Honda 400 Overview


The light bulb went on. Revamping his ST70 based prototype to accept the new low pressure rolling stock, he went to work on his own tire design, ending up with a 22 inch tire inflated to 2. 2 psi. With the tire dilemma solved, the 70cc engine lacked the muscle necessary to push a full sized rider through snow or mud. A 90cc engine running through a special dual range four speed gearbox added the requisite flexibility over varied terrain. The next phase of development was optimizing the chassis to match the new engine and tires.

Kibblewhite Honda TRX 400EX 400X Stronger Heavy Duty Cylinder Head Studs Kit


Kibblewhite Honda TRX 400EX 400X Stronger Heavy Duty Cylinder Head Studs Kit

$69.99

2005 Honda Trx 400ex Aftermarket Oil Tank Bottle Reservoir


2005 Honda Trx 400ex Aftermarket Oil Tank Bottle Reservoir

$89.95

99-04 honda 400ex SEAT Bolt On Ready!!! TRX400ex COMPLETE SEAT


99-04 honda 400ex SEAT Bolt On Ready!!! TRX400ex COMPLETE SEAT "HT3"

$69.99

 2001 01 Honda 400EX Rear Skid Plate


2001 01 Honda 400EX Rear Skid Plate

$55.00

HONDA 400EX SEAT 2004-2007 BRAND NEW GENUINE HONDA SEAT TRX 400 FAST SHIP


HONDA 400EX SEAT 2004-2007 BRAND NEW GENUINE HONDA SEAT TRX 400 FAST SHIP

$79.99

Honda 400EX AIR SHROUDS & BOLTS AIR Engine Cooler Scoop Kit STICKERS ✅FAST SHIP✅


Honda 400EX AIR SHROUDS & BOLTS AIR Engine Cooler Scoop Kit STICKERS ✅FAST SHIP✅

$49.99

Honda Trx400ex Subframe


Honda Trx400ex Subframe

$51.99

Honda Trx400ex TRX 400ex 440cc Big Bore Cylinder Piston Rings Top End Kit 99-08


Honda Trx400ex TRX 400ex 440cc Big Bore Cylinder Piston Rings Top End Kit 99-08

$124.95

400EX DASH PANEL IGNITION  2005-2007 GENUINE HONDA TRX400 KEY SWITCH


400EX DASH PANEL IGNITION 2005-2007 GENUINE HONDA TRX400 KEY SWITCH

$46.99

Honda 400EX Front Tires 21x7-10 Kenda Max AT Pair 1999-2014 300EX 450R YFZ


Honda 400EX Front Tires 21x7-10 Kenda Max AT Pair 1999-2014 300EX 450R YFZ

$72.21

For Honda Sportrax TRX400EX 400EX Cylinder Piston Gasket Top End Kit 99-08 2001


For Honda Sportrax TRX400EX 400EX Cylinder Piston Gasket Top End Kit 99-08 2001

$58.98

Honda Trx400ex 99-04 Hot Rods Stroker Crank


Honda Trx400ex 99-04 Hot Rods Stroker Crank

$110.00

Honda 400ex  CNC foot peg extensions HEPatv new


Honda 400ex CNC foot peg extensions HEPatv new

$49.99

HONDA TRX400EX TRX 400EX  Cylinder Head Repair KIT Rocker Arm Valve 1999-2015


HONDA TRX400EX TRX 400EX Cylinder Head Repair KIT Rocker Arm Valve 1999-2015

$64.99

Honda 400ex full skid plate 1999-2004 guard aluminum skid plate motor guard YV2


Honda 400ex full skid plate 1999-2004 guard aluminum skid plate motor guard YV2"

$69.99

HONDA 400EX HD HEAD STUDS -  Stripped or Blown Head Gasket Fix - TRX400EX XR400


HONDA 400EX HD HEAD STUDS - Stripped or Blown Head Gasket Fix - TRX400EX XR400

$52.99

Honda TRX 400 FW Foreman Kill/Light/Hi/Low/Starter Switch 1998-2003 NEW!


Honda TRX 400 FW Foreman Kill/Light/Hi/Low/Starter Switch 1998-2003 NEW!

$51.29

1999-2012 Honda 400ex Works Shocks!


1999-2012 Honda 400ex Works Shocks!

