Shop Honda 400Ex Performance Upgrades

Sponsored
$82.99
Dynojet Stage 1 & 2 Carburetor Jet Kit Fits Honda TRX400EX Sportrax 400EX/TRX400EX Fourtrax 400EX
PartsGiant
23
Free shipping
$82.99
Dynojet Stage 1 & 2 Carburetor Jet Kit Fits Honda TRX400EX Sportrax 400EX/TRX400EX Fourtrax 400EX
PartsGiant
23
$649.89
TRX400EX 400EX Cylinder Head Stage 2 Hot Cams WISECO Chain Big Bore Cometic Kit
US eBay
Free shipping
$649.89
TRX400EX 400EX Cylinder Head Stage 2 Hot Cams WISECO Chain Big Bore Cometic Kit
US eBay
Free shipping
$329.95
Bbr Full Big Bore Kit W/Cam - 411-HXR-1001 | Speedaddicts.Com
Speed Addicts
$329.95
Bbr Full Big Bore Kit W/Cam - 411-HXR-1001 | Speedaddicts.Com
Speed Addicts
$699.99
TRX 400EX 400X XR 88m Big Bore Kit Stage 3 Hotcam Hot Cam +3 Top End Rebuild Kit
eBay.com
Free shipping
$699.99
TRX 400EX 400X XR 88m Big Bore Kit Stage 3 Hotcam Hot Cam +3 Top End Rebuild Kit
eBay.com
Free shipping
$717.49
TRX 400EX 400X Big Bore 89mm 440 Stage 3 Hotcam Kibblewhite Springs Top End Kit
US eBay
Free shipping
$717.49
TRX 400EX 400X Big Bore 89mm 440 Stage 3 Hotcam Kibblewhite Springs Top End Kit
US eBay
Free shipping
$129.99
Honda XR400R BIG BORE Top End Kit 440Cc 89mm 10:1 TRX400EX All Years 1996-2009
eBay.com
Free shipping
$129.99
Honda XR400R BIG BORE Top End Kit 440Cc 89mm 10:1 TRX400EX All Years 1996-2009
eBay.com
Free shipping
$549.98
Honda 400EX 87m Big Bore Kit Stage 2 Hotcam +2 Cylinder Piston 416Cc Top End Kit
eBay.com
1
Free shipping
$549.98
Honda 400EX 87m Big Bore Kit Stage 2 Hotcam +2 Cylinder Piston 416Cc Top End Kit
eBay.com
1
$242.99
$269.99
FMF Powercore 4 Complete Exhaust With Stainless Hi-Flo Header-Dirtbike Full System Exhaust 041501
Motosport
1
Free shipping
10% off
$242.99
$269.99
FMF Powercore 4 Complete Exhaust With Stainless Hi-Flo Header-Dirtbike Full System Exhaust 041501
Motosport
1
$86.95
2005-2008 Honda 400EX Rick's Motorsport Hot Shot CDI Ignition Boxes | Rick's Motorsport Electrics 15-618
Summit Racing
$86.95
2005-2008 Honda 400EX Rick's Motorsport Hot Shot CDI Ignition Boxes | Rick's Motorsport Electrics 15-618
Summit Racing
$699.99
TRX 400EX 400X XR 88m Big Bore Kit Stage 3 Hotcam Hot Cam +3 Top End Rebuild Kit
US eBay
Free shipping
$699.99
TRX 400EX 400X XR 88m Big Bore Kit Stage 3 Hotcam Hot Cam +3 Top End Rebuild Kit
US eBay
Free shipping
$649.89
Honda TRX400EX Assembled Cylinder Head Stage 2 Hot Cams WISECO Chain Cometic Kit
eBay.com
Free shipping
$649.89
Honda TRX400EX Assembled Cylinder Head Stage 2 Hot Cams WISECO Chain Cometic Kit
eBay.com
Free shipping
$251.99
$279.99
FMF Powercore 4 Complete Exhaust With Stainless Hi-Flo Header-Dirtbike Full System Exhaust 041533
Motosport
1
Free shipping
10% off
$251.99
$279.99
FMF Powercore 4 Complete Exhaust With Stainless Hi-Flo Header-Dirtbike Full System Exhaust 041533
Motosport
1
$649.89
Honda TRX400EX Assembled Cylinder Head Stage 2 Hot Cams WISECO Chain Cometic MLS
eBay.com
Free shipping
