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Untitled Document
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Rok engines - Technical Tips
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Model
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ROK
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SUPER ROK
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| Manufacturer |
Vortex S.r.l |
Vortex S.r.l |
| Homologation |
FIA AUTHORIZED SERIES |
FIA AUTHORIZED SERIES |
| Original Bore |
54,05mm |
54,07mm |
| Max Allowed Bore |
54,28 mm |
54,28mm |
| Stroke |
54 ± 0,2mm |
54 ± 0,2mm |
| Original Displacement |
123,95 cm3 |
123,95 cm3 |
| Conrod holes interaxle |
102 ± 0,2 mm |
102 ± 0,2 mm |
| Exhaust |
184º max |
194º max |
| Booster |
179,5º max |
179º max |
| Main Transfer |
131º max |
135º max |
| Secondary Transfer |
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131º max |
| Capacity |
22 KW at 11500 rpm |
26,5 KW at 12500 rpm |
| Max Torque |
19,6 Nm at 10000 rpm |
20,2 Nm at 11500 rpm |
| Max rpm |
13800 rpm (electronically rev limited) |
16700 rpm (electronically rev limited) |
| Carburetor |
Dello'orto D.30 or with diaphragm |
Dello'orto D.36 or with diaphragm |
| Fuel pump |
Dell'orto |
Dell'orto |
| Exhaust System |
Exhaust with intake silencer |
Agreed Exhaust with integrated silencer |
| Drive Monolith |
Centrifugal dry clutch |
Centrifugal dry clutch |
| Squish (min height) |
1,0mm |
1,0mm |
| Ignition |
PVL 500-177 |
PVL 500-192 |
| Spark Plug |
NGK B10 EG |
NGK B10 EG |
| Mixture |
3% High quality homologated 2-stroke oil |
6% High quality homologated 2-stroke oil |
| Timing |
2,3 - 2,6 |
5,0 - 5,5 |
| Carburetor Main Jet |
160 - Free to be changed |
200 - Free to be changed |
| Carburetor Idle Jet |
60 - Free to be changed |
120 - Free to be changed |
| Carburetor Idle Diffuser |
45 - Free to be changed |
45 - Free to be changed |
| Carburetor Throttle valve |
40 - Fixed |
50 - Fixed |
| Carburetor Mixture needle |
K28 - Fixed |
K22 - Fixed |
| Carburetor Spray Nozzle |
DP264 - Fixed |
DP269 - Fixed |
| Carburetor Starter Jet |
60 - Fixed |
60 - Fixed |
| Carburetor Needle Valve |
250 - Fixed |
350 - Fixed |
| Carburetor Floater |
4gr - Fixed |
4gr - Fixed |
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