Technical Data


For all years unless indicated otherwise

All measurments are to Honda Specifications and in millimetres (mm)

Engine

Item:                             Measurment:
Cylinder I.D.                     70.00-70.01
Piston O.D.                       69.93-69.95
Piston pin hole I.D.              18.002-18.008
Piston pin O.D.                   17.992-18.000
Piston ring side clearance    top 0.045-0.075   
                              2nd 0.025-0.055
Piston Ring Gap               top 0.2-0.4
                              2nd 0.2-0.4
Connecting rod small end I.D.     21.997-22.009
Connecting rod big end axial      0.2-0.4
Connecting rod big end radial     0.010-0.022
Crankshaft runout                 0.04 max

Carburetor


Item                              Measurement
Float Height                      20.0

Electrical


Item                              Measurement
3-point spark gap (77-80)         6/3000 rpm
Point gap (77-80)                 0.3-0.4
Plug Gap                          0.7-0.8

Steering


Item                              Measurement
Throttle lever free play          6.0
Throttle lever full travel        36.0
Steering wheel force to turn      2.5-3.5 kg (5.51-7.72 lbs.)
Steering Shaft O.D.               17.957-18.000
Column bushing I.D.               17.9-18.3
Shaft bushing I.D.                18.06-18.081

Front Suspension


Item                              Measurment
Shock spring free length          229.4
Front arm pivot pin I.D.          42.58-42.62
Front arm king pin I.D.           14.03-14.06
Front arm pivot pin O.D.          42.47-42.50
Front arm king pin I.D.           13.97-13.98
Toe-in                            8.0

Brakes


Item                              Measurement
Brake lever free play             3.0
Brake lever full travel           70.0
Brake lever remaing effective     above 20.0
Parking Brake                     1-5 notches
Disc runout                       max 0.3
Disc thickness                    3.2
Brake lining thickness (new)      4.25
Brake lining thickness (worn)     min 1.5
Brake drum I.D.                   139.9-140.1

This page hosted by GeoCities Get your own Free Home Page


1