$649.89
Honda TRX400EX Assembled Cylinder Head Stage 2 Hot Cams WISECO Chain Cometic MLS
eBay.com
Free shipping
$569.99
TRX400EX TRX 400EX Stage 2 Hotcam Cylinder Wiseco Piston Top End Rebuild Kit
eBay.com
Free shipping
$569.99
TRX400EX TRX 400EX Stage 2 Hotcam Cylinder Wiseco Piston Top End Rebuild Kit
eBay.com
Free shipping
$525.99
1999-2004 Honda 400EX Wiseco Crankshaft Kits | Wiseco WPC131A
Summit Racing
7
Free shipping
$525.99
1999-2004 Honda 400EX Wiseco Crankshaft Kits | Wiseco WPC131A
Summit Racing
7
$688.89
Honda TRX 400EX Assembled Cylinder Head Stage 3 Hot Cams Chain Big Bore Cometic
eBay.com
Free shipping
$688.89
Honda TRX 400EX Assembled Cylinder Head Stage 3 Hot Cams Chain Big Bore Cometic
eBay.com
Free shipping
$496.97
2005-2008 Honda 400EX Wiseco Crankshaft Kits | Wiseco WPC131B
Summit Racing
5
Free shipping
$496.97
2005-2008 Honda 400EX Wiseco Crankshaft Kits | Wiseco WPC131B
Summit Racing
5
$251.99
$279.99
FMF Powercore 4 Complete Race Exhaust Stainless Hi-Flo Header-Dirtbike Full System Exhaust 044136
Motosport
17
Free shipping
10% off
$251.99
$279.99
FMF Powercore 4 Complete Race Exhaust Stainless Hi-Flo Header-Dirtbike Full System Exhaust 044136
Motosport
17
$399.99
TRX400EX TRX 400EX 416 Big Bore Kit 87 Mil Cylinder +2 Top End Rebuild Complete
US eBay
3
Free shipping
$399.99
TRX400EX TRX 400EX 416 Big Bore Kit 87 Mil Cylinder +2 Top End Rebuild Complete
US eBay
3
$4,322.50
Kraftwerkz Honda Talon Turbo Kit | UTV Source
UTV Source
$4,322.50
Kraftwerkz Honda Talon Turbo Kit | UTV Source
UTV Source
$82.49
$99.99
S23 Ruckus Performance Carburetor Kit | Motor Scooter Parts And Accessories
Scooter Swap Shop
17% off
$82.49
$99.99
S23 Ruckus Performance Carburetor Kit | Motor Scooter Parts And Accessories
Scooter Swap Shop
$688.89
Honda TRX 400EX Assembled Cylinder Head Stage 2 Hot Cams Chain Big Bore Cometic
US eBay
Free shipping
$688.89
Honda TRX 400EX Assembled Cylinder Head Stage 2 Hot Cams Chain Big Bore Cometic
US eBay
Free shipping
$345.14
$383.49
Big Gun EVO R Slip-On Exhaust Honda Fourtrax / Sportrax TRX400EX 99-20
RevZilla
60
10% off
$345.14
$383.49
Big Gun EVO R Slip-On Exhaust Honda Fourtrax / Sportrax TRX400EX 99-20
RevZilla
60
$349.99
Tyson Racing Honda 400EX Swingarm + Inserts Round Style Chromoly +4" Extended
eBay
Free shipping
$349.99
Tyson Racing Honda 400EX Swingarm + Inserts Round Style Chromoly +4" Extended
eBay
Free shipping
$649.89
400EX 400X XR400R Cylinder Head Stage 2 Hot Cams WISECO Chain & 87 88 89 Cometic
US eBay
Free shipping
$649.89
400EX 400X XR400R Cylinder Head Stage 2 Hot Cams WISECO Chain & 87 88 89 Cometic
US eBay
Free shipping
$196.76
$245.95
HOTCAMS Camshaft - Stage 1 Intake, Medium-Dirtbike Camshaft 2218-1in
Motosport
1
Free shipping
20% off
$196.76
$245.95
HOTCAMS Camshaft - Stage 1 Intake, Medium-Dirtbike Camshaft 2218-1in
Motosport
1
$666.24
Honda 400EX 400X 89mm Big Bore Kit Valves Springs Stage 3 Hotcam Hot Cam 440Cc
