1981 ATC185S Specifications

General Specs
Model CodeTB05
Product Code958
Frame VIN LocationStamped into left side of frame neck
Engine Serial LocationStamped on bottom of left crankcase cover
Frame Starting NumberJH3TB010*BC100008
Engine Starting NumberTB01E-2100001
Owner Manual3195801
Service Manual14958AE7
Length1720 mm (67.7 in)
Width1000 mm (39.4 in)
Height965 mm (38 in)
Seat Height667 mm (26.3 in)
Wheelbase1118 mm (44 in)
Ground Clearance110 mm (4.3 in)
Dry Weight127 kg (280 lb)
Caster Angle19.67°
Trail20 mm (0.79 in)
Tire & Rim
Front Tire Size (HxW-R)22x11-8
Rear Tire Size (HxW-R)22x11-8
Front Rim Size (W x H)8.27x8 in
Rear Rim Size (W x H)8.27x8 in
Engine TypeOHC single cylinder 4 stroke air cooled
Cylinder ArrangementSingle cylinder inclined 15 degrees
Valve TrainOverhead camshaft - chain drive
Displacement180.2 cc (11 ci)
Bore63 mm (2.5 in)
Stroke57.8 mm (2.3 in)
Compression Ratio8:1
Cylinder Compression980-1177 kPa (142-171 psi)
Horsepower13.2 PS (13 hp)
Torque1.38 kg/m3 (10 ft-lb)
Starter TypeRecoil
Oil Capacity - Total1.35 L (1.4 US qt; 1.2 Imp qt)
Oil Capacity - Oil Change1.3 L (1.4 US qt; 1.1 Imp qt)
Engine Dry Weight30.2 kg (66.6 lb)
Drive Train & Transmission
Clutch TypeAutomatic wet multidisc centrifugal
Transmission Type5 speed constant mesh
Primary Reduction3.333
First Gear2.769
Second Gear1.722
Third Gear1.273
Fourth Gear1.000
Fifth Gear0.815
Final Reduction3.727
Gear Shift PatternN - 1 - 2 - 3 - 4 - 5
Drive Chain (Size/Links)520/82
Identification MarkPD35A
TypePiston valve
Throttle Bore22 mm (0.9 in)
Main Jet#95
Pilot Jet/Slow Jet#38
Jet Needle Clip Position2nd Groove
Pilot Screw Adjustment2 Turns out
Float Level12.5 mm (0.5 in)
Engine Idle1400 RPM
Fuel Tank Capacity8.8 L (2.3 US gal; 1.9 Imp gal)
Fuel Tank Reserve1.6 L (0.4 US gal; 0.4 Imp gal)
Ignition TypeCDI
CDI Identification MarkCI-08
Spark PlugD8EA (NGK) - US
X24ES-U (Denso) - US
X24ESR-U (Denso) - CAN
Spark Plug Gap Max0.6-0.7 mm (0.024-0.028 in)
Pulse Generator20-60 Ω
Pulse Generator Gap Max0.30-0.40 mm (0.012-0.016 in)
Exciter Coil245 Ω
Ignition Coil Primary0.2-0.8 Ω
Ignition Coil Secondary w/o Cap8000-15000 Ω
Initial Ignition Timing10.0° BTDC
Full Advance Ignition Timing30.0° BTDC
Ignition Advancement TypeMechanical & Electronic
Voltage12 V
Alternator Max Output50 W
Alternator Max Output RPM5000 RPM
Front Brake OperationRight hand
Rear Brake OperationLeft hand & right foot
Front Brake TypeDrum
Rear Brake TypeDrum
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.