TECHNICAL DESCRIPTION OF ASSEMBLY GROUPS.
Engines made by JIKOV are vertical 2-stroke ignition one-cylinder engines with atmospheric filling and forced air
cooling. Crankcase, cylinder, flange and case cap are aluminium castings worked on functional surfaces. Crank shaft is
mounted in two antifriction bearings. Rotor of cooling system fan and cup of engine manual starter are mounted on the
upper end of the shaft. Air cleaner has a high-quality cleaning insert and oil filling in the cleaner body enables operation
even in a very dusty environment. Carburetter with control in on the left side of the engine. It is equipped with a fuel
cock and starting air throttle for easier starting of the cold engine.
DV
engines are equipped with a decompression
valve for easier start of the engine.
Ignition is located on the front engine face. Dynamo-magneto is on the rotor of ventilator which is under the plastic
tank.
Plastic fuel tank is located above the engine. Fuel system is equipped with a fuel cleaner.
Engine is started by manual starter which is mounted so that the driver can start the engine from the machine operator’s
site. It consists of a cup with incisions, disk with pawls, winding cord and handle.
Exhaust silencer is on the right side and it is provided with a casing to prevent burning of the operator when handling
the engine.
Engine rotations are controlled by an automatic speed-limit device. A lever which falls into incisions in the tank holder
is to control engine rotations in three stages of regulation.
On the lower part of the engine an aluminium flange is screwed on inside which there is a twin-jaw centrifugal clutch
whose design makes it possible to adjust a correct function of clutch switching in dependence on engine rotations by
means of adjustment bolts. Clips of quick-operating clamps by means of which the engine unit is to be secured on the
gearbox are screwed onto the flange.
IV. INSTRUCTIONS FOR USE.
MACHINE ASSEMBLY
The drive unit consists of a complete engine assembly (with clutch, steering members and flange) and handlebars.
The complete engine assembly is first added a holder of handlebars, which is to be screwed onto bolts on the rear side
of the engine by using nuts M8 and washers. Recommended tightening moment is 15.7 Nm.
Carrier tube of handlebars is to be slid into the lower swivel joint on the holder of guide handrails and the handlebars
are to be secured with carriage bolt M10x100, flat and lock washers and tightening crank.
Accelerator lever is to be screwed onto the right handrail in front of the rubber grip with a bolt and nut which are parts
of the accelerator lever. Mount the lever so that it does not bump into the rubber grip but is rather easy to reach even at
the position of adjusted maximum rotations. Bowden of gas control should be led from above through the carrier tube of
handlebars. Gas litz wire is to be set by means of adjustment bolt on the bowden so that the carburetter control has only
a negligible backlash.
Figure 1:
Drive unit assembly
Vodicí rukojeti
Guide handlebars
Aretační páčka stranového natáčení
Arrestment lever of turning to sides
Motor JIKOV
Engine JIKOV
Madlo pro přenášení
Grip for displacement
Příruba, rychloupínač, odstředivá spojka
Flange, quick-operating clamp, centrifugal clutch
Deska s čepem a otočným držákem řídítek
Plate with pivot and swivelling holder of handlebars
Kabel zkratování motoru
Engine short-circuiting cable
Madlo řídítek
Handlebar rail
Utahovací klička
Tightening crank
Spodní kostka na nosné trubce řídítek
Lower box-angle plate on the carrier tube of handlebars
Vratový šroub M10x100
Carriage bolt M10x100
Páčka akcelerátoru
Accelerator lever
Bezpečnostní vypínač zapalování BVA-96
Safety ignition switch BVA-96