$100.00

400EX Headlight LIGHTS 1999-2004 GENUINE HONDA TRX400 LIGHT


400EX Headlight LIGHTS 1999-2004 GENUINE HONDA TRX400 LIGHT "V-1"

$49.99

Honda CBR400RR Seat Cover 1993 To 1994 Diamond Pleated Black Color #G63TRQW098


Honda CBR400RR Seat Cover 1993 To 1994 Diamond Pleated Black Color #G63TRQW098

$99.99

Honda CB400F Seat Cover 1989 To 1990 Carbon Fiber Black Color #7RE64UYTH6


Honda CB400F Seat Cover 1989 To 1990 Carbon Fiber Black Color #7RE64UYTH6

$89.99

Honda 99-07 Sportrax TRX 400ex 96-04 Xr400r OEM Cylinder Jug 8045


Honda 99-07 Sportrax TRX 400ex 96-04 Xr400r OEM Cylinder Jug 8045

$99.99

HONDA 400EX SEAT 1999-2008 BRAND NEW GENUINE HONDA SEAT TRX 400 FAST SHIP


HONDA 400EX SEAT 1999-2008 BRAND NEW GENUINE HONDA SEAT TRX 400 FAST SHIP

$119.99

Honda TRX400X 08 & up Embossed Flame Seat Cover TG20182635


Honda TRX400X 08 & up Embossed Flame Seat Cover TG20182635

$79.99

2006 Honda Rancher 400 Front Differential


2006 Honda Rancher 400 Front Differential

$139.00

1999-2004 Honda TRX400EX TRX 400EX HEADLIGHT #50


1999-2004 Honda TRX400EX TRX 400EX HEADLIGHT #50

$60.00

2000 Honda Sportrax TRX 400ex OIL MOD Clutch Valve Rocker Cover 8045


2000 Honda Sportrax TRX 400ex OIL MOD Clutch Valve Rocker Cover 8045

$149.99

Honda 400 ex After market header heat shield HEPatv


Honda 400 ex After market header heat shield HEPatv

$49.99

Cylinder Piston Gasket Top End Kit for Honda Sportrax TRX400EX 1999-2008


Cylinder Piston Gasket Top End Kit for Honda Sportrax TRX400EX 1999-2008

$64.95

New Honda 400EX 400 EX SWINGARM SLEEVE SEALS BEARINGS and pivot bolt set KIT


New Honda 400EX 400 EX SWINGARM SLEEVE SEALS BEARINGS and pivot bolt set KIT

$65.95

Honda TRX 400EX 400X Top End Rebuild Repair Kit Wiseco Piston Gaskets Cylinder


Honda TRX 400EX 400X Top End Rebuild Repair Kit Wiseco Piston Gaskets Cylinder

$239.99

Carburetor For Honda Rancher 400 TRX400 TRX400FA TRX400FGA


Carburetor For Honda Rancher 400 TRX400 TRX400FA TRX400FGA

$52.95

Honda NS400R Kickstand Fairing 


Honda NS400R Kickstand Fairing 

$50.00

Honda 300EX to 400EX Shock Conversion or Lowering Kit


Honda 300EX to 400EX Shock Conversion or Lowering Kit

$59.99

Honda 400EX TRX400 TRX400EX Sportrax 2002 02 air box cleaner filter K


Honda 400EX TRX400 TRX400EX Sportrax 2002 02 air box cleaner filter K

$46.95

99-04 HONDA 400EX FRAME CHASSIS GENUINE HONDA fits 1999-2004 400EX


99-04 HONDA 400EX FRAME CHASSIS GENUINE HONDA fits 1999-2004 400EX

$199.99

2005 honda trx400ex 400ex crankshaft crank


2005 honda trx400ex 400ex crankshaft crank

$95.00

Honda CB400F CB 400 400F Super Sport 1975 75 muffler exhaust pipe silencer


Honda CB400F CB 400 400F Super Sport 1975 75 muffler exhaust pipe silencer

$485.00



Production of three wheelers ceased in 1987 due to safety concerns: three wheelers were more unstable than four wheelers although accidents are equally severe in both classes. The duration of the voluntary cease of production manufacturers were not required to halt production but agreed to it lasted 10 years and thus since 1997, manufacturers were free to once again manufacture and market three wheelers. A ban on sales of new or used three wheelers and a recall of all remaining three wheelers has been proposed by the American Academy of Pediatrics. However, it was determined in a CPSC study that three wheelers are no more dangerous than other ATV's. The ban lead to widespread thought