2003 TRX400EX Specifications

General Specs
Model NameSportrax 400EX
Model CodeTE23
Product CodeHN1
Frame VIN LocationStamped on front of frame
Engine Serial LocationStamped on bottom of left crankcase cover
Frame Starting Number478TE230*34300001
478TE232*34300001 (Canada)
478TE23U*34300001 (Australia)
Engine Starting NumberTE23E8000001
Owner Manual31HN1640
Service Manual61HN105
Length1835 mm (72.2 in)
Width1150 mm (45.3 in)
Height1110 mm (43.7 in)
Seat Height810 mm (31.9 in)
Wheelbase1230 mm (48.4 in)
Ground Clearance110 mm (4.3 in)
Curb Weight178 kg (392.5 lb)
Dry Weight170 kg (374.9 lb)
Caster Angle6.5°
Trail28 mm (1.1 in)
Tire & Rim
Front Tire Size (HxW-R)22x7-10
Rear Tire Size (HxW-R)20x10-9
Engine Type4 Stroke Air Cooled
Cylinder ArrangementSingle cylinder
Displacement397 cc (24.2 ci)
Bore85 mm (3.3 in)
Stroke70 mm (2.8 in)
Compression Ratio9.1:1
Cylinder Compression686-883 kPa (99-128 psi)
Starter TypeElectric
Oil Capacity - Total2.2 L (2.3 US qt; 1.9 Imp qt)
Oil Capacity - Oil Change1.8 L (1.9 US qt; 1.6 Imp qt)
Engine Dry Weight41.5 kg (91.5 lb)
Drive Train & Transmission
Clutch TypeManual
Transmission Type5 Speed
Primary Reduction2.826
First Gear2.916
Second Gear1.937
Third Gear1.473
Fourth Gear1.181
Fifth Gear1.000
Final Reduction2.533
Gear Shift Pattern1 - N - 2 - 3 - 4 - 5
Drive Chain (Size/Links)520/94
Identification MarkQB10A
TypePiston valve
Throttle Bore38 mm (1.5 in)
Main Jet#148
Pilot Jet/Slow Jet#38
Jet Needle Clip Position3rd Groove
Pilot Screw Adjustment2 1/4 Turns out
Float Level18.5 mm (0.7 in)
Engine Idle1400 RPM
Air Filter TypeOiled urethane foam
Fuel Tank Capacity10 L (2.6 US gal; 2.2 Imp gal)
Fuel Tank Reserve1.6 L (0.4 US gal; 0.4 Imp gal)
Ignition TypeAC-CDI
CDI Identification MarkCI718 (HN1)
Spark PlugDPR8Z (NGK)
X24GPR-U (Denso)
Spark Plug Gap Max0.6-0.7 mm (0.024-0.028 in)
Pulse Generator Peak Voltage0.7 V minimum
Exciter Coil Peak Voltage100 V minimum
Lighting Coil0.1-1 Ω
Primary Coil Peak Voltage100 V minimum
Initial Ignition Timing8.0° BTDC
Voltage12 V
Power TypeDC
Alternator Max Output147 W
Alternator Max Output RPM5000 RPM
Regulator VoltageLess than 15.5 V
Front Brake TypeDual hydraulic disc
Rear Brake TypeHydraulic disc
Front SuspensionDouble wishbone
Rear SuspensionSwingarm
Front Wheel Travel209 mm (8.2 in)
Rear Wheel Travel230 mm (9.1 in)

Information on this page is provided in good faith that it is accurate, but in no way is the data guanteed to be accurate. If there are any mistakes, please contact me.