US eBay
Free shipping
$666.24
Honda 400EX 400X 89mm Big Bore Kit Valves Springs Stage 3 Hotcam Hot Cam 440Cc
US eBay
Free shipping
$289.92
Stage 3 Hotcams Big Bore Cam Honda TRX400EX TRX 400EX 400X 1051-3
eBay.com
2
Free shipping
$289.92
Stage 3 Hotcams Big Bore Cam Honda TRX400EX TRX 400EX 400X 1051-3
eBay.com
2
$1,299.99
99-04 400EX Big Bore Stroker Kit 89mm Rebuild Complete Top Bottom 465Cc Assembly
US eBay
Free shipping
$1,299.99
99-04 400EX Big Bore Stroker Kit 89mm Rebuild Complete Top Bottom 465Cc Assembly
US eBay
Free shipping
$399.98
400EX 400X 89mm Hi Comp Big Bore Kit Race Gas 12.5:1 Piston +4 Rebuild 440Cc Kit
US eBay
1
Free shipping
$399.98
400EX 400X 89mm Hi Comp Big Bore Kit Race Gas 12.5:1 Piston +4 Rebuild 440Cc Kit
US eBay
1
$11.99
400EX Rancher 420 Air Filter 17254-HN1-000 For Honda Foreman 500 Rubicon 500 TRX500F TRX500FE TRX500FA TRX500FM Rancher 420 TRX420 TRX420FA1
Amazon.com
51
$11.99
400EX Rancher 420 Air Filter 17254-HN1-000 For Honda Foreman 500 Rubicon 500 TRX500F TRX500FE TRX500FA TRX500FM Rancher 420 TRX420 TRX420FA1
Amazon.com
51
$899.99
TRX 400EX TRX 400EX 88mm Big Bore Stage 2 Cam +1 Valves +3 Cylinder Hotcams KPMI
eBay.com
Free shipping
$899.99
TRX 400EX TRX 400EX 88mm Big Bore Stage 2 Cam +1 Valves +3 Cylinder Hotcams KPMI
eBay.com
Free shipping
$899.99
TRX 400EX 400X Assembled Head Assembly Stage 2 Hot Cam Chain Hotcam Camshaft Kit
US eBay
Free shipping
$899.99
TRX 400EX 400X Assembled Head Assembly Stage 2 Hot Cam Chain Hotcam Camshaft Kit
US eBay
Free shipping
$649.89
Honda TRX400EX Assembled Cylinder Head Stage 2 Hot Cams WISECO Chain Cometic Kit
US eBay
Free shipping
$649.89
Honda TRX400EX Assembled Cylinder Head Stage 2 Hot Cams WISECO Chain Cometic Kit
US eBay
Free shipping
$579.99
$863.42
TRX400EX TRX 400EX 87 416 HOTCAMS Stage 2 Big Bore Cylinder Cometic Top End Kit
eBay.com
Free shipping
32% off
$579.99
$863.42
TRX400EX TRX 400EX 87 416 HOTCAMS Stage 2 Big Bore Cylinder Cometic Top End Kit
eBay.com
Free shipping
$139.99
1999-2008 Honda TRX400EX Sportrax 440Cc 89mm Big Bore Jug Cylinder Top End Rebuild Kit Generic
VelocityTitan
$139.99
1999-2008 Honda TRX400EX Sportrax 440Cc 89mm Big Bore Jug Cylinder Top End Rebuild Kit Generic
VelocityTitan
Upgrading Your Honda 400ex Cam: A Step-by-Step Guide
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Upgrading Your Honda 400ex Cam: A Step-by-Step Guide
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TikToklfrperformance
Enhanced 400EX Modifications Showcase
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Enhanced 400EX Modifications Showcase
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Honda 400EX Engine and Exhaust Upgrades: How To Make A 400EX TRX450R Fast
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Honda 400EX Engine and Exhaust Upgrades: How To Make A 400EX …
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YouTubeATVonDemand
