20162016eolstoragewe.blob.core.windows.net/wm-553616-cmsimages/SpecM… · Attention : ALL THE ENGINE PARTS MUST BE ORIGINAL BY VORTEX ROK. Neither engines nor accessories can be

Attention : ALL THE ENGINE PARTS MUST BE ORIGINAL BY VORTEX ROK.

Neither engines nor accessories can be modified. By this we mean any shape, content or function changes which may differ from what

previously conceived. Furthermore this includes any addition and /or removal of material and /or parts from the engine set-up package

unless provided by this regulation.

- pag. 1 - www.vortex-rok.com

MICRO ROK 2016 20162016

IDENTIFICATION SHEET

. This Identification Sheet reproduces descriptions, illustrations and dimensions of the MICRO ROK engine to be used in the

MICRO ROK CUP PROJECT recognized by Motorsport South Africa.

http://www.vortex-rok.com/






MICRO ROK 2016 20162016

CYLINDER BASE CYLINDER HEAD AND COMBUSTION CHAMBER

PICTURE OF THE CRANKCASE

INTERIOR PICTURE OF THE CRANKCASE

PICTURE ENGINE UPPER SIDE PICTURE ENGINE LOWER SIDE







MICRO ROK 2016 20162016

TECHNICAL INFORMATION AND CHARACTERTICS

Max displacement

55.3 cc.

Max allowed bore

42.10 mm

Stroke

39.70 mm

+/- 0.2 mm.

Admission system in the cylinder

Piston Port

Maximum power

4 HP

Cooling system

Air cooling

Carburetor :

CARBURETTOR DELL’ORTO PHBN 14 MS

See description page. 16

Number of transfers

2

Shape of exhaust transfer

At 4 angles

Width of exhaust transfer

25.3 mm.

MAX

Width of admission transfer

21 mm.

MAX

Total height of piston

48.5 mm.

+/- 0.2 mm.

Weight of piston

59 gr.

+/- 5 gr.

Weight of crankshaft with conrod

1082 gr.

+/- 15 gr.







MICRO ROK 2016 20162016

Shape of combustion chamber

Spherical, verifiable with gauge supplied by the Manufacturer

Engine Pinion Rear Sprocket

Z11 85 or 86 tooth

Bearings Crankshaft

20x14x47

Volume of combustion chamber

5.8 cc. Min, over spark plug thread with

Tolerance

Transfers

112°

+/- 2°

Admission

145°

+/- 2°

Exhaust

154°

+/- 2°

All port duration readings must be measured with a 0,20 mm

thick and 5 mm wide wedge. (see drawing beside).

B

OPENING ANGLES measured through a thickness gauge of 0,20 mm having width of 5 mm and

degrees wheel with 200 mm diameter.







MICRO ROK 2016 20162016

PROCEDURE USED TO MEASURE THE VOLUME OF THE COMBUSTION CHAMBER

Disassemble the engine from the chassis

Wait until the temperature is ambient temperature

Disassemble the cylinder head in order to verify the projection of the sparking plug inside the combustion chamber.

Disassemble the sparking plug ( verify the height of 18,5mm)

Screw the “INSERT” at the place of the sparking plug (The insert on the cylinder head has not to overpass the superior part of the combustion chamber. It has to be fixed on the cylinder head in the same way the sparking plug of 18,5mm was fixed)

Make it air tight and water tight with grease the upper part of the piston and the cylinder device

Raise up the piston and stop the crankshaft

Dry up the excess of grease

Refit the cylinder head and torque to 20NM

Be sure that the engine is on a flat surface

Move up the cylinder head and tighten it to clamping forces defined by the manufacturer.

Fill up the combustion chamber (with a mixture composed by 50% of the oil used to make the mixture and the 50% of the fuel) using a graduated burette (mechanical or electrical) until the upper border of the insert.

The measured volume must show a value which is complying with the minimum combustion chamber volume set on the engine identification sheet concerned.

PROCEDURE USED TO MEASURE the Port Durations

a. The measuring will be done with a gauge as per the drawing under “cylinder specifications” in this document b. When placing the gauge into the port the gauge is not to be bent and must be held as per photograph below

c. It must be inserted and rest against the cylinder wall opposite the port being measured as per picture above, you should be able to move it forward and backward during this operation, it must not give the sensation that it is somehow blocked. Once the piston has bottomed out no pressure must be applied to the crankshaft to obtain the forward and backward movement of the gauge. The feeling should be the same as when “setting a tappet on a four stroke engine







