1997 TRX90 Specifications

General Specs
Model CodeTE18
Product CodeHF7
Frame VIN LocationStamped on front of frame
Engine Serial LocationStamped on bottom of left crankcase cover
Frame Starting NumberJH3TE180*VK200001
Engine Starting NumberTE18E2014605
Owner Manual31HF7640
Service Manual61HF712
Length1489 mm (58.6 in)
Width895 mm (35.2 in)
Height917 mm (36.1 in)
Seat Height648 mm (25.5 in)
Wheelbase985 mm (38.8 in)
Ground Clearance100 mm (3.9 in)
Curb Weight115 kg (253.6 lb)
Dry Weight110 kg (242.6 lb)
Caster Angle
Trail16 mm (0.63 in)
Tire & Rim
Front Tire Size (HxW-R)20x7-8
Rear Tire Size (HxW-R)19x8-8
Engine TypeOHC single cylinder 4 stroke air cooled
Valve TrainOverhead camshaft - chain drive
Displacement86 cc (5.2 ci)
Bore47 mm (1.9 in)
Stroke49.5 mm (1.9 in)
Compression Ratio9.2:1
Cylinder Compression1177 kPa (171 psi)
Horsepower6.1 PS (6 hp)
Starter TypeRecoil
Oil Capacity - Total0.9 L (1 US qt; 0.8 Imp qt)
Oil Capacity - Oil Change0.7 L (0.7 US qt; 0.6 Imp qt)
Engine Dry Weight19.8 kg (43.7 lb)
Drive Train & Transmission
Clutch TypeAutomatic
Transmission Type4 Speed
Primary Reduction4.058
First Gear2.833
Second Gear1.937
Third Gear1.300
Fourth Gear0.958
Final Reduction3.846
Gear Shift PatternN - 1 - 2 - 3 - 4
Drive Chain (Size/Links)428/98
Identification MarkPB1AA
TypePiston valve
Throttle Bore16 mm (0.6 in)
Main Jet#80
Pilot Jet/Slow Jet#40
Jet Needle Clip Position3rd Groove
Pilot Screw Adjustment1 3/8 turns out
Float Level10.7 mm (0.4 in)
Engine Idle1600 RPM
Air Filter TypeUrethane foam and screen
Fuel Tank Capacity6 L (1.6 US gal; 1.3 Imp gal)
Fuel Tank Reserve1.3 L (0.3 US gal; 0.3 Imp gal)
Ignition TypeCDI
CDI Identification MarkCI630 (HF7)
Spark PlugCR7HSA (NGK)
U22FSR-U (Denso)
Spark Plug Gap Max0.6-0.7 mm (0.024-0.028 in)
Pulse Generator50-200 Ω
Pulse Generator Peak Voltage0.7 V minimum
Exciter Coil400-800 Ω
Exciter Coil Peak Voltage100 V minimum
Ignition Coil Primary0.19-0.23 Ω
Ignition Coil Secondary w/o Cap2800-3400 Ω
Ignition Coil Secondary w/ Cap7800-8400 Ω
Primary Coil Peak Voltage100 V minimum
Initial Ignition Timing7.0° BTDC
Full Advance Ignition Timing30.0° BTDC
Voltage12 V
Front Brake TypeDrum
Rear Brake TypeDrum
Front SuspensionIndependent
Rear SuspensionSwingarm
Front Wheel Travel65 mm (2.6 in)
Rear Wheel Travel65 mm (2.6 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.