1987 TRX125 Specifications

General Specs
ManufacturerHonda
Year1987
ModelTRX125
Model NameFourtrax 125
Model CodeTE05
Product CodeHC3
Frame VIN LocationStamped on front of frame
Engine Serial LocationStamped on bottom of left crankcase cover
Frame Starting NumberJH3TE050*HK200001
Engine Starting NumberTE05E-5000001
Owner Manual31HC3600
Service Manual61HC300
Chassis
Length1600 mm (63 in)
Width1000 mm (39.4 in)
Height970 mm (38.2 in)
Seat Height700 mm (27.6 in)
Wheelbase1060 mm (41.7 in)
Ground Clearance115 mm (4.5 in)
Dry Weight136 kg (299.9 lb)
Caster Angle
Trail32 mm (1.26 in)
Tire & Rim
Front Tire Size20x7-8
Rear Tire Size22x11-8
Front Rim Size5.5x8
Rear Rim Size8.25x8
Engine
Engine TypeOHC single cylinder 4 stroke air cooled
Cylinder ArrangementSingle cylinder inclined 25 degrees from vertical
Valve TrainOverhead camshaft - chain drive
Displacement124.8 cc (7.6 ci)
Bore54 mm (2.1 in)
Stroke54.5 mm (2.1 in)
Compression Ratio9:1
Cylinder Compression1206-1402 kPa (175-203 psi)
Horsepower9.4 PS (9.3 hp)
Torque0.96 kg/m3 (6.9 ft-lb)
Starter TypeElectric and recoil
Fuel TypeRegular Gasoline
Oil Capacity - Total1.3 L (1.4 US qt; 1.1 Imp qt)
Oil Capacity - Oil Change1.1 L (1.2 US qt; 1 Imp qt)
Engine Dry Weight31.2 kg (68.8 lb)
Drive Train & Transmission
Clutch TypeAutomatic wet multiplate centrifugal
Transmission Type5 speed constant mesh with reverse
Primary Reduction3.737
First Gear3.250
Second Gear2.188
Third Gear1.550
Fourth Gear1.167
Fifth Gear0.923
Reverse4.593
Final Reduction4.000
Gear Shift PatternForward: N - 1 - 2 - 3 - 4 - 5
Reverse: N - R
DrivelineChain
Carburetor
BrandKeihin
Identification MarkPD55B
TypePiston valve
Main Jet#92
Pilot Jet/Slow Jet#35
Jet Needle Clip Position2nd Groove
Pilot Screw Adjustment1 3/8 Turns out
Float Level10.7 mm (0.4 in)
Engine Idle1500 RPM
Fuel Tank Capacity7.5 L (2 US gal; 1.6 Imp gal)
Fuel Tank Reserve1.5 L (0.4 US gal; 0.3 Imp gal)
Ignition
Ignition TypeCDI
CDI Identification MarkCI540 (HC3)
Spark PlugDR8ES-L (NGK)
X24ESR-U (Denso)
Spark Plug Gap Max0.6-0.7 mm (0.024-0.028 in)
Pulse Generator290-360 Ω
Exciter Coil100-300 Ω
Lighting Coil0.1-1 Ω
Ignition Coil Primary0.1-0.3 Ω
Ignition Coil Secondary w/o Cap3700-4500 Ω
Ignition Coil Secondary w/ Cap7400-11000 Ω
Initial Ignition Timing10.0° BTDC
Full Advance Ignition Timing28.0° BTDC
Ignition Advancement TypeElectronic
Electrical
Voltage12 V
Power TypeDC
Alternator Max Output130 W
Alternator Max Output RPM5000 RPM
Regulator Voltage13.5-15.5 V
Brakes
Front Brake TypeCable operated drum
Rear Brake TypeCable operated drum
Suspension
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.