
$581.79 - $581.79
$581.79
$324.88
$324.88 - $324.88
$324.88

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

JE Pistons

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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$581.79
$324.88
$324.88 - $324.88
$324.88
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$581.79
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$581.79
$324.88
$324.88 - $324.88
$324.88

Honda TRX 400EX Big Bore Top End Rebuild Kit 89mm +4 Cylinder 11:1 JE Piston Kit

JE Pistons

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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$581.79
$324.88
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$324.88
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$581.79
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$581.79
$324.88
$324.88 - $324.88
$324.88

TRX400EX 400EX 400X 89mm 440cc Big Bore Cylinder JE 11:1 Piston Cometic Top Kit

JE Pistons

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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$581.79
$324.88
$324.88 - $324.88
$324.88
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$581.79
$581.79 - $581.79
$581.79
$324.88
$324.88 - $324.88
$324.88

TRX400EX 400EX 400X XR400 89mm 89mil 11:1 440cc JE Cometic Cylinder Big Bore Kit

JE Pistons

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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$581.79
$324.88
$324.88 - $324.88
$324.88
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$581.79
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$581.79
$324.88
$324.88 - $324.88
$324.88

TRX 400EX 400X 89mm Big Bore Cylinder 11:1 JE Piston Cometic Top End Rebuild Kit

JE Pistons

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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$581.79
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$581.79
$324.88
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$324.88
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$399.99
$399.99 - $399.99
$399.99
$349.99
$349.99 - $349.99
$349.99

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

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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$399.99
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$399.99
$349.99
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$349.99
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$436.78
$436.78 - $436.78
$436.78
$304.88
$304.88 - $304.88
$304.88

TRX400EX 400EX 400X XR400 87mm 87 416cc JE Cometic 10.8:1 Cylinder Big Bore 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
$304.88
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$304.88
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$436.78
$304.88
$304.88 - $304.88
$304.88

TRX400EX 400EX 400X XR400 87mm 87mil 10.8 416cc JE Cometic Cylinder Big Bore 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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$304.88
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