that the machines are unregistrable, uninsurable, dangerous, and even illegal, but is false. These safety issues with three wheel ATVs caused all ATV manufacturers to upgrade to four wheel models in the late 1980s, and three wheel models ended production in 1988, due to consent decrees between the major manufacturers and the Consumer Product Safety Commission—the result of legal battles over safety issues among consumer groups, the manufacturers and CPSC. The lighter weight of the three wheel models made them popular with expert riders. Cornering is more challenging than with a four wheeled machine because leaning into the turn is even more important, to counterbalance the weight and keep the machine stable. Operators may roll over if caution isn't used at high speeds. The front end of three wheelers obviously has a single wheel, making it lighter, and flipping backwards is a potential hazard, especially when climbing hills. Rollovers may also occur when traveling down a very steep incline.


Recent Deals:

Kibblewhite Honda TRX 400EX 400X Stronger Heavy Duty Cylinder Head Studs Kit2005 Honda Trx 400ex Aftermarket Oil Tank Bottle Reservoir99-04 honda 400ex SEAT Bolt On Ready!!! TRX400ex COMPLETE SEAT "HT3" 2001 01 Honda 400EX Rear Skid Plate HONDA 400EX SEAT 2004-2007 BRAND NEW GENUINE HONDA SEAT TRX 400 FAST SHIPHonda 400EX AIR SHROUDS & BOLTS AIR Engine Cooler Scoop Kit STICKERS ✅FAST SHIP✅Honda Trx400ex SubframeHonda Trx400ex TRX 400ex 440cc Big Bore Cylinder Piston Rings Top End Kit 99-08400EX DASH PANEL IGNITION 2005-2007 GENUINE HONDA TRX400 KEY SWITCHHonda 400EX Front Tires 21x7-10 Kenda Max AT Pair 1999-2014 300EX 450R YFZFor Honda Sportrax TRX400EX 400EX Cylinder Piston Gasket Top End Kit 99-08 2001Honda Trx400ex 99-04 Hot Rods Stroker CrankHonda 400ex CNC foot peg extensions HEPatv newHONDA TRX400EX TRX 400EX Cylinder Head Repair KIT Rocker Arm Valve 1999-2015Honda TRX 400 FW Foreman Kill/Light/Hi/Low/Starter Switch 1998-2003 NEW!Honda 400ex full skid plate 1999-2004 guard aluminum skid plate motor guard YV2"HONDA 400EX HD HEAD STUDS - Stripped or Blown Head Gasket Fix - TRX400EX XR4001999-2012 Honda 400ex Works Shocks! 400EX Headlight LIGHTS 1999-2004 GENUINE HONDA TRX400 LIGHT "V-1"Honda CBR400RR Seat Cover 1993 To 1994 Diamond Pleated Black Color #G63TRQW098Honda CB400F Seat Cover 1989 To 1990 Carbon Fiber Black Color #7RE64UYTH6Honda 99-07 Sportrax TRX 400ex 96-04 Xr400r OEM Cylinder Jug 8045HONDA 400EX SEAT 1999-2008 BRAND NEW GENUINE HONDA SEAT TRX 400 FAST SHIPHonda TRX400X 08 & up Embossed Flame Seat Cover TG201826352006 Honda Rancher 400 Front Differential1999-2004 Honda TRX400EX TRX 400EX HEADLIGHT #502000 Honda Sportrax TRX 400ex OIL MOD Clutch Valve Rocker Cover 8045Honda 400 ex After market header heat shield HEPatvCylinder Piston Gasket Top End Kit for Honda Sportrax TRX400EX 1999-2008New Honda 400EX 400 EX SWINGARM SLEEVE SEALS BEARINGS and pivot bolt set KITCarburetor For Honda Rancher 400 TRX400 TRX400FA TRX400FGA Honda NS400R Kickstand Fairing Honda 300EX to 400EX Shock Conversion or Lowering KitHonda 400EX TRX400 TRX400EX Sportrax 2002 02 air box cleaner filter K99-04 HONDA 400EX FRAME CHASSIS GENUINE HONDA fits 1999-2004 400EXHonda CB400F CB 400 400F Super Sport 1975 75 muffler exhaust pipe silencer Honda TRX 400EX 400X Top End Rebuild Repair Kit Wiseco Piston Gaskets Cylinder1999-2014 Honda TRX400EX PRO-X Timing Chain / Cam Chain TRX 400EX 400X