MICRO ROK 2016 20162016

CYLINDER DEVELOPEMENT

DRAWING OF CYLINDER BASE

CYLINDER SECTION

–







MICRO ROK 2016 20162016

DRAWING OFCYLINDERHEAD AND COMBUSTION CHAMBER

CRANKSHAFT

WIGHT OF CRANKSHAFT WITH CONROD

1082.± 15gr







MICRO ROK 2016 20162016

PISTON

PISTON PIN

PESO DEL PISTONE WEIGHT OF PISTON

60 gr +/- 5 gr

WEIGHT

15 gr Min

Mandatory to have the brand VORTEX cast piston as shown in the picture







MICRO ROK 2016 20162016

CONROD

CRANKSHFT PIN

WEIGHT OF CONROD

67 gr. +/- 10gr WEIGHT OF CRANKSHAFT CRANKPIN

60 gr. +/- 2gr

PICTURE OF CRANKSHAFT







MICRO ROK 2016 20162016

FOTO DELL’ALBERO MOTORE EVIDENZIANDO MASSE PER EQUILIBRATURA PICTURE OF CRANKSHAFT WITH THE BALANCER

PHOTO DE VILEBREQUIN







MICRO ROK 2016 20162016

MINIMUM DISTANCE OF THE CARBURETTOR SUPPORTING PLATE FROM THE CYLINDER

AXLE DISTANCE







MICRO ROK 2016 20162016

INTERIOR VIEW OF THE CRANKCASE

DISEGNO DEL CARTER QUOTATO







MICRO ROK 2016 20162016

EXHAUST MUFFLER

DIMENSION OF COLLECTOR INCLUDING WELDING

Exhaust Weight 1375 gr. +/- 5%

EXHAUST MANIFOLD

EXHAUST GASKET







MICRO ROK 2016 20162016

PICTURES OF SELETTRA IGNITION

IMPORTANT

ALL THE IGNITION PARTS MUST BE ORIGINAL BY VORTEX.







MICRO ROK 2016 20162016

HOUSING AND ROTOR

WEIGHT OF COMPL. CLUTCH ROTOR WITH STARTING GEAR: 815g +/- 15g

ENGAGEMENT SPEED (MAXIMUM) CAN BE VERIFIED IN EVERY MOMENT OF THE EVENT 4000 RPM

WEIGHT OF CLUTCH ROTOR 345 gr +/- 15gr

WEIGHT OF CLUTCH HOUSING 191 +/-10gr

TOTAL WEIGHT OF CLUTCH ROTOR AND HOUSING 547 gr +/- 15gr

COMPLETE CLUTCH ROTOR WITH STARTING GEAR







MICRO ROK 2016 20162016

CARBURETTOR DELL’ORTO PHBN 14 MS AND

COMPONENTS

ESPLOSO CARBURATORE

COMPONENTS

1- FLOAT CHAMBER FIXING SCREW 2- CHAMBER MIXTURE COVER 3- GAS VALVE SPRING 4- CONICAL NEEDLE FASTENER FIX PLATE 5- GAS VALVE 40 6- CONICAL NEEDLE FASTENER 7- CONICAL NEEDLE 8- STARTER KIT ……. 9- AIR ADJUSTMENT SCREW 10- AIR ADJUSTMENT SCREW SPRING 11-ADJUSTMENT GAS VALVE SCREW KIT 12- SPRAY NOZZLE GA12 13- JET MAX 75 14- STARTING JET 50 15- JET MIN 38 16- GASKET BAG 17- FLOAT KIT

ONLY ALLOWED SETTING

PART NO DESCRIPTION

1536240 64 gas valve 40

16225011 08 mixture needle A11

14671212 28 spray nozzle GA212

0641375 02 high speed jet TBA

1160038 02 idle jet 38

06217150 02 idle jet – emulsifier 50







MICRO ROK 2016 20162016

Any mechanical, manual or electronic system as well as any other kind of device is forbidden. Concerning the fuel supply, the only system

admitted includes atmospheric pressure. It means that it is allowed to employ 1 (one) pneumatic “fuel pump”, located between tank and carburetor: the “pump” must always be ORIGINAL.

IT IS FORBIDDEN TO EMPLOY ANY OTHER KIND OF SPIGOT, JUNCTION, OR SIMILAR DEVICES between the supply and the return/collection, on the fuel pipes.

IT IS ADMITTED TO EMPLOY PIPES, ONLY.

Between tank, pump and carburetor it is allowed to mount only 1 (one) fuel filter.

DELL’ORTO FUEL PUMP, code 11023







MICRO ROK 2016

.

Engines shall be mandatory switched on and off by means of onboard starting system. Officials shall check the on-off onboard system anytime.

IMPORTANT

THE BATTERY USED TO START THE ENGINE COULD BE FIXED ON THE CHASSIS.

STARTER WIRING







MICRO ROK 2016

MODEL TYPE MINI

MARKED VORTEX

INLET SILENCER


Documents

20162016eolstoragewe.blob.core.windows.net/wm-553616-cmsimages/SpecM… · Attention : ALL THE ENGINE PARTS MUST BE ORIGINAL BY VORTEX ROK. Neither engines nor accessories can be