400ex/426ex ATV Build How to install Honda trx450r shocks
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400ex/426ex ATV Build How to install Honda trx450r shocks
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YouTubeGarageMC
"Watch us Transform This Honda TRX400EX in Just Minutes!" XC Build
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"Watch us Transform This Honda TRX400EX in Just Minutes!" XC B…
9.5K viewsMar 26, 2023
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Honda 400EX Suspension and Chassis Upgrades For The Trail and Racing: Improve your 400EX Handling
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Honda TRX 400EX Dual Pipes: Enhancing Your ATV Experience
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Honda TRX 400EX Dual Pipes: Enhancing Your ATV Experience
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HONDA TRX 400ex UPGRADES MODS - HQ HD 4K
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Honda TRX 400EX Engine Reassembly
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Honda TRX400EX Top End Rebuild | Part 3: Assembly Continued
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Honda 400EX | Motor blown / 440cc Big Bore Kit Motor Rebuild | Part …
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Honda TRX400EX Top End Rebuild | Part 2: Assembly
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Honda 400EX Top End Rebuild Part 1: Disassemble | Partzilla.com
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Proper valve adjustment of a Honda 400 Ex
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Honda 400EX XC Racing Upgrade Project Review
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16:45
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Shop Honda 400Ex Performance Upgrades

Sponsored
$82.99
Dynojet Stage 1 & 2 Carburetor Jet Kit Fits Honda TRX400EX Sportrax 400EX/TRX400EX Fourtrax 400EX
PartsGiant
23
Free shipping
$82.99
Dynojet Stage 1 & 2 Carburetor Jet Kit Fits Honda TRX400EX Sportrax 400EX/TRX400EX Fourtrax 400EX
PartsGiant
23
$649.89
TRX400EX 400EX Cylinder Head Stage 2 Hot Cams WISECO Chain Big Bore Cometic Kit
US eBay
Free shipping
$649.89
TRX400EX 400EX Cylinder Head Stage 2 Hot Cams WISECO Chain Big Bore Cometic Kit
US eBay
Free shipping
$329.95
Bbr Full Big Bore Kit W/Cam - 411-HXR-1001 | Speedaddicts.Com
Speed Addicts
$329.95
Bbr Full Big Bore Kit W/Cam - 411-HXR-1001 | Speedaddicts.Com
Speed Addicts
$699.99
TRX 400EX 400X XR 88m Big Bore Kit Stage 3 Hotcam Hot Cam +3 Top End Rebuild Kit
eBay.com
Free shipping
$699.99
TRX 400EX 400X XR 88m Big Bore Kit Stage 3 Hotcam Hot Cam +3 Top End Rebuild Kit
eBay.com
Free shipping
$717.49
TRX 400EX 400X Big Bore 89mm 440 Stage 3 Hotcam Kibblewhite Springs Top End Kit
US eBay
Free shipping
$717.49
TRX 400EX 400X Big Bore 89mm 440 Stage 3 Hotcam Kibblewhite Springs Top End Kit
US eBay
Free shipping
$129.99
Honda XR400R BIG BORE Top End Kit 440Cc 89mm 10:1 TRX400EX All Years 1996-2009
