kxr 50 90 Workshop-manual : Page 5

          1. GENERAL INFORMATION                                                                                                              Mongoose/KXR 90/50

SPECIFICATIONS
(Mongoose/KXR 90)
Name & Model No.                      LA20AB                                                       Air cleaner type & No                      Sponge




                                                          Fuel System
Motorcycle Name & Type           Mongoose/KXR 90                                                   Fuel capacity                             5.5 liters
Overall length (mm)                      1430                                                           Type                                    PB




                                                                                                   Carburetor
Overall width (mm)                        905                                                           Main jet No.                           #100
Overall height (mm)                      910                                                            Venturi dia.(mm)                       14
Wheel base (mm)                          965                                                            Throttle type                        PISTON
Engine type                             O.H.C.                                                          Type                                   CDI




                                                                                                     Ignition System
                                                           Electrical Equipment
Displacement (cc)                        89.9                                                           Ignition timing                 28°BTDC/4000rpm
Fuel Used                       92# nonleaded gasoline                                                  Contact breaker                Non-contact point type
                    Front wheel            58                                                                          Spark plug          NGK C7HSA
Net weight (kg) Rear wheel               56.5
                        Total           114.5                                                           Spark plug gap                     0.60.7mm
                    Front wheel          61.5                                                      Battery Capacity                          12V4AH
Gross weight(kg) Rear wheel              58.5                                                      Clutch Type                                 CVT
                                                                              Power Drive System

                                                                                                     sion Gear
                                                                                                     Transmis-
                        Total             120                                                                          Type                 Helical gear
 Tires              Front wheel        18*7-8                                                                                         Automatic centrifugal
                                                                                                                       Operation
                     Rear wheel        18*9-8                                                                                                  Type
Ground clearance (mm)                    104                                                              Type                                V-Belt
       Breaking distance
                                                                                                   Gear
                                                                                                   Reduction




          (m)(ANSI)                  20.6 below                                                           Primary
                                                                                                          reduction                           0.8~2.5
     Starting system            Motor & Kick starter                                                      Final
     Type                         Gasoline, 4-stroke                                                      reduction                            9.255
     Cylinder arrangement          Single cylinder                                                 FR/RR tire rolling
                                                                                                                                             1436/1436
                                                             Moving Device




     Combustion chamber type        Semi-sphere                                                    circumference(mm)
     Valve arrangement           O.H.C., chain drive                                               Tire pressure              Front            0.25
     Bore x stroke (mm)               47X51.8                                                      (kg/cm)                    Rear             0.25
     Compression ratio                  10.0:1                                                     Turning                    Left             35°
     Compression pressure                                                                          angle
     (kg/cm)                             16.0                                                                                 Right            35°
     Max. output (ps/rpm)             6.3/6500           Brake system                                                         Rear          Disk brake
Engine




     Max. torque (kg m/rpm)           0.7/5500           type                                                                 Front         Drum brake
             Intake      Open              2°
                                                                                                                                            Swing axle
                                                         Device
                                                         Damping




                                                                                                                              Front
     Port (1mm)          Close            26°                                                      Suspension
     timing Exhaust Open                  44°                                                      type                       Rear          Swing arm
             (1mm)       Close           -17°
     Valve clearance Intake               0.1            Frame type                                                                       Steel tube frame
     (cold) (mm)        Exhaust           0.1
     Idle speed (rpm)                 1700rpm
             Lubrication type     Forced pressure &
         System
         Lubrication




                                      Wet sump
             Oil pump type      Inner/outer rotor type
             Oil filter type     Full-flow filtration
             Oil capacity              0.8 liter
             Oil exchanging
                                       0.7 liter
             capacity
     Cooling Type                    Air cooling

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