1987 TRX70 Specifications

General Specs
Model NameFourtrax 70
Model CodeTE10
Product CodeHB2
Frame VIN LocationStamped on right side of frame under foot peg
Engine Serial LocationStamped on bottom of left crankcase cover
Frame Starting NumberJH3TE100*HC100001
Engine Starting NumberTE01E-2100001
Owner Manual31HB2610
Service Manual61HB201
Length1305 mm (51.4 in)
Width795 mm (31.3 in)
Height795 mm (31.3 in)
Seat Height570 mm (22.4 in)
Wheelbase895 mm (35.2 in)
Ground Clearance85 mm (3.3 in)
Dry Weight86.5 kg (190.7 lb)
Caster Angle
Trail22.6 mm (0.89 in)
Tire & Rim
Front Tire Size (HxW-R)16x8-7
Rear Tire Size (HxW-R)16x8-7
Engine TypeOHC single cylinder 4 stroke air cooled
Cylinder ArrangementSingle cylinder inclined 75 degrees from vertical
Valve TrainOverhead camshaft - chain drive
Displacement72 cc (4.4 ci)
Bore47 mm (1.9 in)
Stroke41.4 mm (1.6 in)
Compression Ratio7.5:1
Cylinder Compression1050-1350 kPa (152-196 psi)
Horsepower3.8 PS (3.7 hp)
Torque0.47 kg/m3 (3.4 ft-lb)
Starter TypeRecoil
Fuel TypeRegular Gasoline
Oil Capacity - Total0.8 L (0.8 US qt; 0.7 Imp qt)
Oil Capacity - Oil Change0.7 L (0.7 US qt; 0.6 Imp qt)
Drive Train & Transmission
Clutch TypeAutomatic wet multiplate centrifugal
Transmission Type4 speed constant mesh
Primary Reduction4.059
First Gear3.273
Second Gear1.938
Third Gear1.350
Fourth Gear1.043
Final Reduction2.769
Gear Shift PatternN - 1 - 2 - 3 - 4
Identification MarkPB86A
TypePiston valve
Throttle Bore13 mm (0.5 in)
Main Jet#62
Pilot Jet/Slow Jet#38
Jet Needle Clip Position3rd Groove
Pilot Screw Adjustment1 1/8 Turns out
Float Level10.7 mm (0.4 in)
Engine Idle1700 RPM
Ignition TypeCDI
CDI Identification MarkCF505 (HB2)
Spark PlugCR7HS (NGK), U22FSR-U (Denso)
Spark Plug Gap Max0.6-0.7 mm (0.024-0.028 in)
Pulse Generator80-120 Ω
Exciter Coil464-696 Ω
Ignition Coil Primary0.1-0.2 Ω
Ignition Coil Secondary w/o Cap3690-4510 Ω
Full Advance Ignition Timing25.0° BTDC
Front Brake OperationRight Hand
Rear Brake OperationLeft Hand
Front Brake TypeCable operated drum
Rear Brake TypeCable operated drum
Front SuspensionRigid
Rear SuspensionRigid

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.