2003 TRX300EX Specifications

General Specs
Model NameSporttrax 300EX
Model CodeTE19
Product CodeHM3
Frame VIN LocationStamped on front of frame
Engine Serial LocationOn top of right side cover directly under exhaust pipe
Frame Starting NumberJH3TE190*3K800001
JH3TE192*3K800001 - Canada
Engine Starting NumberTE19E2200001
Service Manual61HM354
Length1720 mm (67.7 in)
Width1105 mm (43.5 in)
Height1085 mm (42.7 in)
Seat Height770 mm (30.3 in)
Wheelbase1150 mm (45.3 in)
Ground Clearance125 mm (4.9 in)
Curb Weight177 kg (390.3 lb)
Dry Weight171 kg (377.1 lb)
Caster Angle
Trail32 mm (1.26 in)
Tire & Rim
Front Tire Size (HxW-R)22x7-10
Rear Tire Size (HxW-R)22x10-9
Front Rim Size (W x H)5.5x10
Rear Rim Size (W x H)8x9
Engine TypeOHC single cylinder 4 stroke air cooled
Valve TrainOverhead camshaft - chain drive
Displacement281.7 cc (17.2 ci)
Bore74 mm (2.9 in)
Stroke65.5 mm (2.6 in)
Compression Ratio8.9:1
Cylinder Compression1175-1375 kPa (170-199 psi)
Horsepower21.3 PS (21 hp)
Starter TypeElectric
Oil Capacity - Total2 L (2.1 US qt; 1.8 Imp qt)
Oil Capacity - Oil Change1.6 L (1.7 US qt; 1.4 Imp qt)
Engine Dry Weight42.8 kg (94.4 lb)
Drive Train & Transmission
Clutch TypeManual
Transmission Type5 Speed with reverse
Primary Reduction2.833
First Gear3.692
Second Gear2.529
Third Gear1.857
Fourth Gear1.458
Fifth Gear1.178
Final Reduction2.923
Gear Shift PatternR/1 - N - 2 - 3 - 4 - 5
Drive Chain (Size/Links)520/86
Identification MarkQB02B
TypePiston valve
Throttle Bore29 mm (1.1 in)
Main Jet#122
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 TypeUrethane and screen
Fuel Tank Capacity8.5 L (2.2 US gal; 1.9 Imp gal)
Fuel Tank Reserve1.8 L (0.5 US gal; 0.4 Imp gal)
Ignition TypeCDI
CDI Identification MarkCI632 (HM3)
Spark PlugDR8ES-L (NGK)
X24ESR-U (Denso)
Spark Plug Gap Max0.6-0.7 mm (0.024-0.028 in)
Pulse Generator Peak Voltage0.7 V minimum
Primary Coil Peak Voltage100 V minimum
Initial Ignition Timing17.0° BTDC
Full Advance Ignition Timing33.0° BTDC
Voltage12 V
Power TypeDC
Alternator Max Output240 W
Alternator Max Output RPM5000 RPM
Regulator Voltage14-15.5 V
Front Brake TypeDual hydraulic disc
Rear Brake TypeHydraulic disc
Front SuspensionDouble wishbone
Rear SuspensionSwingarm
Front Wheel Travel170 mm (6.7 in)
Rear Wheel Travel200 mm (7.9 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.