eBay.com
Free shipping
$129.99
Honda XR400R BIG BORE Top End Kit 440Cc 89mm 10:1 TRX400EX All Years 1996-2009
eBay.com
Free shipping
$549.98
Honda 400EX 87m Big Bore Kit Stage 2 Hotcam +2 Cylinder Piston 416Cc Top End Kit
eBay.com
1
Free shipping
$549.98
Honda 400EX 87m Big Bore Kit Stage 2 Hotcam +2 Cylinder Piston 416Cc Top End Kit
eBay.com
1
$242.99
$269.99
FMF Powercore 4 Complete Exhaust With Stainless Hi-Flo Header-Dirtbike Full System Exhaust 041501
Motosport
1
Free shipping
10% off
$242.99
$269.99
FMF Powercore 4 Complete Exhaust With Stainless Hi-Flo Header-Dirtbike Full System Exhaust 041501
Motosport
1
$86.95
2005-2008 Honda 400EX Rick's Motorsport Hot Shot CDI Ignition Boxes | Rick's Motorsport Electrics 15-618
Summit Racing
$86.95
2005-2008 Honda 400EX Rick's Motorsport Hot Shot CDI Ignition Boxes | Rick's Motorsport Electrics 15-618
Summit Racing
$699.99
TRX 400EX 400X XR 88m Big Bore Kit Stage 3 Hotcam Hot Cam +3 Top End Rebuild Kit
US eBay
Free shipping
$699.99
TRX 400EX 400X XR 88m Big Bore Kit Stage 3 Hotcam Hot Cam +3 Top End Rebuild Kit
US eBay
Free shipping
$649.89
Honda TRX400EX Assembled Cylinder Head Stage 2 Hot Cams WISECO Chain Cometic Kit
eBay.com
Free shipping
$649.89
Honda TRX400EX Assembled Cylinder Head Stage 2 Hot Cams WISECO Chain Cometic Kit
eBay.com
Free shipping
$251.99
$279.99
FMF Powercore 4 Complete Exhaust With Stainless Hi-Flo Header-Dirtbike Full System Exhaust 041533
Motosport
1
Free shipping
10% off
$251.99
$279.99
FMF Powercore 4 Complete Exhaust With Stainless Hi-Flo Header-Dirtbike Full System Exhaust 041533
Motosport
1
$649.89
Honda TRX400EX Assembled Cylinder Head Stage 2 Hot Cams WISECO Chain Cometic MLS
eBay.com
Free shipping
$649.89
Honda TRX400EX Assembled Cylinder Head Stage 2 Hot Cams WISECO Chain Cometic MLS
eBay.com
Free shipping
$569.99
TRX400EX TRX 400EX Stage 2 Hotcam Cylinder Wiseco Piston Top End Rebuild Kit
eBay.com
Free shipping
$569.99
TRX400EX TRX 400EX Stage 2 Hotcam Cylinder Wiseco Piston Top End Rebuild Kit
eBay.com
Free shipping
$525.99
1999-2004 Honda 400EX Wiseco Crankshaft Kits | Wiseco WPC131A
Summit Racing
7
Free shipping
$525.99
1999-2004 Honda 400EX Wiseco Crankshaft Kits | Wiseco WPC131A
Summit Racing
7
$688.89
Honda TRX 400EX Assembled Cylinder Head Stage 3 Hot Cams Chain Big Bore Cometic
eBay.com
Free shipping
$688.89
Honda TRX 400EX Assembled Cylinder Head Stage 3 Hot Cams Chain Big Bore Cometic
eBay.com
Free shipping
$496.97
2005-2008 Honda 400EX Wiseco Crankshaft Kits | Wiseco WPC131B
Summit Racing
5
Free shipping
$496.97
2005-2008 Honda 400EX Wiseco Crankshaft Kits | Wiseco WPC131B
Summit Racing
5
$251.99
$279.99
FMF Powercore 4 Complete Race Exhaust Stainless Hi-Flo Header-Dirtbike Full System Exhaust 044136
Motosport
17
Free shipping
10% off
$251.99
$279.99
FMF Powercore 4 Complete Race Exhaust Stainless Hi-Flo Header-Dirtbike Full System Exhaust 044136
